摘要
采用Altair公司的HyperMesh软件进行有限元前处理,借助ANSYS公司的fluent流体求解器开展流动传热非耦合稳态计算。研究了冷却水的温度场、压力场、速度场及换热系数场。结果显示,缸体冷却水套冷却水流速较低但分布较为均匀,进出口压力损失较小;然而,缸盖水套中进排气门之间的鼻梁区冷却效果欠佳,此处流速低、换热系数小,不利于热负荷降低,通过增大冷却水流量,从0.533 kg/s提升至1.2 kg/s。流量增大后,冷却水的流速显著提升,超过0.5 m/s,机体和缸盖水套的平均换热系数大幅增加,分别达到3795.2864 W/m^(2)·K、5473.8198 w/m^(2)·K,冷却效果得到有效改善。尽管进出口压差有所上升,达到9.4 kPa,但仍处于允许范围内。本研究为某型双缸柴油机冷却系统的优化提供了重要的理论依据与实践参考,有助于提升发动机的整体性能与可靠性。
The finite element pre-processing was conducted using Altair's HyperMesh software,and the flow and heat transfer uncoupled steady-state calculations were performed using ANSYS Fluent fluid solver.The temperature field,pressure field,velocity field,and heat transfer coefficient field of the coolant were investigated.The results show that the coolant flow velocity in the cylinder block cooling jacket is relatively low but evenly distributed,with minimal inlet and outlet pressure loss.However,the cooling effect in the bridge area between the intake and exhaust valves in the cylinder head water jacket is poor,where the flow velocity is low,and the heat transfer coefficient is small,which hinders heat load reduction.By increasing the coolant flow rate from 0.533 kg/s to 1.2 kg/s,the flow velocity significantly increased,surpassing 0.5 m/s.The average heat transfer coefficients in both the engine block and cylinder head water jackets increased substantially,reaching 3795.2864 W/m^(2)·K and 5473.8198 W/m^(2)·K,respectively,leading to an effective improvement in cooling performance.Although the pressure difference at the inlet and outlet increased to 9.4 kPa,it remains within an acceptable range.This study provides an important theoretical basis and practical reference for optimizing the cooling system of the D09TCI diesel engine,contributing to the enhancement of engine performance and reliability.
作者
陈友才
李静文
吕若福
王润
牛泽良
杨梦丽
尹成斌
Chen You-cai;Li Jing-wen;Lv Ruo-fu;Wang Run;Niu Ze-liang;Yang Meng-li;Yin Cheng-bin(Yunnan Yunnei Power Machinery Manufacturing Co.,Ltd.,Yunnan Kunming 651701)
出处
《内燃机与配件》
2025年第13期9-12,共4页
Internal Combustion Engine & Parts
关键词
柴油机
冷却水流动
稳态传热
流量优化
Diesel engine
Coolant flow
Steady-state heat transfer
Flow rate optimization
