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Which of these scenarios will lead to formation of vorticity?(a) Flow behind curved shock wave(b) Flow over a sharp wedge(c) Two – dimensional nozzle flow(d) Flow over a slender bodyI got this question during a job interview.The question is from Irrotational Flow topic in portion Velocity Potential Equation of Aerodynamics

Answer»

Correct answer is (a) Flow BEHIND curved shock wave

For explanation I would say: The flow within the boundary LAYER and behind curved shock wave is a rotational flow as the curl of velocity vector is not equal to zero. But, flow over a WEDGE, cone, in a two – dimensional NOZZLE flow and over a slender body is irrotational since the curl of velocity vector is zero.



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