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Modified k-ω model using kinematic vorticity for corner separation in compressor cascades

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Abstract

A new method of modifying the conventional k-ω turbulence model for corner separation is proposed in this paper. The production term in the ω equation is modified using kinematic vorticity considering fluid rotation and deformation in complex geometric boundary conditions. The corner separation flow in linear compressor cascades is calculated using the original k-ω model, the modified k-ω model and the Reynolds stress model (RSM). The numerical results of the modified model are compared with the available experimental data, as well as the corresponding results of the original k-ω model and RSM. In terms of accuracy, the modified model, which significantly improves the performance of the original k-ω model for predicting corner separation, is quite competitive with the RSM. However, the modified model, which has considerably lower computational cost, is more robust than the RSM.

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Authors and Affiliations

  1. National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics, School of Energy and Power Engineering, Beihang University, Beijing, 100191, China

    YangWei Liu, Hao Yan, LiPeng Lu & QiuShi Li

  2. Collaborative Innovation Center of Advanced Aero-Engine, Beihang University, Beijing, 100191, China

    YangWei Liu, Hao Yan, LiPeng Lu & QiuShi Li

  3. Laboratory of Mathematics and Physics, Ecole Centrale de Pékin, Beihang University, Beijing, 100191, China

    Le Fang

  4. Laboratoire de Mécanique des Fluides et d’Acoustique, École Centrale de Lyon, Écully, 69134, France

    Liang Shao

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  1. YangWei Liu
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  2. Hao Yan
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  3. Le Fang
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  4. LiPeng Lu
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  5. QiuShi Li
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Correspondence to Le Fang.

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Liu, Y., Yan, H., Fang, L. et al. Modified k-ω model using kinematic vorticity for corner separation in compressor cascades. Sci. China Technol. Sci. 59, 795–806 (2016). https://doi.org/10.1007/s11431-015-6005-y

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  • DOI: https://doi.org/10.1007/s11431-015-6005-y

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