自由旋涡气动窗口全流场的数值模拟
发布时间：2018-11-28 15:37
【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.
[Abstract]:The full flow field simulation model of the free vortex pneumatic window is established, and the flow field structure of the free vortex pneumatic window is obtained by numerical research on the full flow field of the large sealing pressure ratio pneumatic window. It is found that the free vortex jet formed by the pneumatic window with large sealing pressure ratio has no obvious wave system structure in the beam output channel. According to the simulation results, the performance of the free vortex aerodynamic window is optimized, and the secondary viscosity correction of the wall profile on the free vortex nozzle is carried out. When the free vortex jet field is optimized, the pressure distribution in the laser output beam channel increases steadily. When the external end wall of diffuser is increased by 1.19 MPA and the inner end wall is blown by 1.68MPa, the free vortex jet can always be increased, and the sealing pressure of pneumatic window is reduced from 37.5torr to 6torr. The results are useful for the development of free vortex aerodynamic window technology.
【作者单位】： 中国船舶重工集团公司第七一八研究所;
【基金】：国家高技术研究发展计划(No.2015AA8063032)资助~~
【分类号】：O35;TN248
，
本文编号：2363316
[Abstract]:The full flow field simulation model of the free vortex pneumatic window is established, and the flow field structure of the free vortex pneumatic window is obtained by numerical research on the full flow field of the large sealing pressure ratio pneumatic window. It is found that the free vortex jet formed by the pneumatic window with large sealing pressure ratio has no obvious wave system structure in the beam output channel. According to the simulation results, the performance of the free vortex aerodynamic window is optimized, and the secondary viscosity correction of the wall profile on the free vortex nozzle is carried out. When the free vortex jet field is optimized, the pressure distribution in the laser output beam channel increases steadily. When the external end wall of diffuser is increased by 1.19 MPA and the inner end wall is blown by 1.68MPa, the free vortex jet can always be increased, and the sealing pressure of pneumatic window is reduced from 37.5torr to 6torr. The results are useful for the development of free vortex aerodynamic window technology.
【作者单位】： 中国船舶重工集团公司第七一八研究所;
【基金】：国家高技术研究发展计划(No.2015AA8063032)资助~~
【分类号】：O35;TN248
，
本文编号：2363316
本文链接：https://www.wllwen.com/kejilunwen/dianzigongchenglunwen/2363316.html
