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论文类型：期刊论文

发表时间：2014-04-03

发表刊物：NUMERICAL HEAT TRANSFER PART A-APPLICATIONS

收录刊物：SCIE、EI、Scopus

卷号：65

期号：4

页面范围：378-400

ISSN号：1040-7782

摘要：Copper and diamond nanoparticles with diameters of 50nm are added into conventional engine oil, respectively, to preparetwo new types of nanofluids, which are further used as the heat transfer medium for the piston cooling gallery. Detailed oil flow and heat transfer processes of copper-oil and diamond-oil nanofluids, with the volume fractions of 1%, 2%, and 3% have been numerically investigated through a coupled VOF/Level-Set method. Research on oil fill ratio (OFR) and heat transfer coefficient (HTC) distributions at different crank angles has been conducted under the engine operation speed of 2000r/min.