自由旋涡气动窗口全流场的数值模拟  

Numerical Simulation of the Whole Flow Field′s in Free Vortex Aerodynamic Window

作　　者：李金雪[1] 郭建增[1] 刘盛田[1] 柳琪[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《光子学报》2017年第9期200-204,共5页Acta Photonica Sinica

基　　金：国家高技术研究发展计划(No.2015AA8063032)资助~~

摘　　要：建立自由旋涡气动窗口全流场仿真模型,对大密封压比气动窗口的全流场展开数值研究,得到自由旋涡气动窗口的流场结构,发现大密封压比气动窗口形成的自由旋涡射流在光束输出通道内无明显的波系结构.根据模拟结果对自由旋涡气动窗口的性能进行优化,对自由旋涡喷管上壁面型线进行二次粘性修正.优化自由旋涡射流场后,激光器输出光束通道内压力分布稳定上升;增加扩压器外端壁吹气1.19MPa、内端壁吹气1.68MPa时,自由旋涡射流总能提高,气动窗口密封压力从37.5torr降低至6torr.该研究结果对自由旋涡气动窗口技术的发展具有参考意义.The model of the free vortex aerodynamic window with high pressure-ratio was established,and the whole flow field of the aerodynamic window was simulated.The result shows that there is no obvious wave through the export channel of the laser;with the contour of the free-vortex nozzle optimized,the shock wave behind the output of the free vortex nozzle disappeared,and the free-vortex jet flow field get better;with the boundary flow of the diffuser optimized,the total energy of the jet is heightened.The sealing pressure of the aerodynamic window is reduced from 37.5torr to 6torr.The results do effort to the free-vortex aerodynamic window＆#39;s research and development.

关 键 词：气动窗口 自由旋涡 喷管 压比 边界层 扩压器 流场 

分 类 号：V228.7[航空宇航科学与技术—飞行器设计]