Fine Structures of Supersonic Laminar Flow over a Backward Facing Step at Ma=3.0,3.8
Supersonic flows over a BFS often occur in the flow field around supersonic aircrafts and inside engines. And it takes an important role in optimizing the aircraft design and stabilizing the engine fire . In the past several decades, there were large numbers of studies on the mechanism of separated and reattaching flows experimentally and numerically. To study flow structures by flow visualization, techniques such as schlieren, shadow and interference were usually adopted. G.X. Shen and G.Y. Ma (1996) used WBIV (White-light Bubble Image Velocimetry) to measure the structures of starting vortices and found 4 stages in this process . Akiko and Masahiko (1998) studied the supersonic flow over BFS with a normal injection using the numerical method and shadow technique and found that fierce reaction between injection and recirculation region was distinct .
KeywordsTurbulent Boundary Layer Compression Wave Expansion Wave Recirculation Region Free Shear Layer
Unable to display preview. Download preview PDF.
- 1.Neumann, J., Wengle, H.: DNS and LES of Passively Controlled Turbulent Backward-Facing Step FlowFlow. Turbulence and Combustion J., 71297–71310 (2003)Google Scholar
- 3.Akiko, M., Masahiko, M.: Flow structure of supersonic flow past backward-facing step with perpendicular injector. AIAA-98-0939 (1998)Google Scholar