한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2006년도 추계 학술대회논문집
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- Pages.93-96
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- 2006
판형 열교환기의 맥동유동에 의한 열전달 향상에 관한 수치해석연구
A NUMERICAL STUDY ON HEAT TRANSFER ENHANCEMENT BY PULSATILE FLOW IN A PLATE HEAT EXCHANGER
- 발행 : 2006.10.13
초록
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.