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Isentropic flow tables for air are usually tabulated against

  • A.Static pressure
  • B.Mach number
  • C.Reynolds number
  • D.Prandtl number

Answer: B

Every isentropic ratio -- stagnation to static temperature, pressure and density, and the area ratio relative to the critical area -- is a function of Mach number and the specific heat ratio alone. Tabulating against Mach number therefore captures the whole of isentropic flow for a given gas.

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