What is the role of the diffuser?

A)
Increase the flow velocity inside test section
B)
Decrease the flow velocity inside the test section
C)
Increase the flow velocity after test section
D)
Decrease the flow velocity after test section

Correct Answer :   Decrease the flow velocity after test section

Explanation : Diffuser is a duct used mostly in the subsonic wind tunnel in order to slow down the high flow velocity post test section to a lower velocity at the diffuser’s exit.

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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