Influence of the nozzle size on the plasma jet evolution in liquid media

摘要：

　　To explore the influence of the nozzle size on the interaction characteristics between a plasma jet and the liquid working media during the process of electro-thermal chemical launching, a two-dimension unsteady mathematical-physical model of a plasma jet expanding in the liquid working medium was established.The expansion processes of a plasma jet in the liquid chambers with different nozzle structures were simulated and the flow field structures of plasma-liquid interaction were analyzed.Results indicate that a typical Taylor cavity is formed and successively extends along the steps of the stepped-wall chamber;the stepped-wall provides the plasma jet with radial induction effect.The necking phenomenon of the Taylor cavity appears near steps, and a high-pressure region appears at the head of Taylor cavity.Increasing the nozzle structural factor reinforces the axial expansion capability of Taylor cavity but is not conducive to the Taylor cavitys extended stability.

关键词： Plasma jet Stepped-wall chamber Nozzle size Turbulent mixing Taylor cavity

作者: Yi LIU Yong-gang YU Shan-shan MANG

作者单位: School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094 School of Science, Nanjing University of Science and Technology, Nanjing 210094, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 391-394

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）