Flow and heat transfer characteristics in a pre-swirl rotor-stator cavity

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作者：
Department of Energy and Power Engineering, Tsinghua University, Beijing, China [1 ]
不详 [2 ]
AL
35899, United States
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来源：
Int. J. Therm. Sci. |
关键词：
Reynolds number - Heat convection - Jets - Stators;
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摘要：
The present study investigates flow and heat transfer characteristics in a rotor-stator pre-swirl system. Considered are rotational Reynolds numbers ReФ ranging from 3.4 × 105 to 6.8 × 105, with jet Reynolds numbers Rew of approximately 8.8 × 104 to 3.81 × 105, and associated turbulent flow parameter λT = Cw/ReФ0.8 varying from 0 to 0.4. Experimentally-measured and numerically-predicted results illustrate the combined and separate influences of jet impingement and rotor entrainment, as they affect and govern flow and heat transfer characteristics within the cavity. These results show that the relative strength of the two effects varies with ReФ and Rew, with similar performance for flow conditions with similar magnitudes of the turbulent flow parameter λT. When 0T T > 0.27, the effects of rotor entrainment are less pronounced. © 2021 Elsevier Masson SAS
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