等离子体辅助燃烧机制及其在高速气流中的燃烧应用研究评述

Comments on Researches of Mechanism for Plasma Assisted Combustion and Applications in High Speed Flow-Field

关键词:  等离子点火助燃机理  高速气流  等离子放电  结构相容  能效分析

Key words:  Mechanism of plasma assisted ignition and combustion  High speed flow-field  Plasma discharge  Structure incorporation  Energy-efficient analysis

摘要:

以等离子体点火助燃为特征的燃烧组织技术，为先进发动机发展过程中面临的极端环境下燃烧控制问题提供了极佳的解决途径。加速超声速燃烧反应速率是等离子体扩展气流速度边界的一种典型应用。在对当前等离子体燃烧控制机理相关研究成果简要回顾的基础上，针对超声速燃烧气流参数环境特点，分析了可压缩、强对流的高速气流条件下等离子体点火助燃机制研究所面临的挑战；通过各类等离子体在超声速气流中技术应用发展与研究现状的梳理，阐述了等离子体在结构相容性和能量效率上的限制性因素，对未来的基础研究和技术发展方向提出了建议。

Abstract:

Combustion organization techniques based on plasma assisted ignition and combustion provide an excellent solution for combustion control in extreme environment and would be valuable for the development of advanced engine technology. Acceleration of reaction rate in supersonic combustion is one of the typical application in which the flow velocity limiting for flame-holding boundary would be extended by plasma. The achievements on plasma assisted combustion control mechanism were generally reviewed. Then the challenges of plasma application in high speed flow-field involved with compressible and intensive convection condition were analyzed. The status and progress of various plasma applications for supersonic combustion were demonstrated. The limiting factors such as structural compatibility and energy efficiency of plasma application were analyzed. Finally， some suggestions on plasma fundamental research and technique development in future were proposed.