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For incompressible flow, Cp is expressed only in terms of ____________(a) pressure(b) density(c) temperature(d) velocityI have been asked this question in semester exam.My question is taken from Pressure Coefficient in chapter Inviscid & Incompressible Flow of Aerodynamics |
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Answer» CORRECT option is (d) VELOCITY Explanation: In incompressible flow, the PRESSURE and velocity at two different points can be given by- P1+0.5*ρ*V1^2 = P2+0.5*ρ*V2^2 From here we get, P2-P1 = 0.5*ρ (V1^2– V2^2) Hence, CP = (P2-P1)/q Where q-dynamic pressure On solving the above equation we get, Cp = 1 – (V2/ V1)^2. |
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