摘要
内燃机气缸水套内冷却液的流动状态对内燃机高温部件的冷却效果和能量利用效率具有重要影响。随着内燃机技术持续发展,优化其冷却循环系统已成为研发的关键任务。由于内燃机内部结构复杂,通过实验测量内燃机缸内流体的流动状态较为困难。因此,数值模拟方法成为了研究内燃机缸内流体流动的重要手段。以487型柴油机为例,对其冷却水套进行初步分析并建立模型。通过数值模拟,分析了不同模型结构、冷却水进口速度及进口温度条件下,温度场、速度场和对流传热系数等参数的变化规律。结果表明,改进模型进出水口的位置和尺寸可有效改变冷却水套内的流体流动状态;此外,增加进口速度与降低进口温度能够显著提升热通量及对流传热系数,强化冷却效果。
The flow state of coolant in the cylinder water jacket of an internal combustion engine has a significant impact on the cooling effect and energy utilization efficiency of high-temperature components of the engine.With the continuous development of internal combustion engine technology,optimizing its cooling cycle system has become a key task in research and development.Due to the complex internal structure of internal combustion engines,it is difficult to measure the flow state of fluid inside the cylinder through experiments.Therefore,numerical simulation methods have become an important means of studying fluid flow inside internal combustion engine cylinders.Taking the 487 internal combustion engine as an example,a preliminary analysis was conducted on its cooling water jacket and a model was established.Through numerical simulation,the variation patterns of temperature field,velocity field,and convective heat transfer coefficient parameters were analyzed under different model structures,cooling water inlet velocities,and inlet temperatures.The results indicate that improving the position and size of the inlet and outlet of the model can effectively alter the fluid flow state inside the cooling water jacket;In addition,increasing the import speed and reducing the import temperature can significantly improve the heat flux and convective heat transfer coefficient,enhancing the cooling effect.
作者
孙少辰
SUN Shaochen(Shenyang Institute of Special Equipment Inspection and Research,Shenyang,Liaoning 110035)
出处
《化工装备技术》
2025年第4期22-27,共6页
Chemical Equipment Technology
关键词
气缸水套
数值模拟
表面传热系数
Cylinder water jacket
Numerical simulation
Surface heat transfer coefficient
