Application of Coupled Methods to Heat Transfer, Lubrication and Friction of Piston Ring in Diesel Engine
Coupled method is more accurate than single component method or single physical field method. The in- cylinder gas, piston, piston ring, lubrication oil film, cylinder liner and coolant, of diesel engine are simulated as a whole in this paper. Considering the coupled relations of various components and the related physical fields, a mathematical model to study the 3D transient thermal mixed lubrication and friction performance of piston ring-cylinder liner is built by adopting the coupled method. The model couples the 3D transient heat conduction model, the hydrodynamic lubrication model, the heat transfer model of oil film together. Based on the above model, the corresponding calculation software is developed. The software is applied to a 6110 diesel engine to carry out heat transfer, lubrication and friction simulation for its piston assembly-cylinder liner. Accordingly, the 3D transient temperature fields of piston assembly-cylinder liner, as well as the minimum oil film thickness, temperature, viscosity, hydrodynamic pressure distribution, friction force and friction heat generated at the piston ring- cylinder liner interface, are predicted. The experimental results demonstrate that through the coupled method, the3D transient temperature fields of the coupled model could truly reflect the thermal loads of piston assembly-cylinder liner. Therefore, the coupled model built by the coupled method in this paper, could factually image the characteristic of the heat transfer, lubrication and friction on piston ring.
Piston assembly-cylinder liner Heat transfer lubrication and friction Coupled Piston ring
Long Zhou Minli Bai Junfeng Xu Jiawei Liu
School of Energy and Power Engineering, Dalian University of Technology, Dalian, 116023, China School of Energy and Power Engineering, Dalian University of Technology, Dalian,116023, China
国际会议
2007年(中国内燃机学会第六届学术年会暨国际内燃机学术研讨会和第六届中国国际内燃机及制造装备展览会)两会一展国际学术会议
上海
英文
299-305
2007-10-09（万方平台首次上网日期，不代表论文的发表时间）