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随着柴油机的不断强化,活塞热负荷已成为柴油机功率增长的关键问题之一。因此,如何加强活塞冷却,特别是组织高效能的振荡冷却,以便大幅度地降低活塞壁面各特征点温度以适应柴油机强化的需要是至关重要的。为此,我们曾在240组合活塞的测温试验过程中,对如何提高振荡冷却的效能进行了一系列改变振荡冷却进、出口参数的试验。通过对这些试验以及对该活塞温度场电算的分析,得出了提高组合活塞振荡冷却效能的一些普遍
With the constant strengthening of diesel engines, piston thermal load has become one of the key issues in diesel engine power increase. Therefore, how to enhance the piston cooling, especially high-performance oscillating cooling, in order to significantly reduce the characteristic temperature of the piston wall temperature to meet the needs of diesel engine strengthening is essential. To this end, we have carried out a series of experiments on how to improve the efficiency of oscillation cooling in the temperature measurement experiment of 240 combined pistons. The experiments of oscillation cooling inlet and outlet parameters were carried out. Through the analysis of these experiments and the calculation of the temperature field of the piston, some general results of improving the cooling performance of the combined piston are obtained