Publicou 4 edições por ano
ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336
Indexed in
THERMAL AND FLUID CHARACTERISTICS OF SINGLE FIN HEAT SINK WITH A PIEZOELECTRIC COOLING FAN
RESUMO
This paper presents a comparative investigation of numerical flow simulations and the experimental data of a piezoelectric fan by particle image velocimetry. It investigates the fluid mechanics of a piezoelectric fan operating in its vibration frequency mode. The experimental results show that the optimal driving frequency for the piezoelectric fan is 60 Hz. At this frequency, the thin blade of the piezoelectric fan reaches its maximum vibration amplitude. The flow field visualization obtained in the experiments shows that the amplitude of the fan blade directly affects flow velocity. The vortex structures exhibit irregular motion once they separate from the blade tip. The phase measured PIV results are presented in terms of vorticity and show the formation of a horse shoe vortex. A maximum flow velocity of 1.7 m/s is obtained. It was also observed that the vibrating blade induces a pair of vortices, one clockwise and one counterclockwise. The blade vibration induces a pair of vortices around the blade tip. The blade inhale and propulsion air flow induces a jet-like motion at the tip during a cycle. Its fast blade motion achieves thermal cooling.
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Li Xin-Jun, Tan Xiao-Ming, Zhang Jing-Zhou, Wu Bin-Bin, Chen Wei-Wei, Utilizing piezoelectric fan for heat transfer enhancement on corrugated surfaces, Thermal Science and Engineering Progress, 29, 2022. Crossref
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Li Xinjun, Chen Weiwei, Lu Shihua, Investigation of the characteristics of turbulent flow and heat transfer induced by a vibrating piezoelectric fan on asymmetrical concave surfaces, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 236, 1, 2022. Crossref
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Li Xin-Jun, Zhang Jing-Zhou, Tan Xiao-Ming, Shan Yong, Lu Shi-Hua, Chen Wei-Wei, Experimental and numerical investigations on the thermal performance over corrugated surfaces with different wave shapes induced by piezoelectric fan, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2022. Crossref