A review of bias flow liners for acoustic damping in gas turbine combustors
A review of bias flow liners for acoustic damping in gas turbine combustors
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DOI：
10.1016/j.jsv.2017.04.005
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发表时间：
2017-07
影响因子：
4.7
通讯作者：
Claus Lahiri;F. Bake
中科院分区：
文献类型：
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作者：
Claus Lahiri;F. Bake
在现代燃气轮机和航空发动机中，偏流衬套的优化设计是发展低排放燃烧系统的关键。偏流衬管的研究有着相当长的历史，涉及到各种不同偏流和掠流条件下偏流衬管的参数依赖性以及模拟偏流衬管声学行为的方法。为了建立一个概述了最先进的，本文提供了一个全面的审查有关发表的研究偏流班轮和建模方法与广泛的研究，最相关的参数确定这些班轮的声学行为。本文首先对偏流吸收原理的表征进行了历史性的描述。这份按时间顺序排列的纲要根据该领域最近和正在进行的发展进行了扩展。在下一步骤中的基本声学性能的偏流衬在壁阻抗方面的介绍和不同的推导和公式，这个阻抗产生不同的出版模型描述进行解释和比较。最后，参数研究揭示了最相关的参数的声阻尼行为的偏流衬，这是如何反映的各种模型表示。虽然所研究的声学行为的一般趋势被捕获的不同的模型相当好地为一定范围的参数，在谐振占主导地位和纯粹的偏流相关制度之间的过渡区域中，所有的模型缺乏正确的阻尼预测。这似乎与作为偏流马赫数的函数的电抗的正确实现有关。
The optimized design of bias flow liner is a key element for the development of low emission combustion systems in modern gas turbines and aero-engines. The research of bias flow liners has a fairly long history concerning both the parameter dependencies as well as the methods to model the acoustic behaviour of bias flow liners under the variety of different bias and grazing flow conditions. In order to establish an overview over the state of the art, this paper provides a comprehensive review about the published research on bias flow liners and modelling approaches with an extensive study of the most relevant parameters determining the acoustic behaviour of these liners. The paper starts with a historical description of available investigations aiming on the characterization of the bias flow absorption principle. This chronological compendium is extended by the recent and ongoing developments in this field. In a next step the fundamental acoustic property of bias flow liner in terms of the wall impedance is introduced and the different derivations and formulations of this impedance yielding the different published model descriptions are explained and compared. Finally, a parametric study reveals the most relevant parameters for the acoustic damping behaviour of bias flow liners and how this is reflected by the various model representations. Although the general trend of the investigated acoustic behaviour is captured by the different models fairly well for a certain range of parameters, in the transition region between the resonance dominated and the purely bias flow related regime all models lack the correct damping prediction. This seems to be connected to the proper implementation of the reactance as a function of bias flow Mach number.