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What is the role of the diffuser?(a) Increase the flow velocity after test section(b) Decrease the flow velocity after test section(c) Increase the flow velocity inside test section(d) Decrease the flow velocity inside the test sectionThe question was posed to me by my school principal while I was bunking the class.I'd like to ask this question from Quasi-One-Dimensional Flow Diffusers topic in division Quasi-One-Dimensional Flow of Aerodynamics

Answer»

Right answer is (b) Decrease the flow velocity after test section

The EXPLANATION is: Diffuser is a duct used mostly in the supersonic wind tunnel in order to slow down the HIGH flow velocity post test section to a lower velocity at the diffuser’s EXIT before EXHAUSTING it to the atmosphere.



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