甲烷高压射流动量特征  

Jet Momentum Characteristics of High-Pressure Methane

作　　者：雷艳[1] 李泳 李志杰 仇滔[1] 常凯 彭广宇[3] Lei Yan;Li Yong;Li Zhijie;Qiu Tao;Chang Kai;Peng Guangyu(School of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China;State Key Laboratory of Engine Reliability,Weichai Power Co.,Ltd,Weifang 261061,China;School of Mechanical and Electrical Engineering,Hunan Communication Polytechnic,Changsha 410132,China)

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]潍柴动力集团内燃机可靠性国家重点试验室,潍坊261061 [3]湖南交通职业技术学院机电工程学院,长沙410132

出　　处：《燃烧科学与技术》2021年第2期121-128,共8页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(91641106);内燃机可靠性国家重点试验室开放课题资助项目(skler-201810,skler-201913);湖南省自然科学基金资助项目(2018JJ2106).

摘　　要：以甲烷为研究气体,采用测量板、弹簧一阶振动系统来测量高压甲烷在圆柱形单孔喷嘴的射流特性,开展了不同喷射脉宽、不同喷射压力和沿射流方向、不同位置的高压甲烷气体射流动量测量试验.结果表明:高压甲烷射流冲击测量板是非定常动态过程,测量板最大位移量与喷射脉宽、喷射压力以及沿射流方向测量板的位置有关.高压甲烷射流冲击最大动量沿射流方向发生变化,可分为初始区域和主体区域.初始区域:甲烷射流冲击最大动量先急剧减小后逐渐增加,且初始区域的长度与喷射压力存在对数关系.主体区域:甲烷射流冲击最大动量基本保持不变,随着喷射压力的升高,主体区域射流冲击最大动量线性增加.In this paper,methane was taken as the research objective.A first-order vibration system comprising of a test plate and a spring was specially designed to test the jet momentum of high-pressure methane from a singlehole cylindrical nozzle.Experiments on high-pressure methane jet momentum were performed under the conditions of varied injection pulse,injection pressure and test positions along the gas jet flow.The experimental results show that the methane jet on the plate was an unsteady dynamic process.The maximum displacement of the jet plate was affected by such parameters as injection pulse,injection pressure and the test positions along the gas jet flow.In addition,the biggest high-pressure methane jet momentum varied in the jet direction,and there were two fields in the gas jet direction:the initial jet field and the main jet field.In the initial jet field,the biggest methane jet momentum sharply decreased and then gradually rose,and there was a logarithmic correlation between jet penetration length and injection pressure.In the main jet field,the maximal jet momentum remained constant,and it increased linearly as the gas injection pressure rose.

关 键 词：天然气直喷 圆柱形喷孔 甲烷 射流动量 喷射压力 

分 类 号：TK437[动力工程及工程热物理—动力机械及工程]