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十八、混合气形成的概述混合气形成的意义应理解为彼此相关的分过程的总合,这些分过程使燃烧室内的燃料一空气混合物逐渐达到均匀。随喷射系统将燃料喷入燃烧室,混合气的形成便开始了。通过喷嘴孔射出的燃料束被雾化成大量的小油滴。油滴在各种流体动力因素(包括原定的空气运动、紊流脉动)作用下逐渐分布在燃烧室内,并开始蒸发。混合气形成过程的特性主要取决于燃烧室的形状。根据混合气形成的方法,燃烧室可以分成两大类:①直接喷射式燃烧室,
XVIII. Overview of Gas Mixture Formation The meaning of gas mixture formation is to be understood as a summation of the sub-processes associated with each other, which progressively leads to gradual uniformization of the fuel-air mixture in the combustion chamber. With the injection system injecting fuel into the combustion chamber, the formation of the mixture begins. The fuel jet emerging through the nozzle hole is atomized into a large number of small oil droplets. Oil droplets in a variety of hydrodynamic factors (including the original air movement, turbulent pulsation) gradually distributed in the combustion chamber, and began to evaporate. The characteristics of the mixture formation process depend mainly on the shape of the combustion chamber. According to the method of mixture formation, the combustion chamber can be divided into two categories: ① direct injection combustion chamber,