JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (5): 21-25.

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Experimental research on heat transfer enhancement characteristics of  a new type of flow-induced elastic tube bundle

TIAN Mao-cheng1, JIANG Bo2, LENG Xue-li1, CHENG lin1   

  1. 1. School of Energy Source and Power Engineering, Shandong University, Jinan 250061, China;
    2. Shandong Electric Power Research Institute, Jinan 250061, China
  • Received:2011-08-20 Online:2011-10-16 Published:2011-08-20

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Abstract:

Comprehensive heat transfer experimental platform was set up to investigate the heat transfer characteristics of a new type elastic tube bundle under different experimental conditions. In the experiment, variations of the external, internal and overall heat transfer coefficients with Reynolds number were obtained. The experimental results show that the average convective heat transfer coefficient outside the tube for the new type elastic tube bundle is 3 times more than that of the stationary tube bundle at the same Reynolds numbers, which indicates a significant heat transfer enhancement. From the comparison of experimental results under different conditions, it can be conclude that the best heat transfer performance can be obtained for the steamwater heat transfer, which is better than that of the waterwater heat transfer, and the constant heat flux heat transfer exhibits the poorest performance. The reason is that the fluid medium inside the tube has great influence on vibration characteristics of the new type elastic tube bundle and the intensification of the tube bundle vibration leads to the enhancement of heat transfer performance. 

Key words: vibration, heat transfer enhancement, elastic tube bundle, heat exchanger

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