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In a wind tunnel, the section with minimum area is called as __________

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In a wind tunnel, the section with minimum area is called as __________

(a) exit

(b) nozzle

(c) inlet

(d) throat

The question was asked in class test.

My doubt is from Incompressible Flow in Duct topic in division Inviscid & Incompressible Flow of Aerodynamics

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The correct option is (d) throat

To explain: When the flow enters the wind tunnel (convergent-divergent) with a velocity V1 and pressure P1. The velocity increases and the pressure decreases at the minimum area section called the throat. Pressure is minimum at the throat.

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