Question

Question 3: --うつc A flat plate is inserted with its edge at x = 0 in a uniform flow coming at velocity U parallel to the plate from the region where x < 0. If using a cubic approximation to the Blasius profile: u U(2n- n) with n-y/o, in which o(x)- Ax/(Re.) is the boundary layer thickness, 1. What should the relationship be between this δ(x) and the δ99-5.0d(Re.)12 in the Blasius profile, in order to yield the same drag? (i.e., what should A be equal to?) Find the u and v velocity components (in the x and y directions) at the location where y=84 and Re, = 10,000. 2. If transition to turbulent flow occurs for a Reynolds number Re, 2 x 10s what is the drag on the plate up to that location?

Answer 1

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