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论文类型：期刊论文

发表时间：2015-01-01

发表刊物：MICRO & NANO LETTERS

收录刊物：SCIE、EI、Scopus

卷号：10

期号：1

页面范围：28-33

ISSN号：1750-0443

关键字：cooling; nanoparticles; diamond; copper; pistons; hydrodynamics; nanofluidics; engines; heat transfer analysis; nanofluids; diamond nanoparticles; copper nanoparticles; engine oil; piston-cooling gallery; piston thermal loading calculations; numerical hydrodynamic simulation; liquid-solid-coupled thermodynamic method

摘要：Attaining proper temperature in engines is always a challenge for engine manufacturers primarily because temperature has a significant role in engine performance and emissions. With the development of new technology in the field of nanofluids, it seems very promising to use nanofluids as the coolant in internal combustion engines. In this reported work, Cu and diamond nanoparticles with diameters of 50 nm were dispersed in conventional engine oil to create nanofluids (volume fractions of 1, 2 and 3%) to serve as the cooling medium for a piston-cooling gallery. The piston thermal loading calculations were carried out based on numerical hydrodynamic simulation through a liquid-solid-coupled thermodynamic method. The obtained results indicate that using different volume fractions of nanofluids can effectively reduce the thermal loading of the piston.