模型燃气轮机燃烧器燃料分级的实验研究

2019/07/17   下载量： 0 次

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应用领域 能源/新能源
检测样本 天然气/燃气
检测项目
参考标准 暂无

采用Lavision公司的高速相机和像增强器IRO，以及DaVis8.3.1软件平台，构成一套平面激光诱导荧光测量系统。测量了OH自由基的平面激光诱导荧光。对模型燃气轮机燃烧器燃料分级进行了实验研究。

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Modern gas turbine engines are typically operated in a lean-premixed configuration in order to meet emissions requirements. Lean operation makes gas turbines more susceptible to combustion instability, which can cause catastrophic hardware failure if left unchecked. The spatially uneven distribution of fuel in a gas turbine combustor, known as fuel staging, is an effective way of suppressing instabilities. This dissertation examines the effect of both steady-state and transient fuel-staging in a model gas turbine combustor. First, the steady-state effect of fuel staging on nominally unstable operating conditions is examined. At 200 degrees Celsius and a bulk flow velocity of 26 m/s, the combustor undergoes self-excited instabilities when the equivalence ratio is between  = 0.70 and  = 0.74 when all nozzles are fueled equally. These instabilities are suppressed when the center nozzle equivalence ratio is increased to Staging = 0.85 and the outer nozzle equivalence ratio maintained at  = 0.70
or when the global equivalence ratio is maintained at  = 0.70 by increasing the center nozzle equivalence ratio to Staging = 0.74 and decreasing the outer nozzle equivalence ratio to Staging = 0.69. The staged p0 RMS amplitudes are found to decrease with increasing equivalence ratio and the damping rates found to increase with increasing equivalence ratio.

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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