无加热氧碘化学激光器超音速喷管
Non-heating supersonic nozzle for COIL
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摘要: 针对氧碘化学激光器的金属喷管在使用过程中需加热保温且存在结构复杂、故障率高等问题，初步选择了几种可用于加工无加热喷管的非金属材料，并以kW级氧碘化学激光器为原型，以聚酰亚胺为例，对激光器运行条件下的喷管温度场进行数值模拟,以验证此种非金属无加热喷管的可行性。结果表明：与金属喷管相比，非金属喷管在不加热保温的情况下能够有效阻止热量传递，防止碘蒸气冷却凝结，满足激光器喷管的使用要求。Abstract: The metallic supersonic nozzle of chemical oxygen-iodine laser(COIL) needs heating to keep warm in use, which makes its structure complicated and the failure rate is high. Several materials are considered to be suitable for fabricating non-heating supersonic nozzles. As an example, the temperature field of the nozzle made of polyimide is simulated numerically to verify the feasibility of the non-metallic non-heating nozzle. The results indicate that the nozzle made of polyimide can prevent heat transmitting and iodine vapor cooling effectively and meet the requirements of laser nozzles.
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Key words:
- chemical oxygen-iodine laser /
- polyimide /
- supersonic nozzle /
- temperature field /
- iodine vapor
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