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What is the minimum area of a duct known as?

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in Aerodynamics by (773k points)
What is the minimum area of a duct known as?

(a) Throat

(b) Minimum area duct

(c) Convergent duct

(d) Divergent duct

The question was asked in final exam.

Enquiry is from Area-Velocity Relation topic in portion Quasi-One-Dimensional Flow of Aerodynamics

1 Answer

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Best answer
Correct option is (a) Throat

To elaborate: In a nozzle which is designed to achieve supersonic speed, there’s both converging and diverging section which is used to accelerate the flow. There is a minimum area point in the duct where Mach number reaches 1. This minimum area place in a duct is known as the throat.

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