机械

建立了摩托车发动机缸体与水套流固耦合传热仿真模型,进行了流体与固体之间的共轭传热仿真。结果表明,水套对缸体的散热效果基本满足散热要求;但缸体缸套区域水套内的冷却水流速分布较差,存在比较大范围的漩涡和流动死区,导致缸套局部过热,周向温差过大,为此对分水孔进行了优化设计,基本消除了流动死区,显著提高了水套冷却效能,缸体主要区域的温度显著减低,缸套局部过热也得到很大缓解。

Established the fluid-solid coupling heat transfer simulation model of motorcycle engine cylinder block and the water jacket. Computes the simulation model and the results showed that the cooling effect of water jacket cover the basic needs of heat dissipation. But the velocity distribution of cooling water around the cylinder liner was poor. There is a wide range of vortex flow and flow dead zone existed. Therefore lead to local overheat and circumferential temperature difference too much of cylinder liner.So optimized the points hole location. Basically eliminated the flow dead zone and improve the jacket cooling effectiveness significantly. The main area of cylinder body temperature significantly reduced, local overheat of cylinder liner slashed so much.