干旱区生态环境知识资源中心(Arid): Effect of N-2 dilution and preheat temperature on combustion dynamics of syngas in a reverse-flow combustor

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DOI	10.1016/j.expthermflusci.2019.109926
	Effect of N-2 dilution and preheat temperature on combustion dynamics of syngas in a reverse-flow combustor
	Pramanik, Santanu; Ravikrishna, R., V
通讯作者	Ravikrishna, R., V
来源期刊	EXPERIMENTAL THERMAL AND FLUID SCIENCE
ISSN	0894-1777
EISSN	1879-2286
出版年	2020
卷号	110
英文摘要	The present study investigates the combustion dynamics of low-calorific value syngas in the reverse-flow configuration at P = 1 atm using OH* chemiluminescence (5 kHz), noise (50 kHz), and emissions (NOx and CO) measurements. The combustion dynamics have been investigated as a function of the global equivalence ratio (0.32-0.89), percentage O-2 in the coflow (7.6-21%), and the oxidizer preheat temperature (similar to 400-800 K). The variation of these parameters resulted in different operating conditions such as conventional, ultra-lean, transition, and MILD combustion modes. For all the cases, autoignition kernels were observed arid appear to be a possible mode of flame stabilization - highlighting the role of H-2 in reducing the ignition delay. The combustion chamber demonstrated stable operation over the range of equivalence ratio and percentage O-2 investigated, with the conventional mode displaying the highest SPL and fluctuations in the reaction zone (OH*). The most stable operation was obtained for the MILD case where the SPL decreased by similar to 6 dB caused by a suppression of the high-frequency (> 800 Hz) longitudinal modes. However, the operation of the combustion chamber became unstable as the oxidizer preheat temperature decreased from 603-547 K due to the emergence of very high-frequency (similar to 9-15 kHz) oscillations.
英文关键词	Reverse-flow Combustion dynamics OH* chemiluminescence Noise Syngas
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000496873700003
WOS关键词	MILD COMBUSTION ; DISTRIBUTED COMBUSTION ; OPTICAL DIAGNOSTICS ; NOX EMISSIONS ; SWIRL ; PERFORMANCE ; MODERATE ; VORTEX ; FLAME
WOS类目	Thermodynamics ; Engineering, Mechanical ; Physics, Fluids & Plasmas
WOS研究方向	Thermodynamics ; Engineering ; Physics
EI主题词	2020-01-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312224
作者单位	Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India
推荐引用方式 GB/T 7714	Pramanik, Santanu,Ravikrishna, R., V. Effect of N-2 dilution and preheat temperature on combustion dynamics of syngas in a reverse-flow combustor[J],2020,110.
APA	Pramanik, Santanu,&Ravikrishna, R., V.(2020).Effect of N-2 dilution and preheat temperature on combustion dynamics of syngas in a reverse-flow combustor.EXPERIMENTAL THERMAL AND FLUID SCIENCE,110.
MLA	Pramanik, Santanu,et al."Effect of N-2 dilution and preheat temperature on combustion dynamics of syngas in a reverse-flow combustor".EXPERIMENTAL THERMAL AND FLUID SCIENCE 110(2020).