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나선형 홈을 가진 브레이크 유로 내에서의 국소 열전달 측정 및 열 유동 해석
이대희(D. H. Lee),박성봉(S. B. Park),임창율(C. Y. Lim),김흥섭(H. S. Kim),이관수(K. S. Lee) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.6
A ventilated disc brake having spirally fluted surface has been proposed to improve the thermal judder by way of heat transfer enhancement. The local heat transfer coefficients were measured in the flow passage of disc brake. These measured local heat transfer data were utilized to do the finite element numerical analysis which predicts the maximum temperatures on the disc brake. The results show that the maximum temperatures on the disc surface with spirally fluted surface are approximately 26.6% lower than those without them.
나선형 홈을 가진 벤틸레이티드 디스크 브레이크 유로 내에서의 열적 성능 해석
이대근(D.K. Lee),차윤석(Y.S. Cha),이준식(J.S. Lee),박성봉(S.B. Park),이대희(D.H. Lee) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
Effects of the flow passage geometry in ventilated disc brake on thermal performance have been investigated. The heat transfer measurements in the flow passage having both flat surface and spirally grooved surface geometries inside the automobile disc brake were made. Liquid Crystal-shroud transient technique was used to measure the local heat transfer coefficients. These measured local heat transfer data were utilized to numerically predict the temperature distributions as well as thermal stresses on the disc brake. The results show that the maximum temperatures on the disc brake with spirally grooved surface are approximately 44.3% lower than those with the flat surface. Thermal stresses with spirally grooved surface in the outlet region of the flow passage are approximately 2.5 times as large as those with the flat surface.