Influence of flame-holder temperature on the acoustic flame transfer functions of a laminar flame

被引：46
作者：
Mejia, Daniel [1 ]
Miguel-Brebion, Maxence [1 ]
Ghani, Abdulla [1 ]
Kaiser, Thomas [1 ]
Duchaine, Florent [2 ]
Selle, Laurent [1 ]
Poinsot, Thierry [1 ,2 ]
机构：
[1] Univ Toulouse, CNRS, INPT, IMFT,UPS, Toulouse, France
[2] CERFACS, CFD team, 42 Ave G Coriolis, Toulouse, France
来源：
COMBUSTION AND FLAME | 2018年 / 188卷
基金：
欧洲研究理事会;
关键词：
DNS; Conjugate heat transfer; Analytically reduced chemistry; Flame transfer function; Premixed flame; Laminar flame; PREMIXED FLAME; WALL-TEMPERATURE; HEAT-TRANSFER; DYNAMICS; FLOW; IDENTIFICATION; IMPACT; MODEL; SIMULATION; MECHANISM;
D O I：
10.1016/j.combustflame.2017.09.016
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The occurrence of combustion instabilities in high-performance engines such as gas turbines is often affected by the thermal state of the engine. For example, strong bursts of pressure fluctuations may occur at cold start for operating conditions that are stable once the engine reaches thermal equilibrium. This observation raises the question of the influence of material temperature on the response of flames to acoustic perturbations. In this study, we assess the influence of the temperature of the flame holder for a laminar flame. Both experiments and numerical simulations show that the Flame Transfer Function (FTF) is strongly affected by the flame-holder temperature. The key factors driving the evolution of the FTF are the flame-root location as well as the modification of the flow, which affects its stability. In the case of the cooled flame-holder, the formation of a recirculation zone is identified as the main impact on the FTF. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码：5 / 12
页数：8
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