Inverse design of shock wave distortion for a direct-connect facility
Inverse design of shock wave distortion for a direct-connect facility
复制标题
DOI：
10.1016/j.ast.2016.06.003
复制
发表时间：
2016-08
影响因子：
5.6
通讯作者：
K. Yu;Jinglei Xu;Xiaofei Zhang;Shun Liu
中科院分区：
文献类型：
--
作者：
K. Yu;Jinglei Xu;Xiaofei Zhang;Shun Liu
直连装置是研究超燃冲压发动机的重要实验设备，已成为高超声速飞机研究的主要重点。由于其研究周期短、投资少、收入高，这种类型的设备被用来进行隔离器/燃烧器研究中的测量。该设备的主要功能是重现超燃冲压发动机进气口在自由喷气试验或飞行试验期间产生的扭曲。许多研究认为，冲击波是影响变形的关键因素。本文基于特征线法(MOC)，对冲击波变形进行了直接模拟。在确定了冲击波靶线的参数后，可以使用基于MOC的程序生成装置的激波和流动路径。描述了设计思想的细节，并借助计算流体力学在两个案例中验证了所提出的方法的稳健性和准确性。最后，根据提出的方法设计了一个具体的设施。马赫数和压力的相对误差很小，能够满足实验的要求。该设施还利用了作者在先前的研究中提出的扩展概念，成功地解决了启动问题。
Direct-connect facilities are very important experimental equipment for studying scramjets that have become the primary focus of research on hypersonic aircraft. Because of its short research cycle, minimal investment, and high revenue, this type of facility is used to conduct measurements in isolator/combustor studies. The principal function of the facility is to reproduce the distortions generated by the scramjet inlet during free jet experiments or flight tests. Many researches consider that the shock wave is the crucial factor influencing distortion. In this study, which is based on the Method of Characteristics (MOC), direct simulation of the shock wave distortion is presented. After specification of the parameters of the target line across the shock wave, the shock wave and flow path of the facility can be generated using the code based on MOC. The details of the design philosophy are described and the robustness and accuracy of the proposed method are verified in two cases with the aid of computational fluid dynamics. Finally, a specific facility is designed according to the proposed method. The relative errors of the Mach number and pressure are small enough to satisfy the requirements of the experiments. The facility also utilizes the expansion concept proposed by the authors in a previous study to address the starting problem successfully.