FIA method for LBO limit predictions of aero-engine combustors based on FV model

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	FIA method for LBO limit predictions of aero-engine combustors based on FV model
	Hu, Bin 1; Huang, Yong 2; Wang, Fang 2
刊名	AEROSPACE SCIENCE AND TECHNOLOGY
	2013-07-01
卷号	28 期号:1 页码:435-446
关键词	Aero-engine combustor Lean blow out Fuel iterative approximation Flame volume Numerical simulation
英文摘要	Lean Blow-Out (LBO) is critical to operational performance of combustion systems in propulsion and power generation. Current predictive tools for LBO are based on decades old empirical correlations that have limited applicability for modern combustor design. According to the Lefebvre's model for LBO and flame volume concept, an FV (Flame Volume) model was proposed by authors in the early experimental study. The FV model adds two key parameters of a and beta that represent the fraction of dome air and the dimensionless flame volume defined as the ratio of flame volume (V-f) and combustor volume (V-c). Due to the flame volume (V-f) is obtained from the experimental image, FV model could only be used in LBO analysis instead of predictions. In the present study, a method named Fuel Iterative Approximation (FIA) is proposed based on FV model for LBO limit predictions. In FIA, alpha and beta contained in FV model are estimated from the numerical simulation results of combustors, and an iterative relationship between fuel flow rate and flame volume is established to make the prediction of LBO fuel/air ratio (q(LBO)). Comparing with the experimental LBO data for 17 combustors, the q(LBO) obtained by FIA show much better agreement than that obtained by Lefebvre's model. The maximum prediction uncertainties of FIA and Lefebvre's model are +/- 20% and +/- 50%, respectively. The time cost of the LBO prediction using FIA for each case is about 6 hours with computer equipment of CPU x 4 and 4 GB memory, showing that the FIA is reliable and efficient, and could be used for the performance evaluation of combustors, even the so-called "paper combustors" in the primary design stage. (C) 2013 Elsevier Masson SAS. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Aerospace
研究领域[WOS]	Engineering
关键词[WOS]	LEAN BLOW-OUT
收录类别	SCI
语种	英语
WOS记录号	WOS:000321162600040
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98797]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Chinese Acad Sci, Inst Engn Thermophys, Key Lab Light Duty Gas Turbine, Beijing 100190, Peoples R China 2.Beijing Univ Aeronaut & Astronaut, Sch Jet Prop, Natl Key Lab Sci & Technol Aeroengines, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Hu, Bin,Huang, Yong,Wang, Fang. FIA method for LBO limit predictions of aero-engine combustors based on FV model[J]. AEROSPACE SCIENCE AND TECHNOLOGY,2013,28(1):435-446.
APA	Hu, Bin,Huang, Yong,&Wang, Fang.(2013).FIA method for LBO limit predictions of aero-engine combustors based on FV model.AEROSPACE SCIENCE AND TECHNOLOGY,28(1),435-446.
MLA	Hu, Bin,et al."FIA method for LBO limit predictions of aero-engine combustors based on FV model".AEROSPACE SCIENCE AND TECHNOLOGY 28.1(2013):435-446.