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Unformatted text preview: the ow For an oblique shock, and positive away From the ow For a wave. So For the airFoil, = + on both sides. 5. Is an expansion fan a series of shock waves? (1 student) In eect, yes, but they are negative shock waves, with the pressure decreasing rather than increasing as the ow goes through them. Each one is also infnitesimally weak. 6. Does the expansion fan contribute to wave drag, or just the shock? (1 student) Only the shock causes disspation, so in that sense the wave does not contribute to the drag. However, its not possible to have only expansion waves on a body in a supersonic Freestream some shocks must be present as well. So theres always nonzero wave drag. 7. No mud (3 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.
- Fall '05