Affiliation:
1. 1Bundeswehr University Munich, Werner-Heisenberg-Weg 39, Neubiberg, 85577, Germany
Abstract
Five-hole-probes are common use in turbomachinery flow investigations, even though, inserting a probe into a flow field inevitably induces perturbations to the flow which can falsify the measurement results, especially when exposed to transonic flows. The objective of the investigations presented here is to evaluate the Mach number measurements of a five-hole-probe (5HP) in the wake flow of a transonic turbine cascade at engine relevant Reynolds numbers by comparing them to the results of particle image velocimetry (PIV). Furthermore, PIV measurements were performed with inserted probe to investigate the influence of the probe on the wake flow field. Together with a sensitivity study of 5HP measurements in flow regimes close to Ma = 1, the results demonstrate how the measurement uncertainty can be improved in high subsonic flow regimes.
Funder
The research leading to this paper was funded by the AG Turbo, Germany, in cooperation with the MTU Aero Engines AG, Germany, and is part of the COOREFLEX-turbo joint project.
Publisher
Global Power and Propulsion Society
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