On the application of two-dimensional velocity profile to three-dimensional boundary-layer flow

The problem of excessive resultant velocity by using a two-dimensional profile for the streamwise flow coupled with a separate crossflow in three dimensions is addressed. To be consistent with the physics of the boundary layer, it is proposed that the two-dimensional profile be applied to the resultant flow instead of the streamwise flow. An integral boundary-layer procedure based on the new arrangement for determining the vortex-type flow separation is developed. The procedure is applicable to large crossflow conditions in case of high angle of attack. Calculated theoretical results are compared with those obtained using the previous method, which is based on a power-law profile as applied to the streamwise flow, as well as with the available experimental data.