Investigation of the Reynolds number effect on two pressure probes for measurements in turbomachines
Abstract
The paper presents results of a calibration of two pressure probes (a fivehole cone probe and a combined probe insensitive to flow direction) for flow analysis in turbomachines in the range of Re numbers (based on the probe diameter) between 1000 and 30,000 and at zero incidence at very low velocities (incompressible flow). The effect of the Re number on the totalstatic calibration factor of the cone probe at zero incidence was found to be relatively small. However, large variations of the same factor with Re number were observed for the combined probe, especially at Re less than 3000. It is also shown that comparisons with calculations based on the conversion formulas of BroichhausenKauke for the cone probe do not give completely satisfying results for large Re variations.
 Publication:

IN: Measuring techniques for transonic and supersonic flow in cascades and turbomachines; Proceedings of the Seventh Symposium
 Pub Date:
 1984
 Bibcode:
 1984mtts.proc...15N
 Keywords:

 Calibrating;
 Flow Measurement;
 Pressure Sensors;
 Reynolds Number;
 Turbomachinery;
 Conical Bodies;
 Incompressible Flow;
 Manometers;
 Microinstrumentation;
 Small Perturbation Flow;
 Wind Tunnel Tests;
 Fluid Mechanics and Heat Transfer