Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Numerical study on the thermal performance of passively cooled hybrid fins

수동적으로 냉각되는 하이브리드 휜들의 열성능에 대한 수치적 연구

  • Jeon, Mun Soo (Department of Mechanical & Automotive Engineering, Pukyong National University) ;
  • Kim, Kyoung Joon (Department of Mechanical & Automotive Engineering, Pukyong National University)
  • Received : 2013.08.06
  • Accepted : 2013.10.11
  • Published : 2013.11.30
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Abstract

This paper reports numerical study results with respect to the thermal performance of various hybrid fins (HFs) and a pin fin (PF) passively cooled under natural convection state. Investigated HFs are a basic hybrid fin (BHF), a hollow hybrid fin (HHF), and a solid hybrid fin (SHF). CFD models for both HFs and the PF have been developed to explore their thermal performance under various heat dissipations. Thermal performances of fins have been analyzed by quantifying array-based heat transfer coefficients, $h_a$, and mass-based heat transfer coefficients, $h_m$, for each fin. Study results show that $h_a$ of the SHF is 23% greater than that of the PF. $h_m$ of the HHF is found to be even 140% greater than that of the PF, and the HHF is found to be 40% better than the BHF in terms of the mass-based performance, $h_{m{\cdot}}$.

본 논문은 자연대류 상에서 수동적으로 냉각되는 다양한 하이브리드 휜들과 핀 휜의 열성능에 대한 수치연구결과를 보고한다. 연구된 하이브리드 휜들은 basic hybrid fin (BHF), hollow hybrid fin (HHF), solid hybrid fin (SHF) 이다. 다양한 방열율에 대한 HF들과 PF의 열성능을 조사하기 위해 CFD 휜 모델이 개발되었다. 휜들의 열성능은 각각의 휜에 대해 휜 베이스 면적에 대한 열전달계수, $h_a$와 질량에 대한 열전달계수, $h_m$ 을 정량화하여 분석되었다. 연구결과는 SHF의 $h_a$가 PF 보다 23% 더 큼을 보여주고, HHF의 $h_m$은 PF 보다 무려 140% 더 크며, HHF의 질량기반 성능, 즉 $h_m$은 BHF 보다 40% 더 우수함이 밝혀졌다.

Keywords

References

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