高压等离子体射流与整装式含能液体相互作用特性研究

项目名称： 高压等离子体射流与整装式含能液体相互作用特性研究

项目编号： No.51506094

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 莽珊珊

作者单位： 南京理工大学

项目金额： 21万元

中文摘要： 项目以液体工质电热化学超高速推进为背景，研究电热等离子体与整装式含能液体的相互作用机理。利用高速录像和纹影设备，观测等离子体射流在液体工质中的湍流掺混过程，建立整装式条件下等离子射流与液体相互作用的二维多相流模型，分析等离子射流扩展﹑渐扩边界处回流与旋涡等的时空演化特性，研究等离子体射流扩展稳定性的关键影响因素；设计整装式含能液体燃烧推进实验装置，测量高温高压瞬态燃烧工况下的压力与温度，研究燃烧室渐扩结构﹑等离子射流强度﹑推进室动边界﹑含能液体工质燃烧速度等参数变化对燃烧推进过程的影响规律；在实验基础上，利用小波分析和非线性时间序列分析方法，得到关联维数、最大Lyapunov指数等能定量描述系统动力学性质的非线性特征量，揭示燃烧推进过程的动力学本质，探索燃烧稳定性控制方法。该项研究对促进高温高压瞬态燃烧领域的理论和实验技术发展有重要学术价值。

中文关键词： 电热等离子体；液体发射药；非线性动力学；燃烧稳定性控制

英文摘要： With the engineering background of liquid propellant electrothermal chemical hypervelocity propulsion, the interaction mechanisms of electrothermal plasma and bulk-loaded energetic liquid will be researched. Using high speed video system and schlieren apparatus, the turbulent mixing process of plasma jet in liquid medium will be recorded. A 2D multiphase flow model will be developed to analyze unsteady characteristics of plasma jet expansion, boundary of circumfluence and vortex development. The influencing factors on the stability of the plasma jet expansion will be studied. An experimental system will be set up for research of combustion and propulsion process in bulk-loaded energetic liquid. By sensors installed in high temperature and high pressure combustion chamber, transient pressure and temperature will be measured, and some effects such as expansion combustor structure, plasma jet intensity, moving boundary of the combustion chamber, burning rate of liquid propellant will be investigated. Wavelet and nonlinear time series analysis method will be used to study the stability of combustion and propulsion process, nonlinear characteristic variables, such as correlation dimension, maximum Lyapunov exponent can be obtained. The dynamic nature of combustion and propulsion process will be illustrated and the control method of combustion stability will be explored. This research program has important academic value in the area of high temperature and high pressure transient combustion theory and experimental technology.

英文关键词： Electrothermal plasma jet;liquid propellant;nonlinear dynamics;combustion stability control