耦合法在柴油机传热研究中的应用  

Application of Coupled Methods on Heat Transfer of 6110 Diesel Engine

作　　者：赵宏国[1] 白敏丽[1] 王宇[1] 吕继组[1] 周龙[1] 

机构地区：[1]大连理工大学能源与动力学院,大连116023

出　　处：《小型内燃机与摩托车》2007年第6期1-5,共5页Small Internal Combustion Engine and Motorcycle

基　　金：国家自然科学基金资助项目(50276007和50576008);辽宁省自然科学基金资助项目(2001101058和20042156)

摘　　要：利用流固耦合的分析方法,将柴油机气缸盖、气缸垫、气缸体、气缸套等柴油机主要零部件以及缸内气体、冷却介质作为一个耦合体,进行燃烧室部件的传热数值模拟实验。其中,冷却水侧的对流换热系数和温度由CFD软件Star-CD对整个水路进行模拟计算获得;底板火力面侧燃气的对流换热系数和温度由GT-POWER软件对缸内工作过程进行模拟获得;缸套燃气侧温度由活塞组——气缸套耦合传热模拟获得。最终的计算结果与实验数据较吻合,可以为柴油机热负荷分析和柴油机设计提供理论依据。With the coupled fluid - structure analysis method, the simulation experiments are carried out upon the heat transfer values for the combustion chamber parts, by coupling together the coolant, the gas inside the cylinder, and the main parts of the diesel engine, including cylinder head, cylinder gasket, cylinder block, cylinder liner and so on. Among these values, the heat transfer coefficient and the temperature of the cooling water are calculated by simulating the whole water circle via CFD Star - CD, the heat transfer coefficient and the temperature of the gas near the flame deck are determined by simulating the working process within the cylinder via GT - POWER, the cylinder liner temperature near the gas is obtained from simulating the heat trans- fer process of the piston - set and cylinder - liner coupling. The final simulation results show a good agreement with the available experimental data, which can be used as the theoretical basis for the thermal load study and the design of the diesel engine.

关 键 词：柴油机 耦合 温度场 热负荷 

分 类 号：TK421.1[动力工程及工程热物理—动力机械及工程]