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Sonic flow exists at the throat of an equilibrium chemically reacting nozzle flow?(a) True(b) FalseThe question was asked in a national level competition.My question comes from Area-Velocity Relation in portion Quasi-One-Dimensional Flow of Aerodynamics

Answer»

Correct option is (a) True

Easy explanation: According to the area-velocity relation for a quasi one-dimensional flow, the relation is given as:

\(\FRAC {DA}{A}\)=(M^2-1)\(\frac {du}{u}\)

For sonic flow, Mach number = 1. Therefore for M=1 we get \(\frac {dA}{A}\)=0, thus sonic flow does exist for an equilibrium reacting NOZZLE flow at the throat.



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