Numerical Simulations of Jet Mixing Enhancement in a Round Jet Exhaust Using SJA

2016 2nd International Conference on Mechanical and Aeronautical Engineering (ICMAE 2016)

机械制造;航空航天工程

Hong, Liang^1 ; Zhang, Rubing^1 ; Liu, Zheng^1

School of Energy and Power Engineering, Beihang University, PRC, Beijing, China^1

关键词: Axis transformations;    High temperature;    Jet mixing enhancement;    Mixing enhancement;    Nozzle diameter;    Potential temperature;    Streamwise vortices;    Synthetic jets;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/187/1/012013/pdf
DOI  :  10.1088/1757-899X/187/1/012013

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Symmetric synthetic jet is used to stimulate a Mach number 0.9 and high temperature jet for the mixing enhancement. The movement of the piston-type synthetic jet is simulated by dynamic mesh based on URANS numerical methods. Jet flapping, streamwise vortex and geometric axis transformation are the jet mixing mechanism. However, the jet mixing enhancement effect depends on penetration area, which consists of penetration depth and spanwise. And the penetration area is determined by actuator nozzle diameter and blowing jet momentum. In addition, a 54% reduction in potential core length and maximum 45.8K decrease in potential temperature are achieved.