Coupling characteristics of low Reynolds number pulsating flow and flexible wall in triangular channel

被引：0
|
作者：
Huang Q. [1 ,2 ]
Zhang X. [1 ]
Mi X. [1 ]
Zhou K. [1 ]
Zhong Y. [2 ]
机构：
[1] Zhejiang Cosin CSP Technology Research Institute Co., Ltd., Huzhou
[2] Institute of Energy and Power Engineering, Zhejiang University of Technology, Hangzhou
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 05期
关键词：
Drag reduction; Flexible wall; Flow; Heat transfer; Pulsating flow;
D O I：
10.11949/0438-1157.20211540
中图分类号：
学科分类号：
摘要：
Using water as the working fluid, the coupling characteristics of low Reynolds number pulsating flow and flexible wall in triangular channel were experimentally studied. Experiments of heat transfer and flow resistance were carried out in detail under the impacts of Womersley number (W), pulsating amplitude (A) and rigidity (Kb). Moreover, the dynamic response relation between flexible wall and pulsating flow was investigated to illuminate the effects of flexible wall deformation and vibration frequency on heat transfer and flow resistance. The results indicate that the dual effects of heat transfer enhancement and drag reduction are achieved by pulsating flow in the triangular channel with flexible wall, but heat transfer efficiency increasing by 0-50% is relatively weak. Besides, the reason why flow resistance and enhanced heat transfer efficiency decease is that deformed flexible wall results in increasing the cross-sectional area of the flexible wall (the fluid velocity decreases), and the pulsation energy is weakened with the increase of W and A. Furthermore, the reduction of enhanced heat transfer effect cased by flexible wall vibration and deformation gradually tends to be dominant with the increase of W. The reduction of flow resistance is mainly caused by the deformation of the flexible wall, and the flexible wall vibration frequency has less effect on the energy dissipation of pulsating flow. © 2022, Editorial Board of CIESC Journal. All right reserved.
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页码：1964 / 1973
页数：9
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