一种预混燃烧加热式定容燃烧弹的研发  

Development of a constant volume combustion bomb heated by premixed burning

作　　者：邓鹏[1] 黄荣华[1] 张永林[1] 马寅杰[1] 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2013年第8期121-127,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50976039)

摘　　要：为提高定容燃烧弹的适应性,增强其功能扩展潜力,采用模块化设计思想,研制出可满足预混燃烧、喷雾蒸发与燃烧等多种类型研究需求的可视化定容燃烧弹.为模拟内燃机缸内高温高压和氧体积分数可调的喷雾燃烧环境,采用乙炔+氧气预混合燃烧加热法,试验结果表明:该方法可方便快速地模拟出氧体积分数为0%～21%、环境压力为0.04～10.00MPa和环境温度为300～1300K的喷雾燃烧环境;结合高速数字纹影法光学诊断系统,实现了对喷雾雾化过程、油气蒸发混合过程和喷雾着火燃烧过程的高速观测与记录;该试验平台为深入研究内燃机喷雾蒸发与燃烧过程提供了必要条件.An optical accessible constant volume combustion bomb was developed by the modular design concept to improve its adaptability and capability. This combustion bomb can meet the requirements for premixed combustion, spray evaporation, spray combustion, etc. To simulate the high pressure, high temperature and oxygen lean conditions occurred in advanced diesel engines, the ambient gas in the combustion bomb was heated by preburning of acetylene＋oxygen mixture. Experiments show that this apparatus can simulate different spray combustion environments conveniently, the oxygen concentration ranges from 0% to 21%, the ambient pressure ranges from 0.04 to 10.00 MPa and the ambient tempreature ranges from 300 to 1 300 K. Spray atomization, evaporation and combustion process were studied in the apparatus using high speed schlieren method. Results show that this apparatus provides an essential prerequisite for studying issues related to vaporizing and combustion fuel spray in internal combustion engines.

关 键 词：定容燃烧弹 高速纹影法 喷雾雾化 喷雾蒸发 喷雾燃烧 预混燃烧 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]