【摘要】：建立自由旋渦氣動窗口全流場仿真模型,對大密封壓比氣動窗口的全流場展開數(shù)值研究,得到自由旋渦氣動窗口的流場結構,發(fā)現(xiàn)大密封壓比氣動窗口形成的自由旋渦射流在光束輸出通道內(nèi)無明顯的波系結構.根據(jù)模擬結果對自由旋渦氣動窗口的性能進行優(yōu)化,對自由旋渦噴管上壁面型線進行二次粘性修正.優(yōu)化自由旋渦射流場后,激光器輸出光束通道內(nèi)壓力分布穩(wěn)定上升;增加擴壓器外端壁吹氣1.19MPa、內(nèi)端壁吹氣1.68MPa時,自由旋渦射流總能提高,氣動窗口密封壓力從37.5torr降低至6torr.該研究結果對自由旋渦氣動窗口技術的發(fā)展具有參考意義.
[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.
【作者單位】： 中國船舶重工集團公司第七一八研究所;
【基金】：國家高技術研究發(fā)展計劃(No.2015AA8063032)資助~~
【分類號】：O35;TN248
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本文編號：2363316