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Endoscopic PIV measurements in a low pressure turbine rig

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Abstract

Particle-Image-Velocimetry (PIV) is a useful way to acquire information about the flow in turbomachinery. Several premises have to be fulfilled to achieve high-quality data, for example, optical access, low vibrations and low reflections. However, not all test facilities comply with these requirements. If there is no optical access to the test area, measurements cannot be performed. The use of borescopic optics is a possible solution to this issue, as the access required is very small. Several different techniques can be used to measure the three components of the velocity vector, one of which is Stereo-PIV. These techniques require either large optical access from several viewing angles or highly complex setups. Orthogonal light sheet orientations in combination with borescopic optics using Planar-PIV can deliver sufficient information about the flow. This study will show the feasibility of such an approach in an enclosed test area, such as the interblade space in a Low-Pressure-Turbine-Rig. The results from PIV will be compared with data collected with conventional techniques, such as the Five-Hole-Probe and the 2-component Hot-Wire-Anemometry. An analysis of time- and phase-averaged data will be performed.

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Acknowledgments

The project was sponsored by the Deutsche Forschungsgemeinschaft (German Research Foundation) via the Graduate School #1344 Unsteady System Modelling of Aircraft Engines. The suggestions made by the reviewers are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Gas Turbines and Aerospace Propulsion, Technische Universität Darmstadt, Petersenstr. 30, 64287, Darmstadt, Germany

    Martin Kegalj & Heinz-Peter Schiffer

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  1. Martin Kegalj
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  2. Heinz-Peter Schiffer
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Correspondence to Martin Kegalj.

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Kegalj, M., Schiffer, HP. Endoscopic PIV measurements in a low pressure turbine rig. Exp Fluids 47, 689–705 (2009). https://doi.org/10.1007/s00348-009-0712-8

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  • DOI: https://doi.org/10.1007/s00348-009-0712-8

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