西安交通大学能源与动力工程学院,西安,710049
网络首发:2016-05-10,
纸质出版:2016
移动端阅览
陈立, 李祥晟, 杨诏, 等. 气流入口条件对低旋流燃烧火焰稳定性的影响[J]. 西安交通大学学报, 2016,50(5):114-119.
Effects of Inlet Conditions on Low Swirl Combustion Flame Stability[J]. 2016, 50(5): 114-119.
陈立, 李祥晟, 杨诏, 等. 气流入口条件对低旋流燃烧火焰稳定性的影响[J]. 西安交通大学学报, 2016,50(5):114-119. DOI: 10.7652/xjtuxb201605017.
Effects of Inlet Conditions on Low Swirl Combustion Flame Stability[J]. 2016, 50(5): 114-119. DOI: 10.7652/xjtuxb201605017.
为了研究低旋流燃烧器在喷嘴出口气流平均速度为10.12~19.12 m/s、入口温度为300~500 K、入口压力为101.325~8×101.325 kPa条件下的火焰稳定性
对当量比为0.7的甲烷空气预混气体进行了数值模拟
分析了低旋流燃烧器的流场结构及火焰特性
揭示了燃烧稳定的根本原因。结果表明:低旋流燃烧器流场结构受气流入口条件的影响较小
且能够保持自相似特性; 轴向和径向速度延伸率以及虚拟原点的位置基本不受气流入口条件的影响; 低旋流燃烧器流场随喷嘴出口气流平均速度、入口压力的增加
回火的可能性减小
随入口温度的提高
回火的可能性增大。综合而言
低旋流燃烧器能够在较宽气流入口条件下保持火焰锋面稳定
有利于燃烧器的稳定工作。
A numerical simulation of premixed methane-air gas at equivalence ratio 0.7 was conducted to investigate the flame stability of the low swirl combustion under the conditions of different bulk velocity from 10.12 m/s to 40.00 m/s
inlet temperature from 300 K to 500 K and inlet pressure from 101.325 kPa to 8×101.325 kPa. Mechanism of the combustion stability was revealed by analysis of flow field structure and flame characteristics of the low swirl injector. The results show that the bulk velocity
inlet temperature and inlet pressure exert small influences on the flow field structure
so the self-similar characteristics of the low swirl combustion remain. The mean axial aerodynamic stretch rate
the mean radial aerodynamic stretch rate and the virtual origin are almost not affected by the inlet conditions
which facilitates protecting the stability of flame front. The possibility of backfiring reduces with the increasing bulk velocity or the inlet pressure
while the possibility of backfiring increases with the increasing inlet temperature. The flame front of low swirl combustion retains its stability under wider inlet conditions.
CHENG R K, FABLE S A, SCHMIDT D, et al. Development of a low swirl injector concept for gas turbines [C]∥Proceedings of 2001 International Joint Power Conference. New York, USA: ASME, 2001: 95-101.
CHAN C K, LAU K S, CHIN W K, et al. Freely propagating open premixed turbulent flames stabilized by swirl [C]∥ International Symposium on Combustion. Amsterdam, Netherlands: Elsevier Inc., 1992: 511-518.
JOHNSON M R, LITTLEJOHN D, NAZEER W A, et al. A comparison of the flowfields and emissions of high-swirl injectors and low-swirl injectors for lean premixed gas turbines [J]. Proceedings of the Combustion Institute, 2005, 30(2): 2867-2874
CHENG R K, LITTLEJOHN D, NAZEER W A, et al. Laboratory studies of the flow field characteristics of low-swirl injectors for adaptation to fuel-flexible turbines [J]. Journal of Engineering for Gas Turbines Power, 2006, 130(2): 277-285.
LITTLEJOHN D, CHENG R K. Fuel effects on a low-swirl injector for lean premixed gas turbines [J]. Proceedings of the Combustion Institute, 2007, 31(6): 3155-3162.
CHENG R K, LITTLEJOHN D. Effects of combustor geometry on the flowfields and flame properties of a low-swirl injector [C]∥ASME Turbo Expo 2008: Power for Land, Sea, and Air. New York, USA: ASME, 2008: 393-407.
NEUMAYER M. RANS simulation of methane combustion in a low swirl burner [D]. München, Germany: Technische Universitaet München, 2013.
尹航, 钟仕立, 戴韧, 等. 合成气低旋流燃烧器设计与流动结构的分析 [J]. 动力工程学报, 2011, 31(2): 131-136.
YIN Hang, ZHONG Shili, DAI Ren, et al. Design of low swirl syngas burner and analysis on the flow pattern [J]. Journal of Chinese Society of Power Engineering, 2011, 31(2): 131-136.
柳伟杰, 葛冰, 田寅申, 等. 当量比对甲烷预混低旋流燃烧的影响 [J]. 燃烧科学与技术, 2014(1): 65-69.
LIU Weijie, GE Bing, TIAN Yinshen, et al. Equivalence ratio effects on low swirl combustion for premixed methane-air gas [J]. Combustion Science and Technology, 2014(1): 65-69.
KAZAKOV A, FRENKLACH M. Reduced reaction sets based on GRI-Mech 1.2 [DB/OL]. [2015-03-16]. http: ∥combustion.berkeley.edu/drm/ 1994.
LIU W, GE B, TIAN Y, et al. Experimental and numerical investigations of low-swirl multi-nozzle combustion in a lean premixed combustor [C]∥ASME Turbo Expo 2014. New York, USA: ASME, 2014: V04AT04A045.
DAY M, TACHIBANA S, BELL J, et al. A combined computational and experimental characterization of lean premixed turbulent low swirl laboratory flames: Ⅰ Methane flames [J]. Combustion and Flame, 2012, 159(1): 275-290.
胡鹏,王伟,邓康耀,等.排气再循环与燃烧边界条件耦合对增压汽油机有效热效率的影响.2016,50(1):34-40.[doi:10.7652/xjtuxb201601006]
粘权鑫,郭少龙,方文振,等.液化天然气浸没燃烧式气化器数值模拟方法研究.2016,50(1):67-71.[doi:10.7652/xjtuxb201601011]
崔雨辰,侯俊才,吴筱敏,等.负直流及低频交流电场对预混火焰影响的实验研究.2016,50(1):131-138.[doi:10.7652/xjtuxb201601020]
张聪,侯俊才,段浩,等.交流电场电压幅值对球形火焰影响的理论研究.2015,49(11):33-38.[doi:10.7652/xjtuxb 201511006]
杨诏,李祥晟.高压环境下高炉煤气化学反应机理敏感性分析及机理简化.2015,49(11):39-43.[doi:10.7652/xjtuxb 201511007]
高忠权,李春艳,蔺子雨,等.采用离子电流法的甲醇发动机失火诊断.2015,49(11):44-48.[doi:10.7652/xjtuxb201511 008]
杨振中,秦朝举,宋立业,等.传统缸内壁面传热模型在氢内燃机中的适用性.2015,49(9):36-40.[doi:10.7652/xjtuxb 201509007]
汤成龙,司占博,张旭辉,等.稀释气对高甲烷含量天然气燃烧特性的影响.2015,49(9):41-46.[doi:10.7652/xjtuxb 201509008]
李春艳,高忠权,刘兵,等.电极位置与电极面积对离子电流影响的试验研究.2015,49(7):55-60.[doi:10.7652/xjtuxb 201507010]
李皓宇,刘敬樟.糠醛渣流化床燃烧过程中床料粘结机理研究.2015,49(6):145-150.[doi:10.7652/xjtuxb201506023]
高忠权,李春艳,刘兵,等.采用离子电流法的发动机非正常燃烧诊断.2015,49(5):1-6.[doi:10.7652/xjtuxb201505001]
崔雨辰,段浩,李超,等.电场分布对球形传播火焰变形率的影响.2015,49(5):49-55.[doi:10.7652/xjtuxb201505008]
0
浏览量
4
下载量
7
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621