Experimental results from a high performance Froth Singlet Oxygen Generator (FSOG)

G. Emanuel, D. King, J. Zimmerman, J. Camp, D. L. Carroll
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Abstract

This paper presents the development and initial experimental testing of a new compact, high-performance singlet oxygen generator (SOG). The generator uses a centrifugal design to assist in two-phase separation, a porous plate injection technique to create a froth and maximize chlorine utilization, and a closely coupled minimum length nozzle (MLN) to minimize transport losses. A high froth speed in the curved wall region is essential in order to attain a significant centrifugal force that pins the liquid component to the curved wall, which consequently results in a rapid and efficient separation of the vapor containing the excited oxygen that then flows into the nozzle. This generator operates without diluent and was demonstrated to perform at pressures greater than 350 Torr, which enables the technology to operate without the need for a pressure recovery system in an airborne chemical oxygen-iodine laser (COIL). The implementation of this froth SOG (FSOG) in combination with the use of a MLN allows the generation of large number densities of excited oxygen at a very high plenum pressure without the use of any diluent. Experimental results for this novel FSOG, along with the engineering logic behind it, are presented. Number densities greater than 5.3×1017 cm–3 were measured via calibrated spectroscopic analysis of the O2(1 Δ) emission about 1268 nm at the exit of a supersonic nozzle. To the authors’ knowledge, the FSOG produced a higher pressure and larger excited oxygen number density than any other SOG system reported.
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高性能泡沫单线态氧气发生器的实验结果
本文介绍了一种新型紧凑型高性能单线态氧气发生器(SOG)的研制和初步实验测试。该发生器采用离心设计来辅助两相分离,采用多孔板喷射技术来产生泡沫并最大限度地利用氯,并采用紧密耦合的最小长度喷嘴(MLN)来最大限度地减少输送损失。为了获得将液体成分固定在弯曲壁上的显著离心力,在弯曲壁上的高泡沫速度是必不可少的,从而导致快速有效地分离含有激发氧的蒸汽,然后流入喷嘴。该发生器在没有稀释剂的情况下运行,并且在大于350 Torr的压力下运行,这使得该技术在机载化学氧碘激光器(COIL)中无需压力回收系统即可运行。这种泡沫SOG (FSOG)的实现与MLN的使用相结合,可以在非常高的充气压力下产生大量密度的激发态氧,而无需使用任何稀释剂。本文给出了这种新型FSOG的实验结果,以及其背后的工程逻辑。通过对超声速喷管出口约1268 nm处O2(1 Δ)发射的校准光谱分析,测量了大于5.3×1017 cm-3的数密度。据作者所知,与其他SOG系统相比,FSOG产生了更高的压力和更大的激发氧数密度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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