腹部进气高超声速内转式进气道波系配置及其气动特性研究

项目名称： 腹部进气高超声速内转式进气道波系配置及其气动特性研究

项目编号： No.91216115

项目类型： 重大研究计划

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 岳连捷

作者单位： 中国科学院力学研究所

项目金额： 82万元

中文摘要： 本项目针对高超声速内转式进气道设计存在的两方面气动问题开展研究。一、飞行器腹部进气布局下前体气流的偏转使得传统意义的轴对称基准流场理论上不再存在，且三维唇口不能乘前体激波导致溢流；二、具有较优总压恢复特性的进气道总是伴随着内收缩比过大、起动困难的问题。通过等收缩比离散流管流动构建方法的研究,发展飞行器腹部进气布局高性能内转式进气道流场设计方法，并使进气道唇口乘于前体激波。在此基础上，通过内转式进气道再起动流动过程研究，掌握影响进气道自起动特性的类燕尾形唇口关键几何特征参数及其规律，获得改善进气道自起动能力的三维唇口设计方法。开发高超声速内转式进气道设计平台，通过试验及数值仿真研究，系统总结该进气道在宽飞行工况下的气动特性，分析其与流动形态的内在关系。 本项目的开展为我国超燃冲压发动机进气道研究提供理论与技术基础，拓宽研究思路，推动我国高超声速推进研究的技术创新。

中文关键词： 内转式进气道；高超声速飞行器；一体化设计；起动特性；激波边界层干扰

英文摘要： The hypersonic inward turning inlets face two fundamental aerodynamic challenges. First, the traditional parent axisymmetric flowfield doesn''t exist theoretically due to the deflection of the forebody airflow when the inlet mounted beneath the vehicle. A spillage also occurs because the three dimensional cowl-lip cannot ride on the forebody shock. Second, the inlet optimal total-pressure recovery is always accompanied with the difficulty in self-starting due to its large internal contraction ratio. Aiming to the problems mentioned above, this project proposes a flow construction method by the iso-contraction-ratio discrete streamtube, and further develops a design methodology of hypersonic inward turning inlets beneath the vehicle, in which the cow-lip would ride on the forebody shock. In addition, the key geometric characteristic parameters of a swallow-tailed cowl associated with the inlet self-starting capability are investigated. Its flow mechanism is analyzed to obtain the method of 3-D cowl-lip design for improving the inlet self-starting capability. Finally, the flow characteristics and performance of the inward turning inlet are surveyed within a wide range of flight operation by experiments and numerical simulations. The implementation of this project can provide theoretical and technological suppo

英文关键词： inward turning inlet；hypersonic vehicle；inlet-forebody integration；inlet self-starting；shock wave boundary layer interactions