考虑活塞环组动力学的船用大功率柴油机组合式活塞温度场预测  

Temperature Distribution Prediction of a Multi-Piece Piston of High Power Marine Diesel Engine Considering the Piston Ring Pack Dynamics

作　　者：何涛 卢熙群[2] 邹德全[2] 郭宜斌[2] 李玩幽[2] 

机构地区：[1]武汉第二船舶设计院,武汉430205 [2]哈尔滨工程大学动力与能源工程学院,哈尔滨150001

出　　处：《内燃机工程》2016年第3期66-72,共7页Chinese Internal Combustion Engine Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCF120304);国家自然科学基金项目(51375104)

摘　　要：通过建立柴油机组合式活塞的3D有限元模型,以文献中参考机型的实测缸套温度为温度边界条件,根据相应经验公式取得各换热区的对流传热系数,对新设计船用大功率柴油机组合式活塞进行温度场预测,并将计算所得到的温度场与参考机型实测温度场进行对比。为使得仿真计算更接近实际情况,考虑了活塞环组运动对传热系数的影响。计算结果表明:所得的温度场与相似机型实测温度场分布规律类似,可以为新设计发动机的热负荷试验提供指导。Based on an axi-symmetrical 3D finite element model for marine diesel engine, the temperature field prediction of a new multi-piece piston was carried out under the boundary conditions defined by the measured cylinder liner temperature of a reference engine and by using a convection heat transfer coefficient（HTC）obtained from empirical formula. The temperature field of the new piston simulated from FEA was compared with the measured temperature field obtained from a reference engine under the influence of the movement of piston assembly on the heat transfer coefficient. The simulation results show that the calculated temperature field is consistent with the measured temperature field, which will provide a technical guidance for the thermal load test of a new designed marine engine and parts.

关 键 词：内燃机 组合活塞 温度场预测 传热系数 活塞环组动力学 

分 类 号：TK423.3[动力工程及工程热物理—动力机械及工程]