Spray Cpmbustlon Study for Super Low NOx Emission

超低氮氧化物排放喷雾燃烧研究

• 批准号: 08455107
• 负责人: HIROYASU Hiroyuki
• 金额: $ 4.42万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455107/
• 关键词: NOx; Spray; Combustion; Sprit Injection; Nox; 噴霧燃焼; 予混合燃焼; 希薄燃焼

Diesel combuston processes are significantly affected by the fuel-air mixing process, that is one of the most effective measure for reducing exhaust gas emissions is controling the fuel-air mixing process in the combustion chamber. Especially, controling spatial and temporal distributions of fuel-air mixture is considered to be the key technology for future diesel engines. Therefore, the effects of the spatial and temporal distributions of the fuel-air mixture on diesel combustion and exhaust processes were examined by using a computer simulaiton, a constant volume combustion chamber and an experimental engine equipped with multi-injectors. The results of the current study are summarized as follows :1. A calculative investigation was performed in order to examine the effects of temporal and spatial arrangement of fuel sprays on exhaust emission using a phenomenological spray combustion model. As a result of the calculations, effective measures were found for simultaneous reduction of N … More Ox and smoke emissions.2. Behaviors and characteristics of the diesel spray with split-injection were studied by using an electrically controlled common rail injection system and a high pressure and temperature bomb. One of the sprays were injected from a multi-hole nozzle into a 2-dimensional model combustion chamber installed in the high pressure and high temperature bomb. The spray was observed by schlieren photography, focused-shadow photography and a high speed video camera. Air-fuel formation and characteristics of the spray with split-injectionwas clarified.3. Characteristics of combustion and exhaust emission of D.I.Diesel Engine were investigated under various spatial arrangement of fuel sprays. A cylinder liner was elongated and a flat-top piston was installed in the engine in order to obtain a respectively large pancake-type combustion chamber. Such modification the engine made it possible to obtain radial arrangement of six to ten spravs in the combustion chamber. Effects of spatial distribution of fuel sprays on diesel combustion and exhaust emissions were clarified.All these things made it clear that the guides for developing low NOx and smoke emission engines were obtained. Less

柴油机燃烧过程受油气混合过程的影响很大，控制燃烧室内油气混合过程是降低柴油机排放的有效措施之一。特别是控制油气混合气的空间和时间分布被认为是未来柴油机的关键技术。为此，利用计算机模拟、定容燃烧室和多喷油器试验机，研究了油气混合气的空间和时间分布对柴油机燃烧和排放过程的影响。本研究的主要结果如下：1.为了研究燃油喷雾的时间和空间分布对排放的影响，采用了一个唯象的喷雾燃烧模型进行了计算研究。计算结果表明，在此基础上，提出了同时降低氮含量的有效措施 ...更多信息 氧气和烟雾排放。利用电控共轨喷油系统和高压高温弹对柴油机分次喷射喷雾特性进行了研究。其中一种喷雾从多孔喷嘴喷入安装在高压高温弹中的二维模型燃烧室中。用纹影照相、聚焦阴影照相和高速摄像机观察喷雾。阐明了分注式喷雾的形成及特性.研究了直喷式柴油机在不同燃油喷雾空间布置方式下的燃烧和排放特性。气缸套被拉长，平顶活塞被安装在发动机中，以获得相应的大煎饼型燃烧室。这种改进使发动机能够在燃烧室中获得六到十个喷雾器的径向布置。阐明了燃油喷雾的空间分布对柴油机燃烧和排放的影响，为开发低NOx、低烟度柴油机提供了指导。少

项目成果

Takuo Yoshizaki, et al.: "Experiments and Modeling on Spray Distributions in the Combustion Chamber of a Direct Injection Diesel Engine" SAE Paper. No.961820. 1-15 (1996)

Takuo Yoshizaki 等人：“直喷柴油发动机燃烧室内喷雾分布的实验和建模”SAE 论文。

小田哲也,廣安博之: "レーザシート法による噴霧断面の可視化法" 日本機械学会論文集B編. 62-599. 2861-2866 (1996)

Tetsuya Oda、Hiroyuki Hiroyasu：“使用激光片法可视化喷射横截面”，日本机械工程师学会会刊，B 版 62-599（1996 年）。

Hirofumi IMANISHI: "A Simulation Study of Effects of Air Entrainment Characteristics on NOx and Smoke Emissions Using a Phenomenological D.L.Diesel Combustion Modeling" Proceedings of the Third KSME-JSME Thermal Engineering Conference. 2. 377-382 (1996)

Hirofumi IMANISHI：“利用现象学 D.L. 柴油燃烧模型模拟空气夹带特性对 NOx 和烟气排放的影响”第三届 KSME-JSME 热工会议论文集。

鈴木 護: "全量ガスサンプリングによる直接噴射式ディーゼル機関内燃焼ガス生成過程の解析(第3報,燃料油性状の影響)" 日本機械学会論文集(B). 63-606. 742-746 (1997)

Mamoru Suzuki：“使用总气体采样分析直喷柴油发动机中的燃烧气体生成过程（第三次报告，燃油特性的影响）”日本机械工程师学会会刊（B）63-606。 746 (1997 )

吉崎拓男: "直噴ディーゼル機関燃焼室内における噴霧火災の壁面衝突挙動" 自動車技術会論文集. 28-3. 47-52 (1997)

Takuo Yoshizaki：“直喷式柴油发动机燃烧室中喷雾火焰的壁面冲击行为”，日本汽车工程师学会会刊 28-3 (1997)。