DBD低温等离子体控制下前台阶流动的数值模拟  

Numerical simulation of a front step flow controlled by DBD plasma

作　　者：王建明 李润青[1,2] 王成军 WANG Jian-ming;LI Run-qing;WANG Chen-jun(College of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China;Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空发动机学院,沈阳110136 [2]沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室,沈阳110136

出　　处：《沈阳航空航天大学学报》2021年第5期1-7,共7页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:51476106)。

摘　　要：为了研究DBD(介质阻挡放电)低温等离子发生器对前台阶流动分离(钝体绕流经典问题之一)的控制效应,利用Fluent软件中的用户自定义函数UDF功能,将等离子体的作用效果以体积力源项的形式添加进N-S方程,对前台阶流动进行数值模拟。结果表明,在来流20 m/s的情况下,通过开启布置在台阶上表面的等离子体发生电极,台阶壁面上的流动分离得到有效控制,分离区减小80%左右。In order to explore the control effect of DBD(Dielectric Barrier Discharge)low-temperature plasma generator on a front step flow separation,which is one of the classic problems of bluff body flow around,the user-defined function UDF function in the Fluent software was used to convert the plasma effect in the form of a volume force source term which added the N-S equation to numerically simulate the flow of the front step.The results show that the flow separation on the step wall can be effectively controlled by DBD on the upper wall at the flow velocity of 20m/s,and the separation area can be reduced by about 80%.

关 键 词：前台阶流动 等离子体流动控制 流动分离 分离区长度 用户自定义函数 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]