Novel In-Service Combustion Instability Detection Using the Chirp Fourier Higher Order Spectra
Novel In-Service Combustion Instability Detection Using the Chirp Fourier Higher Order Spectra
复制标题
DOI：
10.36001/ijphm.2017.v8i1.2526
复制
发表时间：
2020-11
影响因子：
2.1
通讯作者：
L. Gelman;C. Parrish;I. Petrunin;M. Walters
中科院分区：
文献类型：
--
作者：
L. Gelman;C. Parrish;I. Petrunin;M. Walters
燃烧不稳定性是燃气涡轮机燃烧室中的自激气动不稳定性，称为“隆隆声”和“尖叫声”。它们导致燃气涡轮机部件的过早失效，并且因此导致燃气涡轮机作为整体的失效。由于隆隆声和尖叫现象背后的复杂物理效应，很难在设计阶段完全消除它们。因此，应特别注意燃气涡轮机中燃烧不稳定性的检测，以防止其在这种模式下长时间运行。存在能够检测燃气涡轮机中的隆隆声和尖叫声的已知技术。大多数方法没有把燃烧不稳定性看作是非线性、非平稳的事件，因而检测效率较低。本文提出了一种新的在役燃烧不稳定性检测技术。该技术克服了现有解决方案的局限性。
Combustion instabilities, known as “rumble” and “screech” are the self-excited aerodynamic instabilities in the gas turbine combustor. They cause the premature failures of the gas turbine components, and, consequently, the failure of the gas turbine as a whole. Because of the complex physical effects underlying the rumble and the screech phenomena, it is difficult to eliminate them completely at the design stage. Therefore, special attention should be paid to the detection of the combustion instabilities in the gas turbine in order to prevent its prolonged operation in this mode. There are known techniques, which are able to detect the rumble and the screech in gas turbines. Most of them do not consider the combustion instabilities as non-linear and non-stationary events and, therefore, have lower detection efficiency. Novel technique for in-service combustion instability detection is implemented in this paper. This technique overcomes the limitations of the existing solutions.