Abstract

Various types of electrodiffusional wall shear stress and velocity probes have been suggested in the last years. Most attention has been paid to probes consisting of three electrodes which allow detailed information on the velocity field to be obtained. A three-segmented circular wall shear stress probe was developed in [1, 2]. A triple-split velocity probe was suggested in [3]. To study the detailed fine structure of the flow velocity miniature probes are needed to make possible the detection of high-frequency fluctuations without accounting for the probe frequency response. A small sized probe may also be of importance in measurements in gas-liquid flows with small gas bubbles. A design of a two-component liquid velocity probe which satisfies these requirements was suggested in [4-6]. This was a V-shaped velocity probe similar to an X-type cross hot wire probe [7]. The development of an analogous probe for a three-dimensional flow is presented in this paper.

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