Hot Wire Anemometer Measurements in Flows Where Direction of Mean Velocity Changes during a Traverse

This paper describes a simple method that allows X-array hot wire measurements to be made in a flow where the direction of the mean velocity changes during a traverse. Such situations are encountered in measurements behind turbulence promoters, flow across curved surfaces, in diffusers, nozzles, and many others. Variations in mean flow direction of up to 55° are allowable without requiring extensive angle calibration at each new measurement point.