Using a laval nozzle as supersonic inlet - what happens at throat?

Asked Dec 08 '21 at 10:30

Active Dec 08 '21 at 10:30

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I am wondering what will happen, if I use the laval-nozzle , which normaly accelerates a fluid the other way round:

So what happens if I fly with my aircraft at Mach 2 and I collect all the air in my convergent - divergent nozzle ? I think there will be a big shock system which slows down to the fluid.

But: Is it still valid to have at the throat Mach=1 like for a rocket laval nozzle? So I will normaly have an oblique shock right before the throat?

Thank you for your thoughts Lucas

asked Dec 08 '21 at 10:30

Lucas

4

It'll just choke and the shock forms right at the entrance. – user3528438 Dec 08 '21 at 11:11
Appears unrelated to space exploration. – Organic Marble Dec 08 '21 at 12:55
@OrganicMarble might this apply to some air-breathing spacecraft like that British spacerocketplane Skylon? For comparison, Convergent-Divergent / De Laval Nozzle Dimensions was well-received and has two answers, maybe this can benefit from and answer rather than having answering blocked so quickly? – uhoh Dec 09 '21 at 00:02
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As written, it's about an aircraft engine inlet. – Organic Marble Dec 09 '21 at 00:03
This question may be more appropriate in the "aviation" community – Woody Dec 09 '21 at 00:05
I’m voting to close this question because it belongs in "aviation" – Woody Dec 09 '21 at 00:07
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@Woody that's not a close reason. We vote to close if it's off-topic here. "Belongs on" is not our call, that belongs to moderators when deciding where to migrate. See "I’m voting to close this question because it belongs on Physics SE" is bad and here's why – uhoh Dec 09 '21 at 09:25

Using a laval nozzle as supersonic inlet - what happens at throat?

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