Abstract In research of the accurate relation between two-phase flow pattern and heat transfer characteristics in distinct cooling gallery structures, a dynamic transient visualization test bench was established recording flow of fluid real-time. Meanwhile, multiphase flow model and dynamic mesh were also employed to carry out simulation calculation concerning the dynamic characteristics of two-phase flow and heat transfer characteristics. Compared with the experimental results, the calculation results were extremely close to the actual state. It can be clearly seen that “liquid slug” of engine oil in Kidney shaped cooling gallery emerged mostly during upstroke and the half of downstroke when crankshaft angle was roughly at 90°and 270° while that in water droplet shaped cooling gallery emerged mostly near the entry and exit of engine oil during downstroke of piston. However, liquid slug of engine oil in ellipse shaped cooling gallery appeared in more locations relatively.

中文翻译：

---

冷却廊结构对两相流流动形态及传热特性的影响

摘要 为研究不同冷却廊结构中两相流型与传热特性的准确关系，建立了动态​​瞬态可视化试验台，实时记录流体流动情况。同时，还利用多相流模型和动态网格对两相流的动态特性和传热特性进行了仿真计算。与实验结果相比，计算结果与实际状态极为接近。可以清楚地看出，曲轴转角大致在90°和270°时，肾形冷却通道中发动机油的“液塞”主要出现在上冲程和下冲程的一半，而水滴形冷却通道中的“液塞”主要出现在曲轴角附近活塞下行程时机油的进出。然而，椭圆形冷却通道中的机油液渣相对出现在更多的位置。