Response of generic swirl flames to transverse acoustic forcing

本项目是关于旋流稳定预混火焰对横向声强迫响应的实验研究，该实验在专用的横向声强迫试验台上进行。这项研究背后的动机是探索支配流动-火焰-声学相互作用的复杂物理。除了提供对自然界中存在的、在过去引起重大科学兴趣的基本物理相互作用的见解外，这项研究还将提供对处理现代环形燃气轮机热声不稳定性问题至关重要的信息。所提出的方法包括研究在一系列控制参数下运行的各种可能的横向声强迫配置对旋流火焰的影响，这些参数被关键地选择以确定参与相互作用的各个物理过程的重要性。这些调查是基于涉及详细流动和火焰诊断的实验。简而言之，量化火焰对横向强迫的反应和建立管理火焰反应的物理机制是该项目的目标。

This project deals with experimental investigations on the response of a swirl-stabilized premixed flame to transverse acoustic forcing conducted on a specialized transverse acoustic forcing test-rig. The motivation behind the proposed study is to probe into the complex physics governing flow-flame-acoustics interaction. In addition to providing insights into a fundamental physical interaction that exists in nature and which has attracted significant scientific interest in the past, the study will also provide information crucial to dealing with the issue of thermoacoustic instability in modern annular gas turbine engines. The proposed methodology involves studying the effect of various possible configurations of transverse acoustic forcing on the swirl flame operated at a range of control parameters, chosen critically to identify the importance of individual physical processes involved in the interaction. The investigations are based on experiments involving detailed flow and flame diagnostics. Briefly stated, quantification of flame response to transverse forcing and establishing physical mechanisms that govern flame response constitute the aims of the project.