哈尔滨工程大学学报2017，Vol.38Issue(3)：378-384,7.DOI:10.11990/jheu.201601080
柴油机气缸套瞬态温度场移动边界方法分析
Analysis of the transient temperature fields of a diesel engine liner by using a moving boundary method
摘要
Abstract
In the finite element analysis of a diesel engine liner,transient thermal boundary conditions have essential influence on the temperature distribution calculation.To analyze the temperature fields and thermal load of the liner of a medium-speed diesel engine,the transient temperature fields of the liner were analyzed based on a moving boundary method.The working process of a diesel engine was simulated with a 1-D working cycle simulation,whereby the transient temperature and heat transfer coefficient of the working fluid were obtained.With the combination of transient piston position,the liner surface area was divided into three major areas:working fluid contacting area,piston assembly contacting area,and crankcase air contacting area.The transient thermal boundary conditions of these areas were applied separately.With the application of a cyclically varying thermal load on the liner,the transient temperature fields of the liner were calculated.The results show that under stable operating conditions,the liner surface temperatures present cyclical variation.The maximum liner surface temperature and the highest temperature fluctuation appear on the top of the liner.The amplitudes of the temperature fluctuations decrease along the cylinder axial.In addition,the temperature fluctuations in the liner decrease rapidly along the radial direction.关键词
柴油机/气缸套/有限元/边界条件/瞬态温度场/热负荷Key words
diesel engine/liner/finite element/boundary conditions/transient temperature fields/thermal load分类
能源科技引用本文复制引用
冯立岩,刘超,王猛,王伟尧,隆武强..柴油机气缸套瞬态温度场移动边界方法分析[J].哈尔滨工程大学学报,2017,38(3):378-384,7.基金项目
国家自然科学基金项目(51079026,51479028) （51079026,51479028）
中央高校基础科研项目(DUT15ZD102). （DUT15ZD102）
