Explained: Converging-Diverging Nozzle
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- čas přidán 31. 10. 2017
- Why do rocket engines look the way they do? In this video, I'll be explaining what a converging-diverging (CD) nozzle is, and how the flow changes as it passes through it.
See the Relevant Videos section below for some more in-depth videos on each of the flow states, including examples!
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===== NOTES =====
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► At 11:28, I say "so far, we have subsonic flow throughout the nozzle for all these cases." I meant to say that we have isentropic flow throughout the nozzle for all these cases.
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===== RELEVANT VIDEOS =====
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Pressure Ratio Delineations
goo.gl/VQnH1n
Normal Shock in the Nozzle Calculations
• Calculating Shock Posi...
Overexpanded Flow Calculations
Coming soon!
Underexpanded Flow Calculations
Coming soon!
Area-Mach Number Relation
goo.gl/j4FwQX
Sonic State (Critical, Star)
goo.gl/vhjESy
Normal Shock Relations
goo.gl/bhw6Ln
Isentropic Relations
goo.gl/mkdNHd
Stagnation Relations
goo.gl/hBY2AV
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===== RELEVANT BLOG POST =====
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www.joshtheengineer.com/2016/1...
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===== REFERENCES =====
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► Notes by Matt MacLean
► Modern Compressible Flow, Anderson
Amazon Link: goo.gl/9B7F8H
► Elements of Gasdynamics, Liepmann and Roshko
Amazon Link: goo.gl/brfScu
► Gas Dynamics, Zucrow and Hoffman
Amazon Link: goo.gl/mwLk8L
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===== THUMBNAIL IMAGE =====
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By NASA (NIX #: MSFC-0201422. [1], Alt. URL.) [Public domain], via Wikimedia Commons
I've never seen a person explaining the delaval nozzle this far. Genius man!
I wish this channel existed when I was studying engineering
Sir i want to called only one thing that. In this rocket science i think main thing is. RADIATION this all causes radiation.According to me. i am a 15 years student in indian .
I couldn't get Science subject due to no vaccancy. But I've always been enthusiastic for Science. And Rocket Science is something that I wanted to study for a long time and eventually I got u as a Fantastic teacher of Rocket Science
wasnt pressure suppose to increase in converging area as the area decrease(pressure = force / area)....... *isentropic subsonic throughout
That's what I literally call myself, "JoshTheEngineer"
The first CZcams video that I don't have to play at 1.5 speed. Great work man
Great video! I just had one question. How is it that we control the Back Pressure? For example, a rocket has its combustion chamber that goes into the converging side of the nozzle with a certain pressure that then is choked and then shot out into the air... so when you say controlling the back pressure how is it that you are controlling the air. Sorry if its a dumb question but I think its critical to me understanding how rocket propulsion works with CD nozzles.
Why do we study the effect of lowering the back pressure and not the increase of the inlet/stagnation pressure? Isn't that a bit counterintuitive?
when are all the cases when back pressure is equal to exit pressure? so confused
Josh, thanks again, you way of doing this is way better than my grad lectures...
Was uploaded 5 yr ago! Still helping people out, beauty of internet.
This is the best CZcams video I’ve ever seen. Been looking for a channel like this for a long time. Thanks man, keep putting out great content.
Thanks for the video! I'm writing code for a college project that finds mach numbers before and after the throat based on different area ratios, and this video really helped. It makes much more sense now!
by far the best theoretical explanation of CD nozzles. Brilliant
Everything makes sense now! Thanks for the upload. Appreciate it.
I'm so happy that I found this channel. Thank you so much Josh
GOLD! I’ve struck GOLD! Thanks for the awesome video. Will certainly watch more.
Very detailed and accurate. A solid explanation!
The best explanation I found for this topic. Thank you!