AME436-S08-PS5

# AME436-S08-PS5 - AME 436 Problem Set#5 Assigned Due at 4:30...

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AME 436 Assigned: 4/5/2008 Problem Set #5 Due: 4/12/2008 at 4:30 pm in OHE 430 (fax to me at 213-740- 8071 if you’re off campus) Problem #1 For each of the following equations a) – c) used frequently in this course, state whether or not each of the following restrictions i) – viii) apply. i. Steady ii. one-dimensional flow iii. ideal gas iv. constant specific heats v. reversible vi. adiabatic vii. no work transfer viii. negligible change in kinetic energy a) Thrust equation: T = ˙ m a [(1+FAR)u e -u 1 ] + (P e -P a )A e b) Enthalpy/velocity relation between states 1 and 2: h 1 + u 1 2 2 = h 2 + u 2 2 2 c) Temperature/pressure relation between states 1 and 2: P 1 P 2 = T 1 " " # 1 T 2 " " # 1 Problem #2 Using the Brequet range equation, estimate within a factor of 10 the range of a seagull. When estimating the heating value of seagull food, note that 1 diet calorie = 1000 thermodynamic calories. (This question always throws students for a loop. The point is not to get an exact answer, but to estimate each of the terms in the Brequet range equation, and see if the result is reasonable or not.)

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Problem #3 Air, ! = 1.4 1 2 3 Shock q in M 1 = 5 P = P 1 T = T 1 M 2 = ???
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