用电子计算机模拟柴油机瞬态喷雾过程

COMPUTER SIMULATION OF TRANSIENT SPRAY IN DIESEL ENGINE

本文提出了一个用电子计算机模拟柴油机瞬态喷雾过程的模型和程序,其中考虑了滴径分布、射油规律、蒸发作用、气缸内空气运动和热力状态的变化,可给出代表性油滴的轨迹,落点、着壁速度、贯穿深度、瞬时油束形状和油雾散开情况,油滴的温升和重量变化等各方面的资料,和现有的其他方法比较,本方法可给研究和设计人员提供更多的有用信息。

A model for computer simulating the transient fuel spray in a compression ignition engine is presented. In this model, the size distribution of the droplets, rate of injection, droplet evaporation, air movement and thermal state in cylinder are to be considered and thus the informations of the trajectories of the droplets, the position and Telocity of the impingement on the cylinder wall, penetration and trasient configuration of the spray, diffusion of the droplets, temperature rise and weight reduction of the droplet, the effect of injection rate and swirl etc can be obtained. This model is found more practical and reasonable in physical sense and also provides more valuable information to the researchers and engine designers.