论文部分内容阅读
为探讨柴油机燃烧光的性质，在容弹上采用光强传感器，并应用双色法在不同温度、压力、氧浓度与二氧化碳浓度的条件下，对柴油喷雾的燃烧光强波进行了测量分析。结果表明：在柴油机燃烧过程中，同时存在碳粒的氧化与还原两种反应，其中以氧化反应占优势，碳粒与其附面层温度基本一致。碳粒的附面层反应与柴油中其它气体成分的氧化反应形成火焰，所以可认为碳粒与火焰处于热平衡状态，碳粒的表面反应热以热辐射的方式向外界传递。表面反应热与辐射传热的平衡确定了碳粒的体积与密度。因此柴油喷雾的燃烧光强反映的是碳粒的辐射热强度，燃烧光强波反映的是碳粒的氧化过程。燃烧光强与火焰内的总碳量、氧的分压力、碳粒温度有关，同时还受二氧化碳等还原性气体浓度的影响
In order to explore the nature of the diesel engine combustion light, a light intensity sensor was used on the bomb, and a two-color method was used to measure and analyze the light intensity of the combustion of the diesel fuel spray under different temperature, pressure, oxygen concentration and carbon dioxide concentration. The results show that there are two kinds of reactions of oxidation and reduction of carbon particles in the combustion process of diesel engine. Among them, the oxidation reaction predominates and the temperature of carbon particles and the top coating are basically the same. Carbon surface reaction with the formation of the oxidation of other gas components in the flame to form a flame, it can be considered that the carbon particles and the flame in thermal equilibrium, the carbon surface reaction heat to heat radiation to the outside world transmission. The balance of surface reaction heat and radiative heat transfer determines the volume and density of the carbon particles. Therefore, the combustion light intensity of diesel spray reflects the radiant heat intensity of carbon particles. The combustion light intensity reflects the oxidation process of carbon particles. The light intensity of the combustion is related to the total amount of carbon in the flame, the partial pressure of oxygen and the temperature of the carbon particles, and is also affected by the concentration of reducing gas such as carbon dioxide