Triple hot-wire technique for simultaneous measurements of instantaneous velocity components in turbulent flows

Publisher Website
Google Scholar
Abstract
A triple hot-wire method is proposed for measuring the instantaneous velocity vector of turbulent flows. The evaluation method is based on the concept of an effective cooling velocity. The instantaneous velocity components are calculated iteratively from the measured cooling velocities of the three sensors by a modified Newton algorithm. The three wires are orientated such that the probe has superior qualifications for analysing the Reynolds stress tensor. The probe has been manufactured locally from three commercially available subminiature hot-wire probes in such a way that the sensors have an effective sample of only 1.8 mm diameter. Qualification tests in highly turbulent flows have shown that serious inaccuracy occurs if the mean flow direction and the probe axis are misaligned by more than 15 degrees .

This publication has 6 references indexed in Scilit: