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Ashes - Wind turbine simulation
Norway
Registrace 7. 01. 2018
Simis is the maker of Ashes - Aero Servo Hydro Elastic Simulation. Ashes is engineering analysis and design software for wind turbine engineers - known as aeroelastic simulation software.
Why is the torque on a vertical axis wind turbine always positive? - with Ashes
On a lift based vertical axis wind turbine, the torque produced by each blade is (almost) always positive. This might seem counterintuitive at first, but actually makes sense!
Check out www.simis.io if you want to evaluate Ashes for free, and get in touch if you have any question.
Music:
Mitsubachi by Smith The Mister smiththemister.bandcamp.com
Smith The Mister bit.ly/Smith-The-Mister-YT
Free Download / Stream: bit.ly/mitsubachi
Music promoted by Audio Library czcams.com/video/0IgndUb1YQI/video.html
Check out www.simis.io if you want to evaluate Ashes for free, and get in touch if you have any question.
Music:
Mitsubachi by Smith The Mister smiththemister.bandcamp.com
Smith The Mister bit.ly/Smith-The-Mister-YT
Free Download / Stream: bit.ly/mitsubachi
Music promoted by Audio Library czcams.com/video/0IgndUb1YQI/video.html
zhlédnutí: 386
Video
How to model mooring lines as nonlinear springs
zhlédnutí 105Před 4 měsíci
This video explains how a mooring line can be replaced by a nonlinear spring. The nonlinear spring parameters are automatically computed by Ashes
Dynamic stall on wind turbine blades with Ashes - wind turbine simulation software
zhlédnutí 426Před 4 měsíci
This video illustrates how a dynamic stall model affects the lift coefficient on a parked wind turbine blade. The dynamic stall model in Ashes is described here: www.simis.io/docs/bem-algorithm-unsteady-bem And this document shows an example on how it is used in a time simulation: www.simis.io/docs/benchmarking-tests-dynamic-stall-test Feel free to download Ashes from www.simis.io, and get in t...
Fatigue analysis of a wind turbine in time domain with Ashes
zhlédnutí 296Před 6 měsíci
This video shows how a fatigue analysis of an offshore wind turbine can be performed in the time domain with Ashes. Try Ashes for free here: www.simis.io Music Yaki Tori by Smith The Mister smiththemister.bandcamp.com Smith The Mister bit.ly/Smith-The-Mister-YT Free Download / Stream: bit.ly/-yaki-tori Music promoted by Audio Library czcams.com/video/oZ0U4Q5epUs/video.html
How to model a wind turbine stopping in high winds
zhlédnutí 171Před 6 měsíci
Te default controller in Ashes will not pitch the blades to feather in very high winds, which is a behaviour you would expect from real wind turbines. To get this behaviour, you need to use the ROSCO controller and modify the input file. Related question: why do wind turbines shut down in high winds? Check the answer out here: czcams.com/video/shUiV3vbpe4/video.html
How to manage licenses with Ashes
zhlédnutí 103Před 7 měsíci
This tutorial shows how to add and remove users to your user group. Anyone in the user group will have the license corresponding to the group. More info here: www.simis.io/docs/first-steps-with-ashes-your-user-account#7 Music: Cool Cats by Smith The Mister smiththemister.bandcamp.com Smith The Mister bit.ly/Smith-The-Mister-YT Free Download / Stream: bit.ly/3xBPpAP Music promoted by Audio Libra...
Slamming loads on an offshore wind turbine with Ashes and Python
zhlédnutí 796Před 7 měsíci
This video shows how we can compute slamming loads (i.e. loads from a breaking wave) with Ashes. The script used in this example uses Wienke's slamming model (www.sciencedirect.com/science/article/abs/pii/S0378383904001735) Feel free to download Ashes with the evaluation license from www.simis.io, and get in touch if you have any question Music: Mitsubachi by Smith The Mister smiththemister.ban...
Effects of the wake of an upstream wind turbine with Ashes - wind turbine simulation software
zhlédnutí 644Před 9 měsíci
This video compares two situations for a wind turbine: one where the wake of an upstream wind turbine is considered, and one where it is not. The modelling of the wake was made using DIWA, a wake software under development by SINTEF Ocean, based on the Dynamic Wake Meandering methodology as described in the IEC standard. Feel free to contact SINTEF Ocean if you want to know more (www.sintef.no/...
Research Seminar at the University of Bristol: full presentation
zhlédnutí 85Před 9 měsíci
This is the full presentation given by Loup at the Research Seminar organised by the Earthquake and Geotechnical Engineering Group of the University of Bristol on the 25th of November 2023. Thanks a lot to Raffaele de Risi for the invitation, to Andrea Diambra for showing him around and to Tingfa Liu for organising the seminar.
Failure events: Ultimate Limit State with Ashes - wind turbine simulation software
zhlédnutí 173Před 9 měsíci
This is an excerpt of the presentation given by Loup at the Research Seminar organised by the Earthquake and Geotechnical Engineering Group of the University of Bristol on the 25th of November 2023. Thanks a lot to Raffaele de Risi for the invitation, to Andrea Diambra for showing him around and to Tingfa Liu for organising the seminar.
Failure event: Mooring line breakage with Ashes - wind turbine simulation software
zhlédnutí 48Před 9 měsíci
This is an excerpt of the presentation given by Loup at the Research Seminar organised by the Earthquake and Geotechnical Engineering Group of the University of Bristol on the 25th of November 2023. Thanks a lot to Raffaele de Risi for the invitation, to Andrea Diambra for showing him around and to Tingfa Liu for organising the seminar.
Failure event: Loss of Torque with Ashes - wind turbine simulation software
zhlédnutí 109Před 9 měsíci
This is an excerpt of the presentation given by Loup at the Research Seminar organised by the Earthquake and Geotechnical Engineering Group of the University of Bristol on the 25th of November 2023. Thanks a lot to Raffaele de Risi for the invitation, to Andrea Diambra for showing him around and to Tingfa Liu for organising the seminar.
02 - What is the cli?
zhlédnutí 196Před 9 měsíci
This video explains what we mean when we talk about Ashes-cli and how it can be used within a script: - Ashes-cli stands for Ashes-command-line-interface - Ashes-cli enables you to run Ashes simulations from a command prompt - you can call and run commands from a coding framework such as Python or Matlab You can find the Matlab script used in this video in the folder Documents\Ashes X.xx\Ashes-...
01 - Introduction to Ashes
zhlédnutí 335Před 9 měsíci
Ashes is a finite element software optimised to do wind turbine analysis. Check this video for the basics on how to get started with Ashes: czcams.com/video/9pfsiNq-GGo/video.html If you run into any issues, you can - check our video tutorials on how to use Ashes: czcams.com/play/PLkxg02c9QfHcXmDkFN8FI4-XATQuL7S2I.html - check our User Manual: www.simis.io/docs/user-manual - post a question on ...
How to adjust displayed fields in a given sensor - Ashes wind turbine simulations
zhlédnutí 112Před 9 měsíci
How to adjust displayed fields in a given sensor - Ashes wind turbine simulations
Tutorial: adjust your separator/delimiter to see csv files in Excel - Ashes wind turbine simulations
zhlédnutí 156Před 9 měsíci
Tutorial: adjust your separator/delimiter to see csv files in Excel - Ashes wind turbine simulations
JONSWAP spectrum and FFT for irregular waves in Ashes - wind turbine simulation software
zhlédnutí 964Před 10 měsíci
JONSWAP spectrum and FFT for irregular waves in Ashes - wind turbine simulation software
Second moment of area on an I beam with Ashes - wind turbine simulation software
zhlédnutí 224Před 10 měsíci
Second moment of area on an I beam with Ashes - wind turbine simulation software
What happens during a grid loss fault? - with Ashes, wind turbine simulation software
zhlédnutí 527Před 11 měsíci
What happens during a grid loss fault? - with Ashes, wind turbine simulation software
Very large wind and wave floating platform with Ashes - wind turbine simulation software
zhlédnutí 295Před 11 měsíci
Very large wind and wave floating platform with Ashes - wind turbine simulation software
Wave loading on a wind turbine monopile: Drag loads vs Inertia loads with Ashes
zhlédnutí 943Před 11 měsíci
Wave loading on a wind turbine monopile: Drag loads vs Inertia loads with Ashes
Ashes-cli (command line interface) tutorial: How to script your wind turbine simulations
zhlédnutí 318Před rokem
Ashes-cli (command line interface) tutorial: How to script your wind turbine simulations
Bird collision avoidance for wind turbines with Ashes - aeroelastic simulation software
zhlédnutí 1,1KPřed rokem
Bird collision avoidance for wind turbines with Ashes - aeroelastic simulation software
Negative damping of a floating wind turbine with Ashes - wind turbine simulation software
zhlédnutí 1,9KPřed rokem
Negative damping of a floating wind turbine with Ashes - wind turbine simulation software
best video of the world
Well, maybe not the world, maybe just of CZcams, but thanks a lot!
Thanks a lot!
Perfect explanation!
Thanks!
suggestion, make the next video 'Velocity vector at different angle of attack' Thank you :)
Noted, thanks for the suggestion! You can also try yourself if you feel like, you can try Ashes at www.simis.io
Note that we now support any version of Python, you do not need 3.10 and can use any newer version you wish
Great video, thanks.
I liked your explanation.😊 can but I need to know what kind of simulation app are you using can you tell me please?
It's called Ashes, you have more info in the description
The icon doesn't show to me...
What version of Ashes are you using?
free version 3.20
@@sportslover5679 Right, it is a feature that is only available in Ashes 3.21 (free doesn't matter, the free version has all the features but can only be used for evaluation for two weeks). You can send us an email at support@simis.io and we can send you a link to download 3.21
Try to make a fatigue analysis for mooring lines videos. Thanks
The rating of blades and motor workings, It is not rocket science numb nut. They stop to protect the blades and workings.
how much money i need to buy license?
It depends on your use case. Get in touch with us at sales@simis.io and we can have a chat about licencing options for you
Hi, which model does ashes uses to simulate DS behavior?
We use Stig Oye's model, you can read more on it here: www.simis.io/docs/bem-algorithm-unsteady-bem#2 In what context are you asking? Do you use aerodynamic software yourself?
Hello. Thank you for sharing good tutorials. I have one question regarding running Ashes with batch files. Currently I am studying optimization of wind turbine structure(My model has three legs to support turbine, called tripod support). I implemented optimization code in MATLAB and Ashes 3.20 are running inside the optimization loop by 'batch file.csv'. The problem is... When I open the Batch manager after optimization, e.g. 2000 iteration loops, then I could see thousands of 'lists of batch run ' in the manager. It makes the Ashes very slow and almost stop. Could you help me how to delete those long lists of 'Batch runs'? I can share more in detail, if you don't mind to leave your e-mail
Hi, thanks for the question Yes, it is easy to delete the batches, can you send us an email at support[at]simis.io?
Brilliant
Thanks!
Can you show to how to download the graphs form this software?
You can export all graphs with the "Generate report" button. Please ask the question on our forum (here www.simis.io/q-and-a/) so I can add links and screenshots
@@AshesWindTurbineSimulation Thank you so much. Can we download the data and create graphs in Excel or other software?
@@sportslover5679 yes, you can have a look at our user manual here to see how to do that: www.simis.io/docs/sensors-export-the-data
Very nice video! How much does the direction of waves matter at time period corresponding to eigen frequency of the turbine?
Hi, what do you mean with 'matter'? Are you wondering about whether it will still trigger the eigenfrequency, its impacts on the loads...
@@AshesWindTurbineSimulation correct, that's what I meant :)
@@33Mysterious Still not sure which one of the two you mean :) About triggereing the eigenfrequency, yes it still will. The support structure eigenfrequencies are virtually the same in all directions About impact on the loads: for fatigue loads, what matters is how much aerodynamic damping there will be, so it has to do with whether the direction of the waves match the orientation of the blades
Can I get the excel ?
Are you part of the NTNU course? If so, you should ask your teachers (we don't have it)
Thank you always for those nice videos, really helps to understand wind turbine behavior
Very happy to read this thanks a lot!
Hello, when simulating a parked wind turbine, supported on monopiles. Which loadings becomes more?. Is it the wave loads or the wind loads?, since the turbine is now parked.
Great question! Obviously it depends on the wind and wave conditions, but for example in the case of a storm, in our experience, the wave loads are dominant for ultimate limit state. That is very easy to check though, just run two simulations, with the rotor parked and in operation
Very very interesting. So floating wind turbine usually pitch the plade also within the oscillation period besides the normal pitch control as wind velocity vary. I mean, for V>V_nominal, large wind turbine already pitch the blade to feather to keep the power costant.... and besides this action, they also pitch the blade when the turbine oscillate to dampen this movement ? If it is like that, what happens if within the oscillatory period and motion the wind suddenly varies.... you should somehow couple the two control strategies ?
As far as we understand, with this controller, the blades are pitched to keep the rotational speed of the rotor constant at the rated RPM: when the wind speed increases, the aerodynamic torque also increases and that makes the RPM increase, so the blades are pitched to decrease the RPM back to the rated value. But the controller doesn’t know (and doesn’t care!) why the RPM increased: is it because the turbine is moving forward or because the incoming wind has increased? It doesn’t matter, the controller will just pitch the blades. The point of the video is that if the speed at which you increase the blade pitch is not adequate, you might introduce negative damping, so it is something to be careful about. But wind turbine controllers are extremely complex, and I am sure there is a lot of thought put into how controllers interact with floater stability. We are not control experts, it would be great if someone that is could comment on this topic.
how to replicate this on the ashes, please help , i am not able to add multiple wind turbines to create and wind farm and study wake effect
If you are studying the wake effect, you don't need to create multiple wind turbines. What you need is another software (such as DIWA) that will create a wind field that incorporates the effect of an upstream wind farm, and then use that wind field on the wind turbine in Ashes. in this video, we created multiple wind turbines only for illustrative purposes, but the interaction between them is not computed by Ashes
Hi, mate, I am a senior-year high school student who is on his way to complete the IB programme because of you. In this programme, there is a thing called "Extended Essay," which is something that if you do not complete it, you are not going to graduate. It's a thing where you need to do extensive research on a specific topic related to the subject of your extended essay. In my scenario, it was physics, and I was writing an extended essay about the effect of varying angles of attack on turbine baldes on their power output efficiency. To write this essay, every student has more than a year, but because of my proper planning and disciplined work ethic, I started and finished in 4 days, just before the submission deadline. Since I started so late, I didn't have time to do an experiment to support my claim. I was in a desperate search to find a simulation or a past experiment until I came across one of your past videos where you explained the pitching system of the turbines in your simulation. I definitely bought and installed your simulation and used it in my extended essay, and I cannot express in words how thankful I am to you and your work. Honestly, you are the man who helped me grade from IB if my extended essay wouldn't fail to get the minimum grade, so if you didn't create this simply, I wouldn't submit it in time and graduate from the program. There is a saying that translates to English in my language as "May God bless you and grant you whatever you desire." I think that would express how grateful I am to you. I wish you all the best in the future, mate. Take care
That's really cool to hear, glad it was helpful! What high school was that? Do you think more students there could benefit from Ashes? Feel free to write to us at support@simis.io to have a chat about this!
Hi! Is it possible to import wind data file?
What data does your file contain? Is it a wind field (for turbulent wind) or a time history of one single wind speed at the hub? In both cases the answer is yes, but it will be done in different ways
The wind data was collected from a pre installed macht, that has collected information for a span of a year.@@AshesWindTurbineSimulation
Is there any option that can save the graphs from it?
Yes there is an option, can you post your question on our forum (www.simis.io/q-and-a) so that we can reply with pictures?
@@AshesWindTurbineSimulation Where is it? and how ?
@@sportslover5679the forum is here: www.simis.io/q-and-a and the option to export graphs is an inon on the top right corner of the graphs pane. If you post a question on the forum I can add a picture showing where it is
Hii Can I connect with you through mail?
I am not able to open it in my computer? Can you help with that? i already paid for the licence .....Thanks in advance
Thanks, we replied to the email you sent us as well. In general, when you have a question like this, it is better that you write to us at support@simis.io, so that you can include a more detailed description of the issue together with screenshots of the issue
Is it possible to use a controller written in Python or Matlab Simulink instead of using the antiquated and clunky DLL approach? (asking for a friend)
Why can't turbine blades be designed to be 'feathered' ( as in aeroplane propellors)? The pitch could be altered manually or by wind speed sensors.
A big difference between airplane wings and wind turbine blades is that wind turbine blades are rotating, which means that they experience both the incoming air flow (due to the wind) and what we call a rotational wind velocity due to their motion through the air. The sum of the two is the relative wind. As you can imagine, the further along the blade, the higher the speed of the blade through the air and thus the higher the relative wind. That is why the blades cannot be ‘flat’ as for airplanes but need what we call a twist angle that varies along the blade, to face the relative wind best. And if the blades were feathered, they would not be aligned with the relative wind. This video is relevant: czcams.com/video/OOP6Mbn0Gbw/video.html
@@AshesWindTurbineSimulation So why can't the turbine mechanism be designed to swivel andface the oncoming wind???
@@johnblack4318 Right, do you mean turning the whole rotor so that it faces the wind (rather than individual blades)? Yes, that is done, it's called yawing the turbine. Feel free to download Ashes (www.simis.io) and give all that a try
All (arguably) utility size wind turbines can be feathered and they are feathered when the control system decides to shut down due to too high winds (showing how a wind turbine shuts doen should probably have been a part of this vid). Usually, though, a wind turbine that is shut down is idling, i.e. it is (still) rotating, but very slowly. This can be quite easily simulated in Ashes using the IEA 15MW reference turbine (that ships with Ashes) and its ROSCO controller (that also ships with Ashes). However, you do have to manually change the input file for ROSCO to shut-down mode. If you do that, the wind turbine will start shutting down when the pitch is at approximately 22 degrees and increase the pitch to approximately 90 degrees. We will probably make a vid soon show exactly this - so, like, subscribe and press the bell ;-)
what about validation of your software?
We have a benchmarking framework where we run tests and compare results with other software, full-scale data, experimental data and results from previous versions of Ashes. We add new tests on a daily or weekly basis, every time we want to test something new (for example when there is a new feature). By running the tests every night we make sure that the results are always up to date. The tests are run every night and published every new release (see www.simis.io/docs/validation-benchmarks-latest-reports for the latest reports). We think it is crucial that the tests are public and fully reproducible, so all the data needed to run the tests yourself are available as well. This video explains how to understand and reproduce the tests: czcams.com/video/GkoBcUybSos/video.html And this blog post gives more details about how the whole thing works: www.simis.io/pages/blog/
very good diagramatric illustration. Thank you.
Is it possible to create different rotor blades and test which ones work the best?
Absolutely, any model can be fully customised (including the blades). But you will have to have a good definition of what 'working the best' means, as there are many parameters to consider! Feel free to download and try Ashes for free at www.simis.io
Hey i really like the app, but is it possible if we could connect with discord for faster chatting, i'm doing this for my school project. or is here okay?@@AshesWindTurbineSimulation
Is it always comma separated - or can semi colon also be used?
No, semi-colon does not work, but we could add it
The python script that computes the slamming load where can we find? Also I am new to Ashes, did you generate the bottom load graph by importing the python script to ashes, or have I misunderstood? Please enlighten me briefly whether script is used to generate the graphs you showed.
The script is not shipped with the current version of Ashes, but get in touch with us (support@simis.io) and I will happily share it with you. And the graph is generated by Ashes, not by the script. There are a couple of ways to plot graphs, the simplest is probably to right-click on the load you want to plot and add a sensor
great video
Very happy you liked it!
Very well explained. Thank you.
Your videos on being grateful.I respect your work but did you know that your videos have a lot of value that if you can convey to a global audience, your business will massive grow exponentially and your dignity will increase as much as they benefit you.But problem was your video isn't rank on google thats why day by day you upload videos but no viewers reach them. How many customers are you constantly losing by not doing that. Thanks
Hello It was great, thank you
I can't reproduce this flutter case. Is it possible to download this model to see the difference in specific Settings?
Unfortunately that is a quite old model that we created with an older version of Ashes, and we don't have it anymore. I cannot remember the specific settings that we used, but I'll see if I can recreate it
Sincerely thanks for your kindness.@@AshesWindTurbineSimulation
This is interesting. Is it possible to add aerodynamic damping in the blade sensors in the future.
What quantity would the sensor show?
For example, use the aerodynamic force times the displacement to get the aerodynamic work of each blade element; Take the sum as total aerodynamic word of blade. The aerodynamic damping coefficient is obtained again without dimensionalization.@@AshesWindTurbineSimulation
Similar to the definition of aerodynamic damping of aircraft wings. When the aerodynamic force does positive work, it is negative aerodynamic damping, and the structure is in self-excited loose vibration.@@AshesWindTurbineSimulation
@@wuhongxin_wind very interesting, thanks for the suggestion!
May I ask when 3.21 can be downloaded on the official website? As of now it is still 3.20.
3.21 will be released early next year, january or february. Is there a specific feature from 3.21 that you need?
Thank you for your reply. When I followed the video operation, I found that 3.20 could not run as the video. like the"Make rotor characteristics curves" at 05 video and the matlab tools.@@AshesWindTurbineSimulation
@@wuhongxin_wind That is correct,that is a feature of Ashes 3.21. Please send me an email at loup.suja@simis.io and I will try to help you
Is aerodynamic damping taken into consideration mainly for offshore wind turbines? If sea waves are the cause of this phenomenon for the offshore case, what could be the equivalent phenomenon for onshore wind turbines?
You could also have gusts of wind in onshore wind turbines, that would trigger some vibrations, and in that case aerodynamic damping would be beneficial to the structural integrity of the wind turbine as well. But aerodynamic damping is inherently taken into consideration in the time simuation (at least with Ashes), you can't turn it off...
is it possible to do surface roughness analysis by this software....
XFoil comes with the software, so you could generate different polars for your airfoils for different surface roughnesses and then compare how they perform
Very interesting your exposition, I would like to ask you, I would like to make the spectrum but with velocities of 50 m/s or more, taking into account acceleration vs time. Any literature you can recommend me. Thank you in advance.
When you say 50 ms, I assume you are talking about wind velocities, right? And what do you mean with 'taking into account acceleration vs time'? Do you want to plot a certain acceleration as a time series? Which acceleration is that?
@@AshesWindTurbineSimulation Yes, it is the wind speed, and when I say acceleration vs. time it is the data I need to perform a dynamic analysis on a structure.
@@manu3308 ok, then you can definitely do that in Ashes, I suggest you download it and try it for free from www.simis.io. The best place to see how to do use Ashes is through our tutorials on our CZcams Channel, or our user manual (www.simis.io/docs). If you have any question don't hesitate to post it in the forum (www.simis.io/q-and-a ).
@@AshesWindTurbineSimulation Thank you very much for replying, you know that when I activate the forum it shows 404 - Page not found. I take advantage of your kindness if you have a specific tutorial to which I can direct me and how to download the value in a txt or excel file to model that spectrum in Etabs. I am modelling an elliptical shaped roof and the idea is to model the dynamic wind analysis using a spectrum or time history with wind loads.
@@manu3308 Sorry I had mistyped the link: it is www.simis.io/q-and-a Our tutorials are here, the list is in order so you can start with the first video: czcams.com/play/PLkxg02c9QfHcXmDkFN8FI4-XATQuL7S2I.html And we don't have a video tutorial on how to download the data, but you can find that info on our user manual here: www.simis.io/docs/sensors-export-the-data
Very interesting! I understand that in the equal energy method you are working with equivalent areas under the PSD spectrum. My main concern would be that at the tails of the wave spectrum, where your energy is relatively low, you may end up with few components representing a wide range of frequencies. So, your spectrum would tend to be discretized in few peaks there. I guess you could try to minimize this drawback by reducing the target energy values.
You are 100% right Roger, actually that discretisation is also sometimes called "Equal area discretisation". And about higher frequencies being poorly represented, in Ashes you do have the possibility to subdivide the higher frequency components into smaller bins, to get a finer discretisation at the tail of the spectrum. This is from our Theory manual (here, in case you are interested: www.simis.io/docs/water-particle-kinematics-irregular-waves#3): "...the last components cover a wide frequency range compared to the other components. This means that there will be comparatively fewer components modeling the higher frequencies of the spectrum, which can be a problem when simulating the response of certain structures. [...] In order to solve this issue, it is possible to further divide each of these frequency bins into smaller bins. The parameter Frequency delta limit allows you to set a maximum frequency width for each component as a product of the average difference between two consecutive frequencies. [...] this implies that you can end up with more than N components [that's the input from the user], and that the extra components will not have the same energy as the rest."
Hi, how can we export this graph to word file ?
You can export all graphs with the "Generate report" button. Please ask the question on our forum (here www.simis.io/q-and-a/) so I can add links and screenshots
Do blade angles adjust with speed in your demo?
You mean whether the blades are pitching? Yes they are, you can see the value in the Control pane at the bottom of the screen
It's not drug but drag (draag) force ;)
Hello Sir, I have a request. We are a group of 4 students taking a course titled "Human-Computer Interaction" this semester in software engineering and data science. Our prof suggested we build an app for forecasting model for wind turbines. WE thought about a project title "Wind Turbine Asset Management App" but this looks a very challenging topic for us and we are looking for ways to simplify it. Basically we want to show: Wind speed (Forecast - Realized) --> Power Generation (Forecast - Realized) x Energy Market Price Forecast on the time axis (day-week-month) = Revenue/day-week-month, then we will apply a method called "discounted payback period" to show to the investor that his investment will pay back in X years in real-time. So, we want to give the investor the opportunity to monitor the payback period based on various variables like wind speed, wind direction, uptime of the turbine etc. We need to learn how much power is generated with changing wind speed and wind direction. Let's assume that the wind speed and direction forecast is available. we can also get the realized values measured. But how much power is going to be generated is our question. I would be appreciated if you could make any recommendation for a source in order for us to look into. Thanks.
what is the name of this program pls ?
It's called Ashes, you can find a link in the description to download it
great.....why the lift force decreases when the angle of attack decreases ?
Because the pressure distribution around the airfoil changes to a configuration that gives a smaller lift force. You can actually try that with Ashes, if you use the Investigate option in the airfoil database (see www.simis.io/docs/databases-airfoil-database)