期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Study on characteristics of controllable active thermo-atmosphere of a vitiated coflow combustor 被引量:11
1
作者 WUZhijun DENGJun LILiguang 《Chinese Science Bulletin》 SCIE EI CAS 2005年第7期704-707,共4页
Turbulent combustion remains to be one of most complicated technologies due to the complexities of turbulence and combustion as well as the interaction of both. This paper presents a vitiated coflow combustor, which i... Turbulent combustion remains to be one of most complicated technologies due to the complexities of turbulence and combustion as well as the interaction of both. This paper presents a vitiated coflow combustor, which is newly used for the fundamental research into turbulent combustion. The characteristics of controllable active thermo-atmosphere (CATA) of a vitiated coflow combustor are investigated. The results show that the oxygen mole frac- tion of vitiated coflow flames between 0% and 21% yield coflow temperature between 700 and 1500 K, and there is a constant temperature space as a cylinder with a radius of 40 mm. These features of the vitiated coflow indicate the exis- tence of a controllable active thermo-atmosphere, which benefits the basic study on the autoignition of a combustible mixture in a homogeneous charge compression ignition (HCCI) combustion. 展开更多
关键词 协流 燃烧器 热量 空气 燃料 温度
原文传递
Study of droplet size and velocity of fuel containing CO_2 spray by means of PDA 被引量:2
2
作者 XIAOJin QIAOXinqi HUANGZhen FANGJunhua 《Chinese Science Bulletin》 SCIE EI CAS 2004年第11期1195-1199,共5页
Injection of fuel containing CO2 has potential to reduce NOx and soot emissions in a diesel engine. This paper presents an experimental study on the spray charac-teristics of fuel containing CO2 as measured by phase d... Injection of fuel containing CO2 has potential to reduce NOx and soot emissions in a diesel engine. This paper presents an experimental study on the spray charac-teristics of fuel containing CO2 as measured by phase dop-pler anemometry (PDA). Experiments were performed un-der atmospheric conditions on diesel hole-type nozzles at constant injection pressure. Effects of CO2 concentration in diesel fuel on the spray pattern, droplet size and velocity were measured. Experimental results show that fuel atomi-zation will improve greatly when the concentration of dis-solved CO2 in the fuel exceeds the critical value. The axial and radial velocity of the fuel spray containing CO2 is larger than that of conventional diesel fuel spray near the nozzle exit due to flash boiling phenomena. Downstream of the spray, the radial velocity and droplet size of fuel containing CO2 is much more uniform and smaller than that of pure diesel spray. It is attributed to the greatly enhanced liq-uid-gas mixing resulting from flash separation of CO2 from the liquid. New insight into the atomization of the fuel con-taining CO2 was obtained and a possible mechanism to ex-plain the phenomena was proposed. The method may be developed into a new technique for controlling diesel com-bustion and exhaust emissions. 展开更多
关键词 阶段多普勒风力测定 燃料 二氧化碳 喷射 微珠大小 柴油机 发动机 双生流 雾化
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部