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For an incompressible flow, if local area velocity decreases then, the dynamic pressure will ________

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in Aircraft Design by (701k points)
For an incompressible flow, if local area velocity decreases then, the dynamic pressure will ________

(a) decrease

(b) increase

(c) constant

(d) independent of velocity

This question was posed to me in final exam.

I'd like to ask this question from Aerodynamic Forces topic in division Aerodynamics of Aircraft Design

1 Answer

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Best answer
The correct option is (a) decrease

To explain: Dynamic pressure is defined as the product of density and square of velocity and 0.5. It is pressure exerted by fluid due to motion and the fluid flow. As mentioned, dynamic pressure is proportional to square of velocity and hence, if velocity decreases then, the value of corresponding dynamic pressure is reduced as well.

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