关于在亚音速高马赫数跨音速涡轮叶栅尾流中应用五孔探针测量的挑战

2019/08/05   下载量: 0

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应用领域 航空航天
检测样本 航天
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采用德国LaVision的Imager Pro X4M CCD相机和蔡司ZEISS 50mm f/2 Makro 镜头,测量了亚音速高马赫数跨音速涡轮叶栅尾流的2D2C速度矢量场并和五孔探针的测量结果进行了对比分析。

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     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.

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