分级旋流燃烧室流动及碳烟排放特性研究

胡阁; 李建中; 张靖周; 金武

doi:10.13224/j.cnki.jasp.20210695

分级旋流燃烧室流动及碳烟排放特性研究

doi: 10.13224/j.cnki.jasp.20210695

南京航空航天大学能源与动力学院，南京 210016

基金项目: 国家科技重大专项（2017-Ⅲ-0002-0026，2019-Ⅲ-0014-0058）

详细信息

作者简介:
胡阁（1993-），男，博士生，主要从事航空发动机燃烧室性能研究

通讯作者:
李建中（1979-），男，教授、博士生导师，博士，主要从事航空发动机燃烧技术研究。E-mail：ljzh0629@nuaa.edu.cn

中图分类号: V231.2
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- 文章访问数: 37
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- 被引次数: 0
出版历程
- 收稿日期: 2021-12-06
- 网络出版日期: 2024-01-16

Flow field and soot emission characteristics of staged swirling combustor

College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
为了探究某分级旋流燃烧室流动及碳烟排放特性，结合试验和数值仿真方法对流动特性进行研究，揭示了主、副模分级旋流燃烧室的流动发展过程。通过大涡模拟（LES）非定常流动计算，结果表明：副模出口附近速度存在着1820 Hz的周期性振荡，而主模出口流动未见明显脉动，同时钝体下游存在进动涡核（PVC）结构；对分级旋流燃烧室碳烟排放的数值研究，结果表明：中心回流区附近是碳烟主要生成区域，在贫油燃烧时，随着油气比增大，碳烟浓度显著增大，碳烟质量浓度随沿程轴向距离增加均呈现先上升后减小趋势，且其峰值对应轴向位置逐渐后移，最终导致燃烧室出口冒烟排放的差异。
- 燃烧室 /
- 分级旋流 /
- 流场 /
- 非定常 /
- 碳烟
Abstract:
In order to investigate the flow field and soot emission characteristics of staged combustor, the flow field characteristics were studied by experimental and numerical simulation methods, and the flow development process was revealed. The results of large eddy simulation (LES) showed that there was a 1820 Hz periodic velocity oscillation at the outlet of the pilot stage, but without obvious flow pulsation at the outlet of the main mode, and there was a precession vortex core (PVC) downstream the swirler. Numerical studies of soot emission characteristics showed that soot was abundant in primary recirculation zone. The soot concentration increased significantly with the increase of ratio of fuel and air in the lean combustion state. Along axial direction, the mass concentration of soot all showed a trend of decrease after rising first, and the peak corresponding to the axial position gradually moved back, ultimately resulting in a difference in soot emission from the combustor exit.
- combustor /
- staged swirl /
- flow field /
- unsteady /
- soot

HTML

图 1 燃烧室结构示意图

Figure 1. Diagram of combustor structure

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图 2 PIV流场试验系统图

Figure 2. Schematic of PIV experiment system

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图 3 YOZ截面流场结构

Figure 3. Flow field on central section YOZ

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图 4 轴向速度频谱

Figure 4. Axial velocity spectrum

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图 5 点P轴向速度时间演变分布

Figure 5. Axial velocity time evolution distribution of point P

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图 6 一个周期内不同时刻的流场分布

Figure 6. Flow field at different times in a period

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图 7 瞬时流场结构特征

Figure 7. Instantaneous flow field structure

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图 8 OTDF及燃油雾化特性

Figure 8. OTDF and fuel atomization characteristics

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图 9 燃烧室YOZ截面温度分布云图

Figure 9. Temperature distribution on section YOZ

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图 10 不同ϕ时碳烟质量浓度沿轴向的分布

Figure 10. Distribution of soot mass concentration along axial direction under different ϕ

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图 11 燃烧室YOZ截面Soot质量分数及流线图

Figure 11. Mass fraction and streamline diagram of Soot on combustion chamber section YOZ

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图 12 燃烧室YOZ截面C₂H₂质量分数分布

Figure 12. Mass fraction of C₂H₂ on combustion chamber section YOZ

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图 13 燃烧室YOZ截面碳烟表面增长速率

Figure 13. Soot growth rate on combustion chamber section YOZ

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图 14 不同ϕ时燃烧室YOZ截面碳烟氧化速率

Figure 14. Soot oxidation rate on section YOZ under different ϕ

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表 1 数值计算工况

Table 1. 1 Numerical simulation conditions

工况进口温度/K 进口压力/Pa 分级比τ 油气比

a 700 911925 0.2 0.034

b 700 911925 0.2 0.04

c 700 911925 0.2 0.046

d 700 911925 0.2 0.052

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参考文献(25)

[1]	LIEUWEN T C,YANG V. Gas turbine emissions[M]. 2nd ed. Cambridge: Cambridge University Press. 2013.
[2]	LEFEBVRE A H,WHITELAW J H. Gas turbine combustion[J]. International Journal of Heat and Fluid Flow,1984,5(4): 228.
[3]	张弛,林宇震,徐华胜,等. 民用航空发动机低排放燃烧室技术发展现状及水平[J]. 航空学报,2014,35(2): 332-350. ZHANG Chi,LIN Yuzhen,XU Huasheng,et al. Development status and level of low emissions combustor technologies for civil aero-engine[J]. Acta Aeronautica et Astronautica Sinica,2014,35(2): 332-350. (in Chinese ZHANG Chi, LIN Yuzhen, XU Huasheng, et al. Development status and level of low emissions combustor technologies for civil aero-engine[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(2): 332-350. (in Chinese)
[4]	FU Yongqiang,CAI Jun,JENG S M,et al. Characteristics of the swirling flow generated by a counter-rotating swirler: AIAA 2007-5690 [R]. Reston,Virigina: AIAA,2007.
[5]	FU Yongqiang,JENG S M,TACINA R. Confinement effects on the swirling flow generated by a helical axial swirler: AIAA 2006-545 [R]. Reston,Virigina: AIAA,2006.
[6]	DEWANJI D,RAO A G,POURQUIE M,et al. Investigation of flow characteristics in lean direct injection combustors[J]. Journal of Propulsion and Power,2012,28(1): 181-196. doi: 10.2514/1.B34264
[7]	DEWANJI D,RAO A G. Spray combustion modeling in lean direct injection combustors: Part I single-element LDI[J]. Combustion Science and Technology,2015,187(4): 537-557. doi: 10.1080/00102202.2014.965810
[8]	PATEL N,MENON S. Simulation of spray-turbulence-flame interactions in a lean direct injection combustor[J]. Combustion and Flame,2008,153(1/2): 228-257.
[9]	PATEL N,KıRTAŞ M,SANKARAN V,et al. Simulation of spray combustion in a lean-direct injection combustor[J]. Proceedings of the Combustion Institute,2007,31(2): 2327-2334. doi: 10.1016/j.proci.2006.07.232
[10]	BROATCH A,CARRERES M,GARCÍA-TÍSCAR J,et al. Spectral analysis and modelling of the spray liquid injection in a lean direct injection (LDI) gas turbine combustor through Eulerian-Lagrangian large eddy simulations[J]. Aerospace Science and Technology,2021,118: 106992. doi: 10.1016/j.ast.2021.106992
[11]	WANG S,YANG V,HSIAO G,et al. Large-eddy simulations of gas-turbine swirl injector flow dynamics[J]. Journal of Fluid Mechanics,2007,583: 99-122. doi: 10.1017/S0022112007006155
[12]	DHANUKA S K,TEMME J E,DRISCOLL J. Unsteady aspects of lean premixed prevaporized gas turbine combustors: flame-flame interactions[J]. Journal of Propulsion & Power,2010,273: 631-641.
[13]	STURGESS G J,ZELINA J,SHOUSE D T,et al. Emissions reduction technologies for military gas turbine engines[J]. Journal of Propulsion and Power,2005,21(2): 193-217. doi: 10.2514/1.6528
[14]	DHANUKA S K,TEMME J E,DRISCOLL J F,et al. Vortex-shedding and mixing layer effects on periodic flashback in a lean premixed prevaporized gas turbine combustor[J]. Proceedings of the Combustion Institute,2009,32(2): 2901-2908. doi: 10.1016/j.proci.2008.06.155
[15]	于涵,索建秦,朱鹏飞,等. 中心分级贫油直喷(LDI)燃烧室流动及污染排放特性研究[J]. 西北工业大学学报,2018,36(5): 816-823. YU Han,SUO Jianqin,ZHU Pengfei,et al. The characteristic of flow field and emissions of a concentric staged lean direct injection(LDI) combustor[J]. Journal of Northwestern Polytechnical University,2018,36(5): 816-823. (in Chinese doi: 10.3969/j.issn.1000-2758.2018.05.002 YU Han, SUO Jianqin, ZHU Pengfei, et al. The characteristic of flow field and emissions of a concentric staged lean direct injection(LDI) combustor[J]. Journal of Northwestern Polytechnical University, 2018, 36(5): 816-823. (in Chinese) doi: 10.3969/j.issn.1000-2758.2018.05.002
[16]	于涵,索建秦,郑龙席. 带收敛出口的单元贫油直喷燃烧室冷态和热态流动特性研究[J]. 推进技术,2019,40(3): 608-618. YU Han,SUO Jianqin,ZHENG Longxi. Investigation of non-reaction and reaction flow characteristic of single element lean direct injection combustor with convergent outlet[J]. Journal of Propulsion Technology,2019,40(3): 608-618. (in Chinese YU Han, SUO Jianqin, ZHENG Longxi. Investigation of non-reaction and reaction flow characteristic of single element lean direct injection combustor with convergent outlet[J]. Journal of Propulsion Technology, 2019, 40(3): 608-618. (in Chinese)
[17]	李乐,索建秦,于涵,等. 中心分级多点直喷燃烧室冷态流动特性研究[J]. 推进技术,2021,42(6): 1339-1350. LI Le,SUO Jianqin,YU Han,et al. Non-reaction flow characteristic of concentric staged multi-point direct injection combustor[J]. Journal of Propulsion Technology,2021,42(6): 1339-1350. (in Chinese LI Le, SUO Jianqin, YU Han, et al. Non-reaction flow characteristic of concentric staged multi-point direct injection combustor[J]. Journal of Propulsion Technology, 2021, 42(6): 1339-1350. (in Chinese)
[18]	CHEN Jian,LI Jianzhong,YUAN Li,et al. Flow and flame characteristics of a RP-3 fuelled high temperature rise combustor based on RQL[J]. Fuel,2019,235: 1159-1171. doi: 10.1016/j.fuel.2018.08.115
[19]	KUNDU K,PENKO P,VANOVERBEKE T. A practical kinetic mechanism for computing combustion in gas turbine engines: AIAA 1999-2218 [R]. Reston,Virigina: AIAA,1999.
[20]	BROOKES S,MOSS J. Predictions of soot and thermal radiation properties in confined turbulent jet diffusion flames[J]. Combustion and Flame,1999,116(4): 486-503. doi: 10.1016/S0010-2180(98)00056-X
[21]	秦皓,丁志磊,李海涛,等. LESS燃烧室非定常旋流流动[J]. 航空动力学报,2015,30(7): 1566-1575. QIN Hao,DING Zhilei,LI Haitao,et al. Unsteady swirling flow in low emissions stirred swirls combustor[J]. Journal of Aerospace Power,2015,30(7): 1566-1575. (in Chinese QIN Hao, DING Zhilei, LI Haitao, et al. Unsteady swirling flow in low emissions stirred swirls combustor[J]. Journal of Aerospace Power, 2015, 30(7): 1566-1575. (in Chinese)
[22]	杨思恒,王建臣,张弛,等. 三头部中心分级燃烧室出口温度分布研究[J]. 工程热物理学报,2021,42(10): 2737-2748. YANG Siheng,WANG Jianchen,ZHANG Chi,et al. Investigation on outlet temperature distribution of a three-sector centrally staged combustor[J]. Journal of Engineering Thermophysics,2021,42(10): 2737-2748. (in Chinese YANG Siheng, WANG Jianchen, ZHANG Chi, et al. Investigation on outlet temperature distribution of a three-sector centrally staged combustor[J]. Journal of Engineering Thermophysics, 2021, 42(10): 2737-2748. (in Chinese)
[23]	BASHIRNEZHAD K,MOGHIMAN M,ZAHMATKESH I. Studies on soot formation and combustion in turbulent spray flames: modeling and experimental measurement[J]. Iranian Journal of Chemistry & Chemical Engineering-International English Edition,2007,26: 45-54.
[24]	PENKO P,KUNDU K,SIOW Y,et al. A kinetic mechanism for calculation of pollutant species in Jet-a combustion: AIAA 2000-3035[R]. Reston, Virigina: AIAA, 2000.
[25]	李宇航,张弛,王建臣,等. 预燃级对TeLESS Ⅱ燃烧室冒烟排放的影响[J]. 航空动力学报,2018,33(10): 2424-2433. LI Yuhang,ZHANG Chi,WANG Jianchen,et al. Effect of pilot strutures on smoke emissions in the TeLESS Ⅱ combustor[J]. Journal of Aerospace Power,2018,33(10): 2424-2433. (in Chinese LI Yuhang, ZHANG Chi, WANG Jianchen, et al. Effect of pilot strutures on smoke emissions in the TeLESS Ⅱ combustor[J]. Journal of Aerospace Power, 2018, 33(10): 2424-2433. (in Chinese)