An approximate method for the calculation of the incompressible laminar spanwise boundary layer on an infinite uniform yawed cylinder with distributed suction

Abstract

This paper describes an approximate method to calculate the incompressible laminar spanwise boundary layer on an infinite yawed uniform cylinder with distributed suction. The calculation for the chordwise layer is supposed to be known. A similar method to calculate the laminar spanwise layer for a solid boundary is given by Rott and Crabtree, but for a porous boundary with suction no such method is known to the author at present except the one given in this paper. The present method is equally applicable to a solid boundary also. A comparison of the calculation by the present approximate method is made with the exact solutions of the spanwise layer with the chordwise velocity distribution U = Cxmat the edge of the layer, and the agreement is found to be quite satisfactory. Moreover, the method is very simple in operation.