대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제38권7호
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  • Pages.581-588
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  • 2014
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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원통-다관형 열교환기의 다관측 입출구 유동 특성의 실험적 연구

Experimental Study of Inlet/Outlet Flow Characteristics in Tube-side of Shell and Tube Heat Exchanger

  • 도흔승 (경상대학교 대학원 기계항공공학부) ;
  • 왕개 (경상대학교 항공기부품기술연구소) ;
  • 박승하 (동화엔텍(주)) ;
  • 김형범 (경상대학교 대학원 기계항공공학부)
  • Tu, Xin Cheng (Grad. School of Mechanical and Aerospace Engineering, Gyeongsang Nat'l Univ.) ;
  • Wang, Kai (Res. Center for Aircraft Parts Tech., Gyeongsang Nat'l Univ.) ;
  • Park, Seung-Ha (Donghwa Entec Co. Ltd.) ;
  • Kim, Hyoung-Bum (Grad. School of Mechanical and Aerospace Engineering, Gyeongsang Nat'l Univ.)
  • 투고 : 2014.01.23
  • 심사 : 2014.04.21
  • 발행 : 2014.07.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 원통-다관형 열교환기의 다관측 유량의 분배도 향상을 위해 다공성 배플 유무에 따른 입구 및 출구부의 유동 특성을 실험적으로 연구하였다. 원통 및 다관측 유량의 분배성능은 원통-다관형 열교환기의 성능에 직간접적인 영향을 준다. 실험 연구를 위하여 원형 크기의 1/3로 축소한 실험 모델을 제작하였고, 60, 80, 90 LPM의 유량 조건에서 다공성 배플의 유무에 따른 다관측의 분배 성능을 입자화상속도기법을 이용한 입구 및 출구부의 속도장 측정을 통해 확인하였다. 연구로부터 절대 불균일 분배도를 계산하여 정량적으로 다공성 배플이 유량의 분배도에 주는 영향을 확인하였다. 측정 결과로부터 유량에 상관없이 배플을 설치하였을 경우 74%의 절대 불균일 분배도의 감소 효과를 가졌다.

The inlet/outlet flow in the tube-side of the shell and tube heat exchanger was experimentally measured to investigate the effect of the porous baffle on uniform flow distribution. A 1/3rd scale-downed model of a heat exchanger was used and particle image velocimetry was applied for measuring the instantaneous velocity vector fields. The absolute errors in the flow rate were calculated and compared for the tube-side with and without the porous baffle, by varying the flow rate from 60 to 90 LPM. The results revealed that the porous baffle can improve flow uniformity and reduce the absolute error in the flow rate of the model with the baffle by about 74%, compared to that without the baffle. This result can be used for improving the performance and design of the shell and tube heat exchanger.

키워드

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