How is the flow compressed in an ideal supersonic wind tunnel inside a diffuser?

A)
Adibatic
B)
Isobaric
C)
Isochoric
D)
Isentropic

Correct Answer :   Isentropic

Explanation : In an ideal supersonic diffuser, the air is slowed to subsonic speed and then expended to the atmosphere. This is done by isentropic compression as ideally there should be no loss in total pressure.

Recently Updated in Aerodynamics Questions
What is the relation between the nozzle A1t and diffuser throat area A2t in the supersonic wind tunnel?
A)
At2 = At1
B)
At2 < At1
C)
At2 > At1
D)
At2 At1 = 1

Correct Answer : Option (C) :   At2 > At1

In which scenario is the throat area of both the nozzle and diffuser the same?
A)
Ideal isobaric diffuser
B)
Ideal isentropic diffuser
C)
Ideal Isochoric diffuser
D)
Ideal adiabatic diffuser

Correct Answer : Option (B) :   Ideal isentropic diffuser

What is the ratio of throat area of diffuser to nozzle in supersonic wind tunnel with flow at Mach 2.7?
A)
0.4236
B)
0.8338
C)
1.199
D)
2.36

Correct Answer : Option (D) :   2.36

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