The crystal window of high-power laser can not work in gear because of the heat caused by absorption of high-power beam. The supersonic free-vortex segment is usually employed to seal low-pressure laser-cavity. In this article the procedures are described for determining free-vortex segment properties. Characteristics method is used to design nozzle which produces free-vortex segment.
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易仕和,姜宗福,王承尧.自由旋涡气动窗口非对称喷管的设计[J].国防科技大学学报,2000,22(5):26-28. YI Shihe, JIANG Congfu, WANG Chengyao. Preliminary Study of Asymmetric Nozzle of Free-vortex Aerodynamic Window[J]. Journal of National University of Defense Technology,2000,22(5):26-28.