Influence of the Acoustic Liner in Large Eddy Simulation of Longitudinal Thermoacoustic Instability in a Model Annular Combustor

作     者：MENG Sheng ZHANG Man GAO Yi MENG Sheng;ZHANG Man;GAO Yi

作者机构：AECC Commercial Aircraft Engine Co.Ltd.Shanghai200241China School of Aeronautics and AstronauticsShanghai Jiao Tong UniversityShanghai200240China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2024年第33卷第2期

页      面：710-724页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 

基　　金：financially supported by the Natural Science Foundation of Shanghai (Grant No.22ZR1467900) the National Natural Science Foundation of China (Grant No.52076136 and U2141221) the National Major Science and Technology Project of China (Grant No.J2019-Ⅲ-0002-0045) 

主　　题：thermoacoustic instability acoustic liner Large Eddy Simulation low-order modeling 

摘      要：Although extensive efforts have been made to dampen the thermoacoustic instability,successfully controlling the pressure oscillations in modern gas turbines or aeroengines remains *** influence of the acoustic liner on the longitudinal thermoacoustic mode in a model annular combustor is investigated by Large Eddy Simulation(LES) in this *** result of the self-excited longitudinal thermoacoustic instability without the liner agrees well with the frequency and acoustic analysis of the pressure mode based on experimental *** different bias flow velocities of the liner located downstream of the combustor are then *** results reveal that the existence of the liner influences not only the acoustic field but also the flow *** the bias velocity is large,it leads to intense turbulence-induced fluctuations,and the pressure oscillation is modulated *** shows that the weak coupling between flow and pressure oscillations plays a significant role in the onset of the intermittency of a thermoacoustic *** on the dynamic analysis of the thermoacoustic system with the acoustic liner,this intermittency is caused by the influence of the flow field on the flame-acoustic ***,a low-order modeling method based on Van der Pol(VdP) oscillator with additive stochastic forcing is conducted to reproduce the evolving dynamics of the thermoacoustic *** the numerical cases demonstrated in this work are relatively simpler than those in a practical combustion system,the results are helpful for us to understand the effect of the acoustic liner and show the attractive potential to apply this device to suppress thermoacoustic instability.