Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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A Theoretical Model of Critical Heat Flux in Flow Boiling at Low Qualities

  • Kim, Ho-Young (Department of Mechanical Engineering, Korea University) ;
  • Kwon, Hyuk-Sung (Examination Bureau 2, Prime Mover Machinery Division Korea Industrial Property Office) ;
  • Hwang, Dae-Hyun (Advanced Reactor Development Division, Korea Atomic Energy Research Institute) ;
  • Kim, Yongchan (Department of Mechanical Engineering, Korea University)
  • Published : 2001.07.01
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Abstract

A new theoretical critical heat flux (CHF) model was developed for the forced convective flow boiling at high pressure, high mass velocity, and low quality. The present model for an intermittent vapor blanket was basically derived from the sublayer dryout theory without including any empirical constant. The vapor blanket velocity was estimated by an axial force balance, and the thickness of vapor blanket was determined by a radial force balance for the Marangoni force and lift force. Based on the comparison of the predicted CHF with the experimental data taken from previous studies, the present CHF model showed satisfactory results with reasonable accuracy.

Keywords

References

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