Temperature Field Analysis of Diesel Engine Piston Considering Intake Cooling Effect

ZHAO Lipu; WANG Jingchao; XU Tianshu; ZHANG Junhong

doi:10.3969/j.issn.1001-2222.2019.02.007

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (2) : 42-49. DOI: 10.3969/j.issn.1001-2222.2019.02.007

Temperature Field Analysis of Diesel Engine Piston Considering Intake Cooling Effect

ZHAO Lipu^1,2,WANG Jingchao³,XU Tianshu³，ZHANG Junhong³

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Abstract

Considering the effect of intake process on the incylinder gas temperature and the piston top temperature distribution, the incylinder combustion simulation was carried out to obtain the convective heat transfer coefficient of piston top, the incylinder gas temperature curve and the boundary conditions of piston assembly. The temperature field analysis of diesel engine piston was conducted under cold start and rated speed conditions and the analysis results were verified through the piston temperature test. The results show that the calculation of piston temperature has a higher precision and the error between calculation and measurement is within 6% after taking into account the intake cooling effect. According, the method provides the accurate boundary and meaningful reference for the stressstrain analysis and the structural optimization of piston.

Key words

diesel engine；piston / intake cooling；temperature field / cold start

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ZHAO Lipu,WANG Jingchao,XU Tianshu,ZHANG Junhong. Temperature Field Analysis of Diesel Engine Piston Considering Intake Cooling Effect[J]. Vehicle Engine. 2019, 0(2): 42-49 https://doi.org/10.3969/j.issn.1001-2222.2019.02.007