한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제19권3호
  • /
  • Pages.130-137
  • /
  • 2011
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  • 1225-6382(pISSN)
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  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

증류수-부동액 혼합 $Al_2O_3$ 나노유체의 열전도도와 점성계수

Thermal Conductivity and Viscosity of Distilled Water/Commercial Coolant Based $Al_2O_3$ Nanofluids

  • 권혜림 (한국항공대학교 항공우주 및 기계공학과) ;
  • 황교식 (한국항공대학교 항공우주 및 기계공학과) ;
  • 장석필 (한국항공대학교 항공우주 및 기계공학부)
  • Kwon, Hey-Lim (Deptartment of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Hwang, Kyo-Sik (Deptartment of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Jang, Seok-Pil (School of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 투고 : 2010.09.29
  • 심사 : 2010.12.07
  • 발행 : 2011.05.01
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초록

Experimental investigations are conducted to figure out the feasibility of $Al_2O_3$ nanofluids as the alternative coolant for car engine. For the purpose, the thermal conductivities and viscosities of water/commercial coolant based $Al_2O_3$ nanofluids with 0.3, 1.0, 2.0 and 3.0 vol. % at temperatures ranging from $25^{\circ}C$ to $35^{\circ}C$ are measured. Thermal conductivities are measured using the transient hot-wire method and also viscosities are measured by Brookfield LVDV-III rheometer. Based on the results, it is shown that thermal conductivity of $Al_2O_3$ nanofluids with 3.0 vol. % is increased about 11% at $35^{\circ}C$ and the increment of viscosity approaches to 84% at shear rate of 600(1/s) and 80% at shear rate of 960(1/s) in the same temperature. with fundamental data for the thermal conductivity and viscosity of the nanofluids, the feasibility of $Al_2O_3$ nanofluids as the alternative coolant for car engine are discussed.

키워드

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