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The trends of velocity change in a duct for both subsonic and supersonic flow are identical.

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The trends of velocity change in a duct for both subsonic and supersonic flow are identical.

(a) True

(b) False

I got this question by my college professor while I was bunking the class.

My doubt stems from Area-Velocity Relation in chapter Quasi-One-Dimensional Flow of Aerodynamics

1 Answer

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Best answer
Right option is (b) False

Explanation: For a flow in a duct, both supersonic and subsonic flows show opposite trends. For a subsonic flow (M < 1), the velocity increases in a convergent duct and decreases in the divergent duct. On the other hand, for a supersonic flow (M > 1), the flow increases in a divergent duct and decreases in the convergent duct.

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