f14_mud_0304 - shock cause high drag on a blunt nose at...

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Lecture F14 Mud: Normal Shock Waves, Speed of Sound 1. What does “h.o.t.” mean? (1 student) Higher Order Terms. Stuff like d da , du 2 , which become neglible relative to d or da in the infnitesimal limit. 2. What are the small-shock equations used? (1 student) For determining the speed sound a , like we did in class. Also ±or describing the propagation sound waves in general. 3. What in the in±nitesimal-wave analysis becomes invalid for ±nite waves? (1 student) The assumption isentropic flow becomes invalid. Also, the speed sound a is the speed weak waves. Finite shock waves travel at a greater speed V s > a . 4. Confused about different frames when looking at the shock. (1 student) Tough to go over without a board. Maybe in recitation. 5. Does the bow
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Unformatted text preview: shock cause high drag on a blunt nose at supersonic speeds? (1 student) Yes! Thats why supersonic airplanes have pointy noses. Re-entry vehicles are blunt or several reasons, one o them being the act that high drag is desirable or slowing down during re-enetry. 6. What does breaking the sound barrier mean? (1 student) Not much, nowadays. Beore 1945, this barrier was considered as a technological barrier, rather than something the pilot had to break. 7. No mud (4 students)...
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This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.

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