预测直喷式柴油机NO排放模型的研究 (Ⅰ)直喷式柴油机的燃烧模型

Outline of Combustion Model for Direct-Injection Diesel Engines

本文介绍了一个有一定使用价值而又相对比较简单的准维柴油机燃烧模型。模型将喷入的燃油喷雾分成若干计算小区 ,并假定各小区之间不发生传质 ,各小区吸收喷雾外区域卷吸入的空气和接收喷入的燃油 ;除利用一系列经验公式计算喷雾的轨迹、空气的卷吸、燃油在喷雾中的径向分布和缸内气体与外界的热交换外 ,还应用了独立的反应动力模型。

The paper introduces a relatively simple but useful quasi dimensional diesel combustion model. The model divides the injected spray into some subdivisions, and assumes there is no mass transfer between these subdivisions. The subdivision entrains air from the ambient and receives fuel from the fuel injection. The model calculates the spray trajectory, entrained air, radial profile of the fuel droplets in the fuel spray and the heat transfer by empirical formulas, a sub model of combustion reactive kinetics is used.