A Numerical Investigation of the Combustion Instability in a Ducted Non-Premixed Flame

2006 ◽  
Author(s):  
Sriram Doraiswamy ◽  
Manav Tyagi ◽  
Dhanya Parameshwaran ◽  
Satyanarayanan Chakravarthy
Keyword(s):  
Numerical Investigation ◽  
Combustion Instability ◽  
Premixed Flame

scholarly journals Combustion Instability of Swirl Premixed Flame with Dielectric Barrier Discharge Plasma

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1405
Author(s):  
Kai Deng ◽  
Shenglang Zhao ◽  
Chenyang Xue ◽  
Jinlin Hu ◽  
Yi Zhong ◽  
...  
Keyword(s):  
Transfer Function ◽  
Heat Release ◽  
Heat Release Rate ◽  
Release Rate ◽  
Combustion Instability ◽  
Premixed Flame ◽  
Oh Radicals ◽  
Acoustic Frequency ◽  
Planar Laser ◽  
Barrier Discharge Plasma

The effects of plasma on the combustion instability of a methane swirling premixed flame under acoustic excitation were investigated. The flame image of OH planar laser-induced fluorescence and the fluctuation of flame transfer function showed the mechanism of plasma in combustion instability. The results show that when the acoustic frequency is less than 100 Hz, the gain in flame transfer function gradually increases with the frequency; when the acoustic frequency is 100~220 Hz, the flame transfer function shows a trend of first decreasing and then increasing with acoustic frequency. When the acoustic frequency is greater than 220 Hz, the flame transfer function gradually decreases with acoustic frequency. When the voltage exceeds the critical discharge value of 5.3 kV, the premixed gas is ionized and the heat release rate increases significantly, thereby reducing the gain in flame transfer function and enhancing flame stability. Plasma causes changes in the internal recirculation zone, compression, and curling degree of the flame, and thereby accelerates the rate of chemical reaction and leads to an increase in flame heat release rate. Eventually, the concentration of OH radicals changes, and the heat release rate changes accordingly, which ultimately changes the combustion instability of the swirling flame.

scholarly journals A Numerical Investigation on Characteristics of Turbulent Premixed Flame in Porous Media

2015 ◽  
Vol 66 ◽  
pp. 265-268
Author(s):  
Zhong-Shan Chen ◽  
Mao-Zhao Xie ◽  
Hong-Sheng Liu ◽  
Meng Yue
Keyword(s):  
Porous Media ◽  
Numerical Investigation ◽  
Premixed Flame ◽  
Turbulent Premixed Flame ◽  
Turbulent Premixed

Experimental and numerical investigation of premixed flame propagation with distorted tulip shape in a closed duct

2012 ◽  
Vol 159 (4) ◽  
pp. 1523-1538 ◽  
Author(s):  
Huahua Xiao ◽  
Dmitriy Makarov ◽  
Jinhua Sun ◽  
Vladimir Molkov
Keyword(s):  
Numerical Investigation ◽  
Flame Propagation ◽  
Premixed Flame

A numerical investigation of the flame structure of an unsteady inverse partially premixed flame

1997 ◽  
Vol 111 (4) ◽  
pp. 296-311 ◽  
Author(s):  
Zhuang Shu ◽  
Suresh K. Aggarwal ◽  
Viswanath R. Katta ◽  
Ishwar K. Puri
Keyword(s):  
Numerical Investigation ◽  
Flame Structure ◽  
Premixed Flame ◽  
Partially Premixed ◽  
Partially Premixed Flame
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