Effects of angle of attack on the leading edge attachment line

Abstract

The computational results presented show good agreement with existing flight test data. A parametric study on the sensitivity of attachment line location and crossflow profiles to alpha was conducted. For the 20 case, the attachment line is very close to the leading edge. However, for a = 0.00 and 3.670, the outboard attachment point moves much further downstream relative to the inboard attachment point. At different angles-of-attack the boundary layer thickness and stream-wise velocity profiles do not change significantly. There is, however, a significant change in the crossflow velocity profiles with different angles-of-attack. The trends exhibited in the crossflow velocity profiles indicate that as the angle of attack is decreased from 3.670 to 0.00, the maximum crossflow velocity at a fixed location increases.