Heat transfer to air from a yawed cylinder

An experimental study designed to investigate heat transfer to air from a yawed cylinder is described. Measurements were made at Reynolds numbers of 34,000 and 106,000, and yaws varied from cross flow (beta = 0 deg) to 60 deg. The independence principle is found to be valid for heat transfer at the stagnation line and in the laminar boundary layer. Although this principle would not be expected to extend to the wake, the local heat transfer to the wake is not greatly affected by yaw for beta not greater than 40 deg. The heat transfer results can be explained in terms of a secondary vortex located downstream of an initial separation point and followed by a primary eddy. For high yaws and high normal Reynolds numbers, the heat transfer is similar to that which occurs in cross flow approaching critical flow.