新型隔热涂层对发动机性能的影响  

Effect of New Thermal Insulation Coating on Engine Performance

作　　者：王斌 贾德民 孙楠楠 齐少豹 石磊 WANG Bin;JIA Demin;SUN Nannan;QI Shaobao;SHI Lei(Weichai Power Co.,Ltd.,Weifang 261061,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061

出　　处：《车用发动机》2024年第3期25-29,41,共6页Vehicle Engine

摘　　要：在发动机上采用隔热技术可以减少传热量,降低热损失,提高热效率,提高发动机的排气能量。对一种新型的隔热涂层——低导热系数、低热容隔热涂层进行了研究,研究发现,将该种新型隔热涂层喷涂于活塞壁面后,活塞壁面温度随缸内气体温度的变化而变化,即膨胀冲程随缸内温度升高而升高,进气冲程随缸内温度降低而降低,该属性有效减少了壁面传热且避免了进气加热。在一台重型发动机上使用新型涂层活塞对发动机的性能进行仿真试验研究,发现具有一定材料属性且合适厚度的新型隔热涂层可以减少活塞的传热量,提高发动机的热效率和排气能量。The application of adiabatic technology to engine can reduce heat transfer and heat loss and improve thermal efficiency and engine exhaust energy.A new thermal insulation coating was studied,which had low thermal conductivity and low thermal capacity.The proposed coating was sprayed on the piston wall surface,and the wall temperature changed with the in-cylinder gas temperature,which increased during the expansion stroke and decreased during the intake stroke.This property effectively reduced the heat transfer of wall and avoided the heating of intake air.Then the simulation test study were conducted on a heavy-duty engine by using the new coated piston,which indicated that the new thermal insulation coating with appropriate thickness could effectively reduce the heat transfer of piston and improve the thermal efficiency and exhaust energy of engine.

关 键 词：发动机 隔热涂层 传热 热效率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]