타공 통풍형 디스크 브레이크의 열전달 특성에 관한 수치해석
Numerical Analysis on Heat Transfer Characteristics of Ventilated Disc Brake with Holes
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A numerical approach for ventilated disc brake with holes is carried out to investigate the effect of holes on the heat transfer characteristics. The numerical simulation code STAR-CCM+ is utilized to calculate flow and temperature fields with polyhedral meshes. The steady state results show that the holes make the flow velocity on the outer surface increasing, which induce the improvement of convective heat transfer on the outer surface. In the ventilated channel with holes, the convective heat transfer can be reduced due to the inflow of hot air through holes. In unsteady state, the disc has reached the highest temperature in 1,8s since the brake was engaged. The surface of disc without holes has maximum temperatures along the ventilated channels, while the surface temperatures of dis with holes are uniform.
Abstract
A numerical approach for ventilated disc brake with holes is carried out to investigate the effect of holes on the heat transfer characteristics. The numerical simulation code STAR-CCM+ is utilized to calculate flow and temperature fields with polyhedral meshes. The steady state results show that the holes make the flow velocity on the outer surface increasing, which induce the improvement of convective heat transfer on the outer surface. In the ventilated channel with holes, the convective heat transfer can be reduced due to the inflow of hot air through holes. In unsteady state, the disc has reached the highest temperature in 1,8s since the brake was engaged. The surface of disc without holes has maximum temperatures along the ventilated channels, while the surface temperatures of dis with holes are uniform.
참고문헌 (6)
- Flow and Heat Transfer Analysis of a ventilated Disc Brake Rotor Using CFD, SAE 2008-01-0822, "S. M. Reddy", ~ (2008)
- 서영진, "브레이크 디스크 로터 표면 수직 구멍의 영향에 관한 연구", 한국자동차공학회 논문집, 16(1), pp.100~105 (2008), 한국자동차공학회
- 홍윤화, "이종 재질 디스크 브레이크 로터 마찰면 가공 형태에 따른 성능 변화 연구", 한국자동차공학회 논문집, 25(5), pp.581~589 (2017), 한국자동차공학회[DOI]
- 오영민, "루버 각도에 따른 차량용 루버핀 열교환기의 성능에 대한 3차원 수치 해석", 한국기계기술학회지, 19(2), pp.235~241 (2017), 한국기계기술학회[DOI]
- 차선환, "자동차용 루버핀 열교환기의 열전달 및 유동 특성에 관한 수치해석", 한국기계기술학회지, 18(1), pp.18~23 (2016), 한국기계기술학회[DOI]
- A. Belhocine, "Thermal Analysis of both Ventilated and Full Disc Brake Rotors with Frictional Heat Generation", Applied and Computational Mechanics, 8, pp.5~24 (2014)