Prediction of Combustion Noise for an Aeroengine Combustor
Prediction of Combustion Noise for an Aeroengine Combustor
复制标题
航空发动机燃烧室燃烧噪声的预测
DOI：
10.2514/1.b34857
复制
发表时间：
2014
影响因子：
1.9
通讯作者：
L. Caracciolo
中科院分区：
文献类型：
--
作者：
Yu Liu;A. Dowling;N. Swaminathan;R. Morvant;M. Macquisten;L. Caracciolo
燃烧噪声可能成为贫燃燃气涡轮机发动机的重要噪声源，并且这种噪声通常与高度不稳定的火焰相关联。本文的目的是计算一个实际的航空发动机燃烧室的宽带燃烧噪声谱，并与一个验证机航空发动机的测量噪声数据进行比较。一个低阶线性网络模型应用于演示发动机燃烧室，以获得与热释放率、声学、熵和涡流波动的不稳定性有关的传递函数。一个频谱模型用于热释放率波动，这是噪声的来源。作为该谱模型输入数据的航空发动机燃烧室的平均流场由雷诺平均的Navier-Stokes模拟获得。计算的低到中等功率设置的声场表明，在这项研究中使用的模型捕获的燃烧噪声的宽带频谱形状的主要特征。合理的协议…
Combustion noise may become an important noise source for lean-burn gas turbine engines, and this noise is usually associated with highly unsteady flames. This work aims to compute the broadband combustion noise spectrum for a realistic aeroengine combustor and to compare with available measured noise data on a demonstrator aeroengine. A low-order linear network model is applied to a demonstrator engine combustor to obtain the transfer function that relates to unsteadiness in the rate of heat release, acoustic, entropic, and vortical fluctuations. A spectral model is used for the heat release rate fluctuation, which is the source of the noise. The mean flow of the aeroengine combustor required as input data to this spectral model is obtained from Reynolds-averaged Navier–Stokes simulations. The computed acoustic field for a low-to-medium power setting indicates that the models used in this study capture the main characteristics of the broadband spectral shape of combustion noise. Reasonable agreement with...
湍流预混火焰的热释放率和声发射的空间相关性
影响因子：
4.4
作者：
Liu Y
通讯作者：
Liu Y