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The energy equation for a steady adiabatic flow states that the quantity which remains constant is

  • A.The total enthalpy
  • B.The static pressure
  • C.The static temperature
  • D.The flow velocity

Answer: A

With no heat added and no work done, the sum of enthalpy and kinetic energy per unit mass is conserved, so total enthalpy is constant even across a shock wave. Static properties change freely as the flow accelerates or decelerates.

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