Experimental study of premixed methane-air flame coupled with an external acoustic field

被引：5
|
作者：
Arefyev, K. Yu [1 ]
Krikunova, A. I. [1 ]
Panov, V. A. [1 ]
机构：
[1] Moscow Inst Phys & Technol, Inst Skiy Pereulok 9, Dolgoprudnyi 141700, Moscow Region, Russia
来源：
XXXIII INTERNATIONAL CONFERENCE ON EQUATIONS OF STATE FOR MATTER | 2019年 / 1147卷
基金：
俄罗斯科学基金会;
关键词：
DYNAMICS;
D O I：
10.1088/1742-6596/1147/1/012050
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
An external acoustic effect on conical methane-air premix flame is experimentally studied at frequencies from 10 to 450 Hz. Conditions of flame blow-off in a wide range of mixture equivalence ratio have been determined. The visualization of the perturbed flame has been performed. The dependences of blow-off velocity limit are shown upon amplitude of the acoustic-induced velocity fluctuations and excitation frequency. Flow velocity fluctuations in the outlet section of the nozzle have been measured for investigated range of acoustic excitation frequencies. Also, the coupling between the blow-off conditions and flow velocity fluctuations has been established. The obtained results could be useful while analyzing stable operation conditions for the high-speed combustion chambers of the advanced propulsion plants.
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页数：7
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