Studies on the Particulate Formation and Emission Mechanism of Spray Combustion

本研究围绕五个主要研究主题，系统、综合地进行，试图弄清颗粒物问题。1.扩散火焰和喷雾火焰中碳烟生成的研究：通过对湍流扩散火焰和部分预混湍流扩散火焰中碳烟、总烃、氧和温度的测量，研究了火焰中碳烟的生成过程。进一步研究了燃料性质、燃料中氧含量和燃料中杂质对碳烟生成的影响。2.快速压缩机和发动机微粒形成的研究：使用各种燃料的发动机试验表明，一些燃料特性影响微粒排放特性。通过理论分析，确定了主要的附加参数。此外，为了研究燃烧室几何形状对颗粒排放的影响，对缩口燃烧室的颗粒排放特性进行了测量。当量比、温度、 ...更多信息 系统地研究了压力和压力对定容预混燃烧碳烟形成的影响。3.柴油机和加热炉中微粒形成的研究：揭示了芳烃含量和高沸点含量对微粒形成的影响。同时给出了SOF中润滑剂、未燃燃料和裂解馏分的排放特性。此外，还研究了柴油机中多环芳烃的生成过程。4.降低柴油机微粒排放的研究：通过高压喷油系统的试验和喷雾燃烧的照片，研究了控制微粒排放和促进碳烟云氧化的必要条件。在此基础上，利用激光诊断技术测量了燃油-空气混合气喷射的喷雾特性，并通过发动机试验研究了其对碳烟排放的降低效果。5.微粒对润滑和磨损影响的研究：通过真实的发动机磨损试验，研究了润滑油中碳和添加剂对凸轮和挺柱磨损的影响。为了准确测定醋酸露点，试制了几种不同检测方法的露点仪，并进行了检验。少

This study consists of 5 main research theme and was carried out systematically and synthetically to try to make clear the problem of particulates. 1. A study on the soot formation in diffusion flames and spray flames: Soot, total hydrocarbon, oxygen, and temperature in turbulent diffuion flames and partially premixed turbulent diffusion flames were measured to study the soot formation process in flames. Further, effects of fuel properities, oxygen addition to fuel and inpurity in fuel on soot formation were studies. 2. A study on the formation of particulates by Rapid Compression Machines and Engines: Engine tests using various kinds of fuels showed some fuel properties affecting particulate emission characteristics. From theoretical analysis, major additional parameters were specified. Further, in order to study the effect of combustion chamber geometry, the characteristics of particulates emission of re-entrant combustion chamber were measured. Effects of equivalence ratio, temperat … More ure and pressure on soot formation in a constant volume premixture combustion were systematically examined. 3. A study on the formation of particulates in Diesel Engines and furnaces: Effects of aromatic content and high-boiling point content on particulates were revealed. Also, the emision characteristics of the libricant, the unburnt fuel and cracking fractions in the SOF are shown. Furthermore, the formation process of polycric aromatic hydrocarbons in Diesel engine was studied. 4. Astudy on the reduction of particulates of Diesel engines: From experiments with high pressure fuel injection system and photographs of juel spray combustion, condition whic were necessary for controlling the particulates emission and promoting the oxdization of soot-clouds were studied. Further, spray characteristics of fuel-air mixture injection were measured by laser diagnostics and the reduction effect of soot emissions were studied by engine tests. 5. A study on the influence of particulates on the lublication and wear: Effects of carbons and additives in luburicating oils on the wear of cams and tappets were studied by mortoring test of a real engine. In order to measure acie dew points precisely, several dew points instruments with different detection methods were produced trially and examined. Less