电极几何参数对离子电流影响的试验研究  

Experimental Study on Influence of Electrode Geometrical Parameters on Ionization Current

作　　者：高忠权[1] 吴筱敏[1] 向往[1] 宋轶明[1] 皮敏[1] 黄佐华[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《西安交通大学学报》2008年第1期36-40,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50276049);陕西省自然科学基金资助项目(2006E142);国家重点基础研究发展规划资助项目(2007CB210006)

摘　　要：在定容燃烧弹中进行了正负电极面积对天然气-空气混合气燃烧产生的离子电流影响的研究,并将高速摄影仪在燃烧过程中拍摄的纹影照片与相应的离子电流进行分析对比.结果表明:电极直径和所布置的圆盘面积等参数不影响离子电流曲线的形态,曲线均存在点火、前锋区、后焰区3个阶段,可以完整地体现燃烧信息;电极几何参数影响电流的幅值,而且正电极面积的影响大于负电极.The influence of electrodes on ionization current generated during the combustion of compressed natural gas （CNG）/air mixture was experimentally studied in a constant volume combustion bomb. In addition, the schlieren pictures taken by a high-speed camera were compared with the corresponding ionization currents. The results show that the electrode diameter and the area of the disks arranged on the electrode do not affect the profiles of the ionization current curves. All the curves include the information of the ignition, the front-flame and the post-flame stages which fully reflect the main combustion process. However, the values of the ionization current are affected by the electrode geometrical parameters, and the anode area has more influence on the ionization current than the cathode area.

关 键 词：电极几何参数 离子电流 电极面积 燃烧 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]