【摘要】 本文介绍了喷管喉道高度为0.3毫米、面积比为30的燃烧驱动CO₂气动激光器的某些实验结果。研究了小讯号增益系数G₀随CO₂和H₂O组分变化的规律,与喷管喉道高度为0.8毫米、面积比为17的同类装置实验数据进行比较,可以看出小喉道、大面积比喷管的气动激光器有一定的优越性,小讯号增益G₀能提高百分之五十,适用水分可从百分之一增加到百分之五。更多还原

【Abstract】 This paper describes a combustion-driven CO2 gasdynamic laser with a throat height of 0.3mm and an area-ratio 30 grid nozzles, and presents some experimental results. The behaviour of flow and the location of shock waves in the optical cavity were observed. The variation in small-signal gain Go with CO2 or H2O contents were measured and compared with the experimental data from similar equipment of nozzle throat height 0.8 mm and area-ratio 17. Some advantages are obvious for the narrower throat height and higher area-ratio GDL, i.e. the Go can be increased by a factor of 50% and the H2O contents may be increased from 1% to 5%.更多还原