Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (4): 40502-040502.doi: 10.11889/j.0253-3219.2016.hjs.39.040502

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles     Next Articles

Investigation of the onset of sub-cooled boiling prediction correlation

LI Bicheng1, HE Danhui2, GUO Yun2   

  1. 1 China National Nuclear Power Co., Ltd., Xingcheng 125100, China;
    2 School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
  • Received:2015-12-08 Revised:2016-01-30 Online:2016-04-10 Published:2016-04-08
  • Supported by:

    Supported by National Natural Science Youth Foundation of China(No.11305169)

Abstract:

Background: The predicted superheat degree of the onset of boiling point is always lower than that of experiment. Hence, a new model is necessary for the accuracy prediction in engineering calculation. Purpose: This study aims to investigate the reason of deviation and bring out a new prediction model, which can be used in engineering analysis directly and simply. Methods: Based on the vapor growth model and the viewpoint of force balance, the onset of fluid vaporization(OFV) and onset of nucleate boiling(ONB) points are separated. Thereby a new analysis model is built and combined with phenomenological analysis method. Results: The formulas to predict the bubble radius and the relationship of the wall superheat degree and heat flux at OFV and ONB are obtained. Compared with the existing experimental data, the error distribution is more rational. Conclusion: The presented model can improve predicted results for distinguishing OFV and ONB under the limitation of experimental measuring equipment. However, more experimental data validation is necessary.

Key words: Bubble radius, ONB, OFV

CLC Number: 

  • TL331