本文內容以計算流體力學為基礎的電腦輔助工程分析，模擬旋轉碟盤受到煞車制動器作用下整個流場散熱的情形，本研究中所使用的數值模擬軟體為美國FLUENT公司所開發的模擬軟體Fluent，研究先利用MRF （Multi-Reference Frame Model）模擬簡單圓盤的熱傳流力問題，並與解析解相驗證以確認軟體的適用性，並熟悉CFD軟體的使用程序，接著針對多種不同幾何設計之煞車碟盤，研究其通風道鰭片形式的不同對速度及溫度分佈的影響，研究結果發現，雖然碟盤的泵浦效應是影響其散熱能力的最主要因素，但是細部的流場結構，例如是否有迴流的影響區域，迴流中心的位置，及迴流大小，都會影響碟盤傳熱的效能。

Disk brake is a very important device to assure automobile safety. The performance of a disk brake depends on the heat dissipation capability, by forced convection of the disk rotor. Poor thermal design of a disk brake can leads to high thermal strains in the disk and braking failure. There is little information in the public domain regarding the convective thermal performance of different disk brake geometries. The aim of this research was to investigate how different rotor designs affect the thermal performance of disk brake rotors. The comparison of thermal performance of different disk brake rotor designs was performed by applying computational fluid dynamics by using the commercial CFD code Fluent. The velocity and temperature fields for various disk designs were obtained numerically and their effects on the thermal performance of the disk rotors were discussed.

【1】http://tech.toyota.com.tw/
【2】Patankar, S. V. , “Numerical Heat Transfer and Fluid Flow,” Hemisphere, Washington, D. C., 1980.
【3】Sparrow, E. M. and Chyu, M. K., “Conjugate Forced Convection Conduction Analysis of Heat Transfer in a Plate Fin,” ASME, Journal of Heat Transfer, Vol. 104, pp. 204-206, 1982.
【4】Ali, A., “A CAE Approach for The Thermal Design of Compact Electronic Enclosures,” Advances in Electronic Packagink, EEP Vol. 19-2, pp. 2131-2136, 1997.
【5】Kubota, M., Hamabe, T., Nakazono, Y., Fukuda, M. and Doi, K., “Development of a lightweight brake disc rotor: a design approach for achieving an optimum thermal, vibration and weight balance,” JSAE Review, v 21, n 3, Jul, 2000, p 349-355.
【6】Wallis, L., Leonardi, E., Milton, B. and Joseph, Phillip., “Air flow and heat transfer in ventilated disc brake rotors with diamond and tear-drop pillars,” Numerical Heat Transfer, Part A, Applications, v 41, n 6-7, May, 2002, p 643-655.
【7】Johnson, D. A., Sperandei, B. A., Gilbert, R., “Analysis of the flow through a vented automotive brake rotor,” Journal of Fluids Engineering, Transactions of the ASME, v 125, n 6, November, 2003, p 979-986
【8】林俊澤, 煞車碟盤之熱分析, 國立成功大學碩士論文, 1994.
【9】楊焜琅, 煞車碟盤之振動分析, 國立成功大學碩士論文, 1995.
【10】陳子南, 碟式煞車之接觸與熱分析, 國立成功大學碩士論文, 1996.
【11】賴志忠, 應用有限元素法於煞車圓盤的振動分析, 國立台灣大學碩士論文,1997
【12】王福軍, 計算流體動力學分析－CFD軟件原理與應用, 清華大學出版社, 北京, 2004.
【13】Schlichting, and Hermann, “Boundary Layer,” McGraw-Hill, New York, 1979, 7th ed.
【14】Cobb, E. C. and Saunders, O. A., “Heat Transfer from a Rotating Disk,” Proc. Roy. Soc. 236（Series A）, P. 343, 1956.
【15】Dorfman, L. A., “Hydrodynamic Resistance and the Heat Loss of Rotating Solids”, pp. 95-97, Oliver and Boyd, Lonon, 1963.
【16】Sisson, A. E., “Thermal Analysis of Vented Brake Rotors,” SAE Techical Paper 780352, 1978.
【17】Limpart, R., “Brake Design and Safety,” pp. 113-117, Society of Automotive Engineers, Washington, DC, 1992.
【18】Limpart, R., “Cooling Analysis of Disk Brake Rotors,” SAE Techical Paper 751014, 1975.
【19】Versteeg, H. K., and Malalasekera, W., “An Introduction to Computational Fluid Dynamics The Finite Volume Method,” Longman Group Ltd, 1995.
【20】Massey, B. S., “Mechanics of Fluids,” 6th ed., pp. 534-538, Chapman and Hall, London, 1989.
【21】FLUENT 6.2 USER’S GUIDE, 2005.