Here, a procedure that uses in-situ data recorded by two microphones placed inside an operating gas turbine combustor to determine the reflection coefficient is proposed. The procedure is validated against previously reported results and further employed to determine the coefficients of feeding lines supplying a partially premixed gas turbine combustor. With the help of lumped network code, a prediction analysis of combustion instability in a combustor is also conducted using the measured reflection coefficients, R(ω), which are a function of frequency. The prediction results are compared with those from other acoustic boundaries, including both analytical models and a measured single-valued approach. The predictions, based on R(ω), are shown to be more accurate than those from any other boundary methods considered. A comparison of the predicted combustion instability frequencies from this study with corresponding experimental results shows that the developed procedure for determining the coefficient is reliable and has great potential.

在这里，提出了一种使用由放置在运行中的燃气轮机燃烧器内的两个麦克风记录的原位数据来确定反射系数的程序。该程序根据先前报告的结果进行验证，并进一步用于确定供应部分预混燃气轮机燃烧器的进料管线的系数。在集总网络代码的帮助下，还使用测量的反射系数R ( ω )对燃烧器中的燃烧不稳定性进行预测分析，R ( ω ) 是频率的函数。将预测结果与来自其他声学边界的预测结果进行比较，包括分析模型和测量的单值方法。预测，基于R ( ω)，被证明比所考虑的任何其他边界方法更准确。将本研究中预测的燃烧不稳定频率与相应的实验结果进行比较表明，确定系数的开发程序是可靠的，具有很大的潜力。