Analyzing Heat Transfer Characteristics of Pulsating Shear Layer under Eddy Motion

Gao Quanjie; Wang Yonglong; Wang Zhaohui

doi:10.13433/j.cnki.1003-8728.20180221

Volume 38 Issue 5

May 2019

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Article Navigation > Mechanical Science and Technology for Aerospace Engineering > 2019 > 38(5): 691-697

Gao Quanjie, Wang Yonglong, Wang Zhaohui. Analyzing Heat Transfer Characteristics of Pulsating Shear Layer under Eddy Motion[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(5): 691-697. doi: 10.13433/j.cnki.1003-8728.20180221

Citation:

Gao Quanjie, Wang Yonglong, Wang Zhaohui. Analyzing Heat Transfer Characteristics of Pulsating Shear Layer under Eddy Motion[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(5): 691-697. doi: 10.13433/j.cnki.1003-8728.20180221

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Analyzing Heat Transfer Characteristics of Pulsating Shear Layer under Eddy Motion

doi: 10.13433/j.cnki.1003-8728.20180221

The Education Ministry Key Laboratory of Metallurgical Equipment and Control, Wuhan University of Science and Technology, Wuhan 430081, China

Received Date: 2018-07-23
Publish Date: 2019-05-05

Abstract

Abstract

Based on the impulse effect of self-excited oscillation, the heat transfer effect of the heat exchanger tube is analyzed. The influence of changes in instantaneous vorticity on the flow field of the downstream flow channel is analyzed with the large eddy simulation numerical calculation method. The transient structure, heat transfer characteristics and resistance characteristics of the downstream flow channel with L^*=d₃/d₂ are analyzed and evaluated with the comprehensive performance evaluation coefficient. The results show that the small vortices dispersed by the collision of the discrete vortex in the shear layer of the vibration cavity move downstream with the edge, thus inducing the new vortex generation. The change of L^* can control the development of the pulsating shear layer. With the increase of L^*, the strength of the stream-wise vortex first increases and then decreases, and the normal vortex gradually develops towards the pipe axis. By regulating L^*, the heat transfer and resistance can be controlled. When 1.4 ≤ L^* ≤ 1.8, the heat transfer efficiency is improved by 45.1% to 56.5%, and the comprehensive performance coefficient is up to 45.4%.
- self-excited oscillation,
- shear layer,
- heat transfer characteristics

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References(16)

References

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