摘要
采用计算流体力学时间相关法求解二维轴对称Navier Stokes方程,数值模拟求解了二维轴对称超声速环型空气引射器流场。在前期工作基础上,探讨了零二次流时盲腔压强平衡的机理和二次流对引射器真空度的影响。计算表明,二次流对引射器的流场结构影响显著,与零二次流相比,少量的二次流将使引射器真空度大大下降。
The timedependent method of the computational fluid dynamics is applied to solving the 2dimensional axisymmetric NavierStokes equations, and the flowfields of the 2dimensional axisymmetric annular supersonic airejectors are simulated. Based on the previous work, the balance mechanism of the blindcavity is considered and the effect of the secondflow on the ejected vacuum is discussed. It's found that the existence of secondflow has an important effect on the flowfield structure of the ejector, and that in comparison with the zerosecondflow condition, a little of the secondflow will reduce the ejector vacuum remarkably.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2003年第3期6-9,共4页
Journal of National University of Defense Technology
基金
国家部委基金项目资助
关键词
超声速引射器
超声速环型引射器
二次流
数值模拟
supersonic ejector
annular supersonic ejector
second flow
numerical simulation