摘要
针对某高功率密度船用大功率柴油机开发设计过程中,缸内热负荷增加导致缸套等受热零部件温度过高的情况,对冷却水腔结构进行局部优化。采用数值模拟的方法对改进前后的流场和温度场进行了对比分析,结果表明:优化后的冷却系统使整体流动阻力减小3%的同时,明显改善了缸盖和缸套关键区域的温度和热负荷情况,其中缸盖排气阀座位置最高温度下降30℃,第一道活塞环位置缸套平均温度下降8℃。
Aiming at the phenomenon that the increase of thermal loads in the cylinder of high power den-sity marine diesel engine causes overheating of cylinder liner and other parts in the development and de-sign process, the cooling chamber was partially optimized. The flow field and temperature fieht before andafter the optimization were compared by using simulation method. The results showed that the optimizedcooling system not only reduced the total flow resistance by 3%, but also substantially decreased the tem-perature and thermal loads of cylinder head, cylinder liner and other key components. Tile highest tem-perature at the exhaust valve seat was decreased by 30 ℃, and the average temperature at the first pistonring was decreased by 8 ℃.
出处
《柴油机》
2016年第2期20-23,共4页
Diesel Engine
关键词
船用柴油机
冷却系统
优化
仿真
marine diesel engine
cooling system
optimization
simulation
