Application of CCD Cameras to Investigations of Mixing on Boundaries of a Thermal Plasma Jet

作     者：J.HLINA J.SONSKY J.SLECHTA 

作者机构：Institute of ThermomechanicsAcademy of Sciences of the Czech RepublicDolejskova 5182 00 Praha 8Czech Republic 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2007年第9卷第6期

页      面：743-746页

核心收录：

学科分类：07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：the Czech Science Foundation under the contract 202/05/0728 

主　　题：thermal plasma jet mixing CCD camera 

摘      要：Mixing of a thermal plasma jet with the surrounding atmosphere was studied using two CCD cameras （PCO SensiCam） situated detecting simultaneously the radiation of argon and nitrogen. The evaluation of image differences between two records showed that the location of regions on plasma jet boundaries characterised by stronger nitrogen radiation changes with the plasma flow rate. Close-to-laminar flow results in a small mixing rate and consequently low nitrogen optical emission on plasma jet boundaries. The increase of the flow rate leads to the formation of a relatively thick and stable layer on the boundaries characterised by strong nitrogen radiation. Further enhancement of the flow rate results in the formation of unstable regions of excited nitrogen molecules moving along the jet.