Timeline for How do you explain the formation of shockwave on the wing surface during near sonic flight?
Current License: CC BY-SA 4.0
6 events
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| Sep 9, 2018 at 20:06 | comment | added | eliu | Thank you, I will check out the book. However, during subsonic flight, the wing upper surface's shockwave boundary does not form AT the point of supersonic flow, but AFTER the point of supersonic flow. There is always a supersonic flow region before the shockwave boundary. | |
| Sep 9, 2018 at 18:19 | comment | added | niels nielsen | a shock wave occurs in air anytime the local flow velocity exceeds the speed of sound. since parcels of air must accelerate as they flow over the top of a wing, there will come a point where the flow over the top of the wing goes supersonic even though the flow over the rest of the wing is not. | |
| Sep 9, 2018 at 18:17 | comment | added | niels nielsen | I recommend an introductory physics text on sound. a very good one is by Rossing, Moore and Wheeler, "The Science Of Sound" 3rd edition. it contains answers to all your questions. | |
| Sep 9, 2018 at 16:01 | comment | added | eliu | your explanation caused me to realize my lack in other area of knowledge: When the surface of a plane squeeze/impact an air percel, how is sound wave generated? When we speak, violin strings vib, cords are pushing the air molecules back and forth, every cycle of push and retract cause the planar wave to form and propagate. How does a moving object cause sound wave? Imagine a perfect infinite flat object travel in constant speed (flat face facing the fluid) into perfect fluid in subsonic speed, will there be wave propagating out? but, what will be the frequency? | |
| Sep 9, 2018 at 15:12 | comment | added | eliu | Thank you, I think this is a very reassuring microscopic explanation of the shockwave on the tip of a super sonic object. However, what about the shockwave on the surface of the wing during subsnoic flight? | |
| Sep 9, 2018 at 6:26 | history | answered | niels nielsen | CC BY-SA 4.0 |