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Application of Phase-Locked PIV Technique to the Measurements of Flow Field in a Turbine Stage

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Abstract

For the purpose of improving turbine efficiency, a detailed investigation of flow field near rim seal region in the main annulus is absolutely essential. Purge flow egressed from the seal gap penetrates the hub boundary layer and travels along with the secondary flow in the main path. The propagation of the purge flow and its influence on the turbine performance are crucial and cannot be neglected in the aerodynamic and thermal design. In addition, the interaction of vane wake and blade potential field also has a significant impact on the turbine stage performance. In this study, flow field between inlet guide vanes (IGV) and rotor blades was experimentally investigated at specific positions with the help of a two-dimensional particle image velocimetry (2-D PIV). A phase-locking technique was also employed to capture the images of flow field at different rotor blade positions. Data acquired characterizes the impact of emergent purge flow on the flow structures within the main annulus. The impacts of vane wake and blade potential field on the flow fields were analyzed through characterizations provided by the time-averaged field results. Finally, flow fields at different main flow rates and under different seal gap widths were also presented and assessed.

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Acknowledgement

This investigation was funded by the National Natural Science Foundation of China (Grant No. 51776011) and National Science and Technology Major Project (2017-V-0016-0068).

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Authors and Affiliations

  1. School of Energy and Power Engineering, Beihang University, Bei**g, 100191, China

    Zhenyang Zhang & Hongwei Ma

  2. TELLHOW SCI-TECH CO., LTD., Nanchang, 330096, China

    Zhenyang Zhang

  3. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, Beihang University, Bei**g, 100191, China

    Hongwei Ma

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  1. Zhenyang Zhang
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  2. Hongwei Ma
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Correspondence to Hongwei Ma.

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Zhang, Z., Ma, H. Application of Phase-Locked PIV Technique to the Measurements of Flow Field in a Turbine Stage. J. Therm. Sci. 29, 784–792 (2020). https://doi.org/10.1007/s11630-020-1215-4

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  • DOI: https://doi.org/10.1007/s11630-020-1215-4

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