首页> 外文期刊>Combustion Science and Technology >INJECTION OF FLUIDS INTO SUPERCRITICAL ENVIRONMENTS
【24h】

INJECTION OF FLUIDS INTO SUPERCRITICAL ENVIRONMENTS

机译:将流体注入超临界环境

获取原文
       

摘要

This paper summarizes and compares the results of systematic research programs at two independent laboratories regarding the injection of cryogenic liquids at subcritical and supercritical pressures, with application to liquid rocket engines. Both single jets and coaxial jets have been studied. Cold flow studies provided valuable information without introducing the complexities of combustion. Initial studies utilized a single jet of cryogenic nitrogen injected into a quiescent room temperature nitrogen environment with pressures below and above the thermodynamic critical pressure of the nitrogen. Later, the work was extended to investigate the effects of a co-flowing gas. Parallel to this work, combustion studies with cryogenic propellants were introduced to understand high pressure coaxial injection phenomena with the influence of chemical reaction. Shadowgraphy and spontaneous Raman scattering were used to measure quantities such as growth rates, core lengths, turbulent length scales, fractal dimensions, and jet breakup regimes. It is found that jets injected at supercritical pressures do not atomize as they do at subcritical pressures. Rather, they behave in many respects like variable density turbulent gas jets.
机译:本文总结并比较了两个独立实验室关于在亚临界和超临界压力下注入低温液体的系统研究计划的结果,并将其应用于液体火箭发动机。已经研究了单喷嘴和同轴喷嘴。冷流研究在不引入燃烧复杂性的情况下提供了有价值的信息。最初的研究利用注入低温氮气的单次喷射到静态室温氮气环境中,压力低于和高于氮气的热力学临界压力。后来,这项工作扩展到研究同流气体的影响。与此工作并行,引入了低温推进剂的燃烧研究,以了解在化学反应影响下的高压同轴喷射现象。阴影照相法和自发的拉曼散射被用于测量诸如生长速率,岩心长度,湍流尺度,分形维数和射流破裂状态等量。发现在超临界压力下喷射的射流不会像在亚临界压力下那样雾化。而是,它们在许多方面表现得像可变密度的湍流气体射流。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号