Comparison of Single Hole, Two Hole and Four Hole Probes for Three-Dimensional Flow Measurements

Abstract

The present paper compares calibration curves and sensitivity curves of calibration coefficients of a four hole probe, two-hole probe and single hole probe for three dimensional flow measurements. A 2.54 mm hemispherical cantilever four hole probe is calibrated in the yaw and pitch angle range of -60° to 60° and -50° to 30° at an interval of 5°. This calibration data is used to calculate calibration coefficients and calibration and sensitivity curves of calibration coefficients for the four hole, two-hole and single hole probes. From these curves the two hole probe is identified as the best configuration for three dimensional flow measurements.