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论文类型：期刊论文

发表时间：2022-06-30

发表刊物：振动与冲击

期号：5

页面范围：192-198

ISSN号：1000-3835

摘要：Part of heat energy produced by burning oil is transferred to the piston in a combustion engine.When the power density of the piston exceeds 0.3 kW/cm2,the piston must be cooled with a cooling chamber.In order to reveal heat transfer and flow characteristics of nanofluid in the cooling chamber,heat transfer and visualization tests with different types of nanofluid were performed in a straight circular pipe under reciprocating vibration.The test results showed that the optimal filling rate for heat transfer is 53.4％;the frequency of reciprocating vibration and the hydraulic radius of particles are all proportional to the convection heat transfer coefficient of the cooling chamber;the fluid mixure effect is the best when the rotation angle of rotor is with in 180° to 270°;the flowing disord level of nanofluid is better than that of pure water in a reciprocating vibration cycle.

备注：新增回溯数据