EXPERIMENTAL RESEARCH AND FIELD SYNERGY ANALYSIS OF FLOW AND HEAT TRANSFER OUTSIDE A VIBRATORY TUBE

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (5) : 102-105.

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EXPERIMENTAL RESEARCH AND FIELD SYNERGY ANALYSIS OF FLOW AND HEAT TRANSFER OUTSIDE A VIBRATORY TUBE

JIANG Bo1, TIAN Mao-cheng1, LENG Xue-li1, CHENG LIN1, CAO Bing-yang2

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Abstract

Experimental research and numerical simulation were carried on to study the flow and heat transfer characteristics outside a circular and an elliptical tube under vibration condition. The orthogonal design method was used to analyze the effect of amplitude, frequency and shape of the tube on heat transfer performance, and a fitting correlation between heat transfer and vibration parameters was obtained in the low-frequency area. Based on the field synergy theory, the dependence of the cosine value of synergy angle on the vibration frequency and amplitude was gained for the near-wall region. It is shown that heat transfer is significantly enhanced while the frequency increases, and rises to a peak value when resonance condition appears. Comparison between different kinds of vibration tubes indicates that heat transfer of elliptical tube with vibrating direction the same as its short axis is the best, round takes second place, and elliptical tube with vibrating direction the same as its long axis is the worst. And it is obtained that tube type is also an important factor affecting the heat transfer under vibrating condition.

Key words

heat transfer enhancement / vibration / dynamic mesh / field synergy / orthogonal design

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JIANG Bo;TIAN Mao-cheng;LENG Xue-li;CHENG LIN;CAO Bing-yang. EXPERIMENTAL RESEARCH AND FIELD SYNERGY ANALYSIS OF FLOW AND HEAT TRANSFER OUTSIDE A VIBRATORY TUBE[J]. Journal of Vibration and Shock, 2009, 28(5): 102-105