Flow Visualization of Supersonic Flow over a Finite Cylinder

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2012,（8）
• 页码范围: 156-159
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/29/8/084702

摘要

The flow structures of a supersonic flow over a cylinder with a finite height are investigated using the method of flow visualization with nanoparticle-based planar laser scattering (NPLS),in a supersonic quiet wind tunnel at Ma =2.68.The complex structures of shock waves and three-dimensional vortices in a supersonic flow over a finite cylinder are visualized.Based on the time correlation of NPLS images,the time-space evolutionary characteristics of the coherent structures in a supersonic flow over a finite cylinder are studied,and the evolutionary characteristics of the coherent structure in the flow direction are obtained,which are used to identify the model and rotation direction of shedding vortices.