Two Probes for the Measurement of the Complete Velocity Vector in Subsonic Flow

Abstract

Two probes which have been developed at the University of Toronto's Institute for Aerospace Studies for the purpose of determining the complete velocity vector in subsonic flow are described. That is, both probes provide the magnitude of the velocity at a point plus the two angles which determine the vector's orientation. The first probe, which also measures static pressure, was developed by K. Dau to determine wake properties behind a blowing wing. It uses a multiple pressure-hole technique. The second probe was originated by K. Dau and D. Surry and experimentally developed by M. McLeod. It is basically a spinning hot-wire probe whose periodic waveform uniquely defines the complete velocity vector.