定容燃烧弹中离子信号的特征分析  

Analysis on the Characteristics of the Ionic Signal in a Constant Volume Combustion Bomb

作　　者：吴筱敏[1] 杜卫宁[1] 廖世勇[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：《燃烧科学与技术》2005年第2期101-104,共4页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50276049).

摘　　要：在定容燃烧弹中同时进行离子信号和压力的测量,并通过高速摄影仪在燃烧过程中拍摄的纹影照片与相应的离子信号进行对比,分析了点火和燃烧中离子信号的点火、火焰前锋和火焰后区三个阶段.阐述了点火阶段的离子信号主要与电极间空气隙被击穿瞬间火花放电时产生的感应电压有关,火焰前锋的信号主要与电极附近的火核有关,以及火焰后区的信号主要与已燃区内各种成分的离子和电子有关的观点;论述了离子信号三个阶段的主要特点以及产生的主要原因.That the ionic signal produced during ignition and combustion chiefly processes ignition, front-flame and post-flame combustion stages is introduced by simultaneously detecting both the signal and the pressure in a constant volume combustion bomb, and by comparing the schlieren pictures taken via a high-speed camera with correspondent ionic signal in combustion process. The point of view is that the ionic signal of ignition is mainly related to the induced voltage by spark discharge at breakdown of air gap of electrodes, the signal of front-flame is connected with flame kernel round the poles, and the signal of post-flame is associated with all kinds of ions and electrons in the burned area. The main features and causes of ionic signal on the three stages are also discussed.

关 键 词：离子信号 燃烧 纹影照片 定容燃烧弹 

分 类 号：TK411[动力工程及工程热物理—动力机械及工程]