JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2012, Vol. 42 ›› Issue (4): 132-136.

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Experiment and numerical simulation on inherent vibration charact eristics of the new elastic tube bundle

JIANG Bo1, TIAN Mao-cheng2*, HAO Wei-dong1,  LIU Fu-guo1   

  1. 1. Shandong Electric Power Research Institute, Jinan 250002, China;
    2. School of Energy Source and Power Engineering, Shandong University, Jinan 250061, China
  • Received:2012-03-20 Online:2012-08-20 Published:2012-03-20

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Abstract:

An optimizd structure of elastic tube bundle was proposed considering the structure and operating features of the original type. The mechanical properties of the end region of the elastic tube bundle were deduced theoretically, and thorough researches were carried out on the inherent vibration characteristics of the tube bundle by the combinatior experiment  and  numerical simulation. The modes of  the  out-of-plane and inplane vibration, natural frequency of the tube bundle were obtained. The experiment results showed that the bending moment endured in the end section of the new elastic tube bundle was one sixth times less than that of the original tube bundle, which improved the safety property significantly.  The natural frequency was lower than that the original of tube bundle, which make  it easier for the tube bundle to vibrate under the stimulation of external flow. The heat transfer area per unit volume increased by 24.7％ accordingly.

Key words: heat transfer enhancement, vibration, elastic tube bundle, finite element, modal analysis

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