DOI QR코드

DOI QR Code

A NUMERICAL STUDY ON THE CONJUGATE HEAT TRANSFER OF AN OIL COOLER WITH OFFSET STRIP FINS FOR VARIOUS-FLOW RATES

오일의 유량 변화와 오프셋 스트립 휜을 고려한 오일쿨러의 복합열전달 해석

  • Park, S.W. (Dept. of Mechanical Engineering, Graduate School of Industry, Seoul Nat'l Univ. of Science and Technology) ;
  • Choi, H.G. (Dept. of Mechanical/Automotive Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 박서원 (서울과학기술대학교 산업대학원 기계공학과) ;
  • 최형권 (서울과학기술대학교 기계자동차공학부)
  • Received : 2013.11.22
  • Accepted : 2014.02.18
  • Published : 2014.03.31

Abstract

Conjugate heat transfer of an automotive oil cooler with offset-strip fins was numerically investigated to predict the performance of the oil cooler for various flow-rates. The simulations were conducted by directly modeling offset-strip fins with unstructured meshes. The incompressible Navier-Stokes equations coupled with energy equation were used for the present simulations. Heat transfer characteristics of the oil cooler was compared well with experimental results and the errors were approximately within 5 percents. It was found that the performance of the oil cooler increased as the flow-rate increased up to the flow-rate of 12 L/min, but the performance seemed to be saturated beyond a critical flow-rate, which was estimated as 15 L/min. Furthermore, it was confirmed that compared to the performance without fins, that of the oil cooler with offset-strip fins was increased by about 75 percents.

Keywords

References

  1. 2011, Lee, S.W., "A Numerical analysis for Optimum Design of an Automotive Oil Cooler," Dept. of mechanical Engineering Graduate school, Sogang University.
  2. 1985, Suzuki, K., Hirai, E. and Miyake, T., "Numerical and Experimental Studies on a Two-Dimensional Model of an Offset-Strip-Fin Type Compact Heat Exchanger used at Low Reynolds Number," Int. J. Heat Mass Transfer, Vol.28. No.4, pp.823-836. https://doi.org/10.1016/0017-9310(85)90232-7
  3. 1964, Kays, W.M. and London, A.L., Compact Heat Exchangers, McGraw-Hill, USA.
  4. 1975, Wieting, A.R., "Empirical Correlations for Heat Transfer and Flow Friction Characteristics of Offet Fin Plate Heat Exchangers," J. of Heat Transfer, Vol.97, p.488. https://doi.org/10.1115/1.3450412
  5. 1980, Patankar, S.V., Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corporation, pp.147-118.
  6. 2008, Jang, M.S., Kim, J.W. and Jung, B.Y., "The performance study on cooling fin shape of Car Auto-transmission oil cooler," KASE08-S0164, pp.991-998.
  7. 2006, Park, S.W., "Development of a Semi-Microscopic Numerical analysis Method for an Automotive Heat Exchanger," Dept. of mechanical Engineering. Graduate school, Sogang University.
  8. 2010, Hoe, J.N., Kim, J.H., Son, Y.S., and Shin, J.Y., "Numerical Analysis on the Heat Transfer and Pressure Drop Characteristics of a Channel with Pin-fin Structure," KSME, pp.224-231.
  9. 2001, Yang, D.I., "A Study on the Heat Transfer Characteristics of Oil Flow over Offset Strip Fins," SAREK, Vol.13, No.11, pp.1134-1140.
  10. 2011, Park, C.H., "The Experimental Approach for the Study on the Optimal Fluid Channel of the Oil Cooler for Automobile," Dept. of Mechanical Engineering, Graduate School, Kum-oh National Instityte of Technology.
  11. 1995, Shih, T.-H., Liou, W.W., Shabbir, A. and Zhu, J.A., "A New k-$\varepsilon$ Eddy-Viscosity Model for High Reynolds Number Turbulent FLows Model Development and Validation," Computer Fluids, Vol.24, No.3, pp.227-238. https://doi.org/10.1016/0045-7930(94)00032-T
  12. 2005, Peric, M. and Ferguson, S., "The Advantage of polyhedral," CD-adapco.