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Title: Predicting Lean Blowout Limit of Combustors Based on Semi-Empirical Correlation and Simulation
Author: null(胡斌)1; Zhao, Qingjun1; Xu, Jianzhong2
Source: JOURNAL OF PROPULSION AND POWER
Issued Date: 2016
Volume: 32, Issue:1, Pages:108-120
DOI: 10.2514/1.B35583
DOC Type: Article
English Abstract: A method named characteristic curve of flame volume is achieved for lean blowout predictions on the basis of the improved Lefebvre's model and simulated reacting flows. Three main issues are presented: 1) Based on the results from combustion visualization experiments, Lefebvre's model is improved regarding its universality for combustor configurations. The flame volume near lean blowout V-flame,V-LBO obtained from simulated reacting flow is introduced into the model. 2) Characteristic curve of flame volume is a functional curve of flame volume V-flame and fuel/air ratio q in a certain combustor and is presented as an "S" pattern, with q ranging from stable operation to nearly engine-off conditions. The region where the fuel/air ratio ranges from 3 to 10 in characteristic curve of flame volume is the unstable combustion region, and nearly all of the lean blowout points fall in this region. 3) According to the relationship between characteristic curve of flame volume expressed as q = f(V-flame) and the improved Lefebvre's model expressed as q(LBO) = f(m)(V-flame,V-LBO), a method named characteristic curve of flame volume is proposed for lean blowout predictions. By the comparison with experimental data on 26 combustors, the lean blowout fuel/air ratios obtained by the characteristic curve of flame volume method fit well with that obtained by experiments, having maximum and average errors of +/- 24.2 and +/- 7.0% between predictions and measurements.
WOS Headings: Science & Technology ; Technology
WOS Subject: Engineering, Aerospace
WOS Subject Extended: Engineering
WOS Keyword Plus: WEAK EXTINCTION LIMITS ; TURBINE COMBUSTORS ; MIXTURES
Indexed Type: SCI
Funder: National Natural Science Foundation of China(51306181) ; National Key Technology Research and Development Program(2012BAA11B01)
Language: 英语
WOS ID: WOS:000370984800010
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112363
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Engn Thermophys, Key Lab Light Duty Gas Turbine, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
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