二次喉道扩压器对COIL的影响实验
Experimental study on influence of secondary-throat diffuser on COIL
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摘要: 氧碘化学激光器分别采用二次喉道扩压器和8°扩压器时，对在不同阀门开度下的气流方向的壁面静压曲线和背压曲线，光轴壁面静压曲线，出口总压与上游压比值曲线，输出功率曲线进行了测量。对两种扩压器的数据进行了对比，结果表明：与8°扩压器相比，二次喉道扩压器能够有效隔离扩压器下游气流对光腔的干扰，显著减小捩区长度，并将转捩区控制在扩压器内。在激光器背压升高时，二次喉道扩压器的稳定性更强。Abstract: A secondary-throat diffuser and an 8°diffuser are used respectively on COIL. The performance parameters of the two diffusers are measured and compared. The result indicates that the secondary-throat diffuser may effectively insulate the flow disarrangement from the diffuser, avoid the down-stream flow disarrangement into the optical resonator, improve the stability of static-pressure in resonator, and enhance the stability of the output power of COIL. The secondary-throat diffuser is propitious to COIL at high back-pressure.
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Key words:
- coil /
- resonator /
- diffuser /
- stagnation pressure loss /
- pressure recover
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