Experiment on ignition performance of a full annular combustor
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摘要:
对某型全环燃烧室进行了模拟地面起动和高空状态下的点火性能试验,研究表明:着火及联焰油气比均随燃烧室进口马赫数的增大而减小;随着模拟点火高度增加,点火变得越来越困难,特别是在试验工况中的低进口马赫数状态下;着火、联焰边界对应的油气比均随换算参考速度的增加而减小,且符合幂函数的函数形式,通过拟合得到着火、联焰边界对应的油气比与换算参考速度之间的函数关系式,经与试验值对比,着火、联焰边界预估值的误差大多分别不超过10%和15%。
Abstract:Experiments were conducted to study the ignition performance on a full annular combustor by simulating the ground start and high-altitude ignition parameters. The test results showed that the fuel-air ratio of both the stable flame establishment and the flame propagation from the ignition dome to the unburned dome decreased with the increasing inlet airflow Mach number; ignition became more and more difficult with the increase of simulating ignition height, especially at low inlet Mach number condition; the fuel-air ratio of stable flame establishment limit and the light around limit decreased with the increase of corrected reference velocity, and there was a power function relationship between them; the functional relationship was obtained by fitting; if compared with the test values, the errors of the estimated fuel-air ratio of stable flame establishment limit and light around limit were mostly less than 10% and 15%, respectively.
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表 1 主要测试设备
Table 1. Main measurement device
参数名称 测试设备 测量范围 精度 进出口压力 PSI9016 (0.2~1.5)×105 Pa ±0.5% 进口温度 K型热电偶 (−60~100)℃ ±1℃ 出口温度 B型热电偶 (100~1700)℃ ±5℃ 燃油流量 流量计 (1~100)g/s ±0.5% 空气流量 质量流量喷嘴 (0.05~2.0)kg/s ±1.0% 燃油温度 K型热电偶 (−60~100)℃ ±1℃ 表 2 点火试验状态参数
Table 2. Ignition test parameters
状态名称 进口空气流量/
(kg/s)进口空气
总温/℃进口空气
总压/kPa模拟地面起动 0.100 室温 室压 0.200 模拟4500 m 0.137 −14.3 57.7 0.206 模拟6000 m 0.073 −24.0 47.2 0.112 0.169 模拟7500 m 0.062 −33.8 38.3 0.091 0.137 模拟8500 m 0.118 −40.3 33.1 -
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