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Influence of Ignition Channel on the Ignition Performance of Ignition Device

机译：点火通道对点火装置点火性能的影响

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摘要

Based on relative theories of gas dynamics and computational fluid dynamics, the flow field computation software ANSYS Fluent was used to simulate the steady flow field of the solid type ignition device of liquid-propellant rocket engine in two working conditions (condition I: without ignition channel, condition II: with ignition channel). On this basis, the influence of ignition channel on the working characteristics of the solid type ignition device of the liquid-propellant rocket engine was analyzed and experimentally tested. The results showed that when the pressure in the combustion chamber was atmospheric pressure, under condition II, the gas velocity at the throat of the ignition device did not reach the sonic velocity, and the position of sonic velocity moved to the downstream section of the ignition channel. Compared to condition I, the gas velocity and energy at the ignition outlet increased, which would be beneficial for initial ignition, and the gas pressure and temperature at the throat increased as well, indicating that the structural strength at the throat should be evaluated. The gas flow, gas pressure, and gas temperature at the ignition outlet decreased compared to working condition I, yet the changes were small and would have minimal effect on the ignition performance. During the pressure increase process in the combustion chamber, the gas pressure, velocity, temperature, flow, and energy at the ignition outlet experienced a steady stage in both working conditions before coming to an inflection point. The inflection point under condition II is smaller than that under condition I. To improve the ignition reliability, the working pressure of the ignition device should be further increased.
机译：基于气体动力学和计算流体动力学的相关理论，使用流场计算软件ANSYS Fluent模拟了液体推进火箭发动机的固体点火装置在两种工况下的稳态流场（条件I：无点火通道） ，条件II：带有点火通道）。在此基础上，分析并试验了点火通道对液体火箭发动机固体点火装置工作特性的影响。结果表明，当燃烧室中的压力为大气压时，在条件II下，点火装置的喉部气体速度未达到声速，声速位置移至了点火的下游部分。渠道。与条件I相比，点火出口处的气体速度和能量增加，这将有利于初次点火，并且喉部的气体压力和温度也增加，这表明应评估喉部的结构强度。与工作条件I相比，点火出口处的气体流量，气压和气体温度降低，但是变化很小，并且对点火性能的影响最小。在燃烧室中的增压过程中，点火出口处的气压，速度，温度，流量和能量在到达拐点之前在两种工作条件下均处于稳定阶段。条件II下的拐点小于条件I下的拐点。为了提高点火可靠性，应进一步提高点火装置的工作压力。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第6期|4270790.1-4270790.14|共14页
  • 作者

    Chang Jiang; Wu Gongping; Tang Hanwei;

  • 作者单位

    Wuhan Univ, Sch Power & Mech Engn, 299 Bayi Rd, Wuhan 430072, Hubei, Peoples R China;

    Wuhan Univ, Sch Power & Mech Engn, 299 Bayi Rd, Wuhan 430072, Hubei, Peoples R China;

    CASIC, Fourth Res Acad, 50 Beijing Rd, Xiaogan 432100, Hubei, Peoples R China;

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