한국전산유체공학회:학술대회논문집

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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A NUMERICAL STUDY ON HEAT TRANSFER ENHANCEMENT BY PULSATILE FLOW IN A PLATE HEAT EXCHANGER

판형 열교환기의 맥동유동에 의한 열전달 향상에 관한 수치해석연구

  • 이명성 (서강대학교 대학원 기계공학과) ;
  • 허남건 (서강대학교 기계공학과) ;
  • 강병하 (국민대학교 기계공학과)
  • Published : 2006.10.13
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Abstract

The heat transfer enhancement by pulsatile flow in the plate heat exchanger has been investigated numerically in the present study. The numerical study was performed in the range of the mass flux from 0.04 to 0.12 kg/s. The results showed that the pulsatile flow produces resonating vortex shedding at the groove sharp edges and a strong transient vortex rotation within the grooved channels. As a result, the mixing between the trapped volume in the grooved cavity and the main stream was enhanced. Good agreements between the predictions and measured data are obtained in steady flow. And the heat transfer of pulsatile flow is about 2.4 times than steady flow when frequency is 10 Hz and the mass flux of cold side is 0.04 kg/s.

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