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氧碘混合过程是化学氧碘激光器(COIL)中的一个重要步骤,氧碘混合质量直接决定着COIL的运行效率和光束质量。采用化学荧光法,研究了两种不同结构的扰动翼片组对COIL超音速平行流混合过程的影响。实验结果表明,1#扰动翼片组对氧碘超音速平行流的混合增强效果明显,其荧光区达到主气流中心线所经历的流向距离大幅缩短,碘解离区内的荧光区与测试区的面积比相对于无混合扰动时提高了4.2倍;采用2#翼片组扰动混合时,流向距离值进一步缩短了40%~60%,碘解离区内的面积比值又提高了20%~40%。氧发生器有/无主载气条件(2#翼片组)下的混合过程比较显示后者混合效果更好。
Oxygen-iodine mixing is an important step in chemical oxygen-iodine laser (COIL). The quality of oxygen-iodine mixing directly determines the operational efficiency and beam quality of COIL. Using chemical fluorescence method, the influence of two different types of disturbance foil sets on the COIL supersonic parallel flow mixing process was studied. The experimental results show that the mixing effect of supersonic parallel flow of oxygen iodine is obviously enhanced by 1 # disturbance airfoil group, and the distance between the fluorescent region and the centerline of the main air flow is greatly shortened. The fluorescence region in the iodine dissociation region and the test region 4.2 times higher than that of the unmixed disturbance. When the 2 # airfoil is disturbed and mixed, the flow distance is further shortened by 40% -60% and the area ratio in the iodine dissociation zone is increased by 20% ~ 40%. The mixing process under the oxygen generator with / without primary carrier gas conditions (2 # wing set) shows that the latter mixes better.