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    • Research on the Influencing Factors of the Oscillation Flow and Heat Transfer Characteristics of Nanofluids in Cooling Gallery of Piston
    DOI：10.13949/j.cnki.nrjgc.2022.03.001
    Key Words:piston  cooling gallery  nanofluid  oscillating heat transfer  heattransfer coefficient
    Author NameAffiliationE-mail
    XIAO Jie* Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China 2210784080@qq.com 
    DENG Xiwen* Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China
    Yunnan Key Laboratory of Plateau Emissions of Internal Combustion Engines， Kunming Yunnei Power Co.， Ltd.， Kunming 650200， China     		xixiwen@126.com 
    XIE Guangyi Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China  
    WANG Jinkun Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China  
    LEI Jilin Yunnan Province Key Laboratory of Internal Combustion Engines， Kunming University of Science and Technology， Kunming 650500， China
    Yunnan Key Laboratory of Plateau Emissions of Internal Combustion Engines， Kunming Yunnei Power Co.， Ltd.， Kunming 650200， China     		 
    ZHU Ruidong Yunnan Key Laboratory of Plateau Emissions of Internal Combustion Engines， Kunming Yunnei Power Co.， Ltd.， Kunming 650200， China  
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    Abstract:Using the method of computational fluid dynamics， the oscillating heat transfer ability of three nano-oils containing Al2O3， CuO， and SiO2 at the volume fractions of 1%， 3%， and 5% relative to the traditional engine oil and the oil flow law in the cooling gallery were studied. Results showed that the addition of nanoparticles changed the physical parameters of the fluid. Compared with traditional engine oils， nanofluids had better heat transfer effects. With the increase of the volume fraction of nanofluids， the heat transfer coefficient of the cooling gallery increased， while the transient distribution of the transient oil in the cooling gallery and the oil filling rate were ravely influenced. The viscosity， density， thermal conductivity and specific heat capacity of the nanofluid could affect the heat transfer performance of the cooling gallery. The increase of density would make the impact of the fluid on the wall stronger， thereby enhancing the heat exchange capacity of the cooling gallery. When the volume fraction was 5%， the heat transfer coefficient of CuO nano engine oil was 8.2% and 14.6% higher than that of Al2O3 and SiO2 nano engine oil， respectively.
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