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Experimental study on the effects of simulated flight conditions on ignition and flame stabilization in a supersonic combustor

机译：模拟飞行条件对超声燃烧室点火和火焰稳定效果的实验研究

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摘要

Effects of simulated flight conditions on ignition and flame stabilization in a kerosene fueled scramjet combustor were experimentally investigated in the present paper. Simulated flight conditions were Mach 4.5 and Mach 4.0, and the isolator entrance Mach number was 2.0. Wall pressure and flame emission were made during the experiments in an attempt to better understand the combustion characteristics, air throttling was used to enhance the flame stabilization. The results showed that, the kerosene ignition was achieved successfully under the Mach 4.5 flight condition, that of Mach 4.0 flight condition was blowout before the kerosene pressure reached the max pressure. The flame in the combustor without air throttling during Mach 4.0 flight condition only existed in the cavity and near the top wall before it was blown off, that of Mach 4.5 flight condition had spread into the isolator. The flame stabilization was also only achieved under the Mach 4.5 flight condition with the aid of air throttling, the flame in the combustor with air throttling during the Mach 4.0 flight condition was blowout before the throttling air was removed. Ignition and flame stabilization were easy to be achieved under the higher flight condition. (C) 2019 Elsevier Masson SAS. All rights reserved.
机译：实验研究了模拟飞行条件对煤油燃料炒壳燃烧器中点火和火焰稳定的影响。模拟飞行条件是Mach 4.5和Mach 4.0，隔离器入口Mach数为2.0。在实验期间制作壁压和火焰排放，以便更好地了解燃烧特性，使用空气节流来增强火焰稳定性。结果表明，在马赫4.5飞行条件下成功实现了煤油点火，在煤油压力达到最大压力之前，马赫4.0飞行条件的井喷。燃烧器中的火焰在没有空气节流的情况下，在Mach 4.0期间仅存在于腔体中并且在顶部壁附近吹过顶部壁附近，马赫4.5飞行条件的飞行条件蔓延到隔离器中。借助于空气节流，在马赫4.5飞行条件下也仅实现了火焰稳定化，在马赫4.0飞行条件下，燃烧器中的火焰在管4.0飞行条件下吹出。在较高的飞行条件下，易于实现点火和火焰稳定。 （c）2019年Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2019年第8期|474-478|共5页
  • 作者

    Li Lang; Qiao Wenyou;

  • 作者单位

    Southwest Univ Sci & Technol Sichuan Civil Mil Integrat Inst Mianyang 621000 Sichuan Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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