排序方式: 共有103条查询结果,搜索用时 15 毫秒
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Zongmin Hu Junming Lā Zonglin Jiang Rho-Shin Myong Tae-Hwan Cho 《Acta Mechanica Sinica》2008,24(2):133-142
Laser performance is greatly dependent on its operating conditions due to the strong coupling among multi- physics such as gas-dynamics, chemical reaction kinetics and optics in the mixing nozzle of COIL. In this paper, 3D CFD technology is used to simulate the mixing and reactive flow of subsonic cross jet scheme at different conditions. Results obtained show that the jet penetration depth plays a dominant role in the spatial distribution of small signal gains. In the case of over-penetration, unsteady flow structures are induced by impinging between the opposing jets. The optimum spatial distribution of the chemical performance cannot be obtained even if the full penetration condition is achieved through the subsonic transverse jet mixing scheme in the COIL nozzle flow. 相似文献
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通过采用Cl2流量250mmol/s列管射流式氧发生器的COIL出光实验,得到了激光输出功率随碘副气流相对于氧主气流混合穿透深度的变化规律。实验结果表明,穿透深度对激光功率影响较大,存在最佳穿透深度,约为3.16mm,计算的最佳穿透深度与实验得到的最佳穿透深度基本一致。通过逐步改变供碘系统的碘气流流量,测量激光的输出功率,在实验上证实并找到了COIL的最佳碘流量值,约为4.5mmol/s,这一结果比以往文献所登载的最佳碘流量值要确切。 相似文献
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超音速氧碘化学激光一维预混模型 总被引:1,自引:0,他引:1
本文考虑了DOIL体系中关键的化学动力学过程,建立了一维预混简化模型,计算了超音速COIL中小信号增益、输出功率、体积比功率、化学效率等参量随腔压、腔温、工作物质配比的变化,并给出了超音速COIL最佳工作条件。 相似文献
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Jarmila Kodymová Otomar Špalek Vít Jirásek Miroslav Čenský 《Czechoslovak Journal of Physics》2004,54(5):561-574
Results of three problems investigated on a Chemical Oxygen-Iodine Laser (COIL) in our laboratory are presented in connection with the advanced COIL development in the world. These problems concern: i) A gain modulation on the laser transition in iodine atom, I(2P1/2) - (2P3/2), by external magnetic field, and its utilization for a COIL output power stabilization, ii) An evaluation of the Einstein A-coefficient of singlet oxygen, O2(1 g), and its utilization in advanced diagnostics for O2(1 g) determination in COIL operation, iii) A chemically driven iodine atom delivery system for advanced COIL. 相似文献