贫氧条件下钝体火焰动力学数值模拟研究

赵泯玮; 田培森; 黄鑫波; 赵宁波; 郑洪涛; 邓福泉

doi:10.13224/j.cnki.jasp.20230661

贫氧条件下钝体火焰动力学数值模拟研究

doi: 10.13224/j.cnki.jasp.20230661

1.
哈尔滨工程大学动力与能源工程学院，哈尔滨 150001
2.
哈尔滨工程大学机电工程学院，哈尔滨 150001

基金项目: 黑龙江省自然科学基金（LH2020E067）；国家科技重大专项（2019-Ⅲ-0014-0058）；中央高校基本业务费（3072022TS0309）

详细信息

作者简介:
赵泯玮（2000-），男，硕士生，主要从事航空发动机燃烧室研究。E-mail：zhaominwei@hrbeu.edu.cn

通讯作者:
邓福泉（1988-），男，讲师、硕士生导师，博士，主要从事航空发动机燃烧室研究。E-mail：adsdengfuquan@hrbeu.edu.cn

中图分类号: V231.2
计量
- 文章访问数: 366
- HTML浏览量: 230
- PDF量: 28
- 被引次数: 0
出版历程
- 收稿日期: 2023-10-16
- 网络出版日期: 2025-07-01

Numerical simulation study on the dynamics of bluff-body flames under oxygen-lean conditions

1.
College of Power and Energy Engineering，Harbin Engineering University，Harbin 150001，China
2.
College of Mechanical and Electrical Engineering，Harbin Engineering University，Harbin 150001，China

摘要

摘要:
为探究含氧量对加力燃烧室动态燃烧特性的影响，采用大涡模拟方法研究了不同压力（0.1～0.3 MPa）下含氧量（14%～23%）对加力燃烧室流场结构、火焰形态、释热脉动以及压力脉动的影响。研究表明：不同压力下含氧量对钝体火焰稳定器后的火焰和流场均具有显著影响；随着压力和含氧量的变化，在剪切层中观察到BVK和KH两种不同的不稳定特征，燃烧室下游的流动主要由BVK不稳定主导；随着含氧量降低，火焰摆动幅度增大，燃烧室中的OH基浓度降低，火焰温度减小；此外，含氧量和压力的变化还影响KH不稳定向BVK不稳定转变的位置；在BVK不稳定主导下，压力脉动和放热脉动的主频一致，在KH不稳定主导下，放热脉动没有明显的主频。
- 加力燃烧室 /
- 钝体火焰稳定器 /
- 动态燃烧特性 /
- 大涡模拟 /
- 燃烧不稳定
Abstract:
To investigate the effect of oxygen content on the dynamic combustion characteristics of an afterburner, a large eddy simulation method was used to study the effects of oxygen content (14%—23%) at different pressures (0.1—0.3 MPa) on the flow field structure, flame morphology, exothermic pulsation, and pressure pulsation of the afterburner. Research showed that the oxygen content at different pressures had a significant impact on the flame and flow field behind the bluff body flame holder; as the pressure and oxygen content changed, two different instability characteristics, BVK and KH, were observed in the shear layer. The flow downstream of the combustor was mainly dominated by BVK instability; as the oxygen content decreased, the flame oscillation amplitude increased, the concentration of OH groups in the combustor decreased, and the flame temperature decreased; in addition, changes in oxygen content and pressure also affected the location of KH instability transitioning to BVK instability; under the dominance of BVK instability, the dominant frequency of pressure pulsation and exothermic pulsation was consistent, while under the dominance of KH instability, exothermic pulsation had no obvious dominant frequency.
- afterburner /
- bluff body flame holder /
- dynamic combustion characteristics /
- large eddy simulation /
- combustion instability

HTML

图 1 加力模型燃烧室结构示意图（单位：mm）

Figure 1. Schematic diagram of afterburner model structure （unit：mm）

下载: 全尺寸图片幻灯片

图 2 网格示意图

Figure 2. Schematic diagram of grid used

下载: 全尺寸图片幻灯片

图 3 非定常数值模拟网格无关性验证

Figure 3. Verification of mesh independence in unsteady numerical simulation

下载: 全尺寸图片幻灯片

图 4 数值模拟与实验结果对比

Figure 4. Comparison between numerical simulation and experimental results

下载: 全尺寸图片幻灯片

图 5 不同工作压力下含氧量对涡结构的影响

Figure 5. Effect of oxygen content on vortex structure under various pressures

下载: 全尺寸图片幻灯片

图 6 不同压力下含氧量对OH基浓度分布的影响

Figure 6. Effect of oxygen content on OH concentration field under various pressures

下载: 全尺寸图片幻灯片

图 7 不同压力下含氧量对温度分布的影响

Figure 7. Effect of oxygen content on temperature field under various pressures

下载: 全尺寸图片幻灯片

图 8 不同工作压力下放热脉动随含氧量的变化

Figure 8. Variations in exothermic pulsation with oxygen content under different working pressures

下载: 全尺寸图片幻灯片

图 9 不同工作压力下压力脉动随含氧量的变化

Figure 9. Variation in pressure pulsation with oxygen content under different working pressures

下载: 全尺寸图片幻灯片

表 1 数值计算工况

Table 1. Numerical calculation conditions

工况编号压力/MPa 温度/K 马赫数/Ma 油气比含氧量/%

1 0.1 1000 0.2 0.03 14～23

2 0.2 1000 0.2 0.03 14～23

3 0.3 1000 0.2 0.03 14～23

下载: 导出CSV

参考文献(19)

[1]	王波, 惠鑫, 李锋, 等. 航空发动机主燃烧室动态燃烧研究现状及关键技术分析[J]. 航空动力学报, 2022, 37(11): 2479-2487. WANG Bo, HUI Xin, LI Feng, et al. Research status and key technology analysis of dynamic combustion in aero-engine main combustor[J]. Journal of Aerospace Power, 2022, 37(11): 2479-2487. (in Chinese WANG Bo, HUI Xin, LI Feng, et al. Research status and key technology analysis of dynamic combustion in aero-engine main combustor[J]. Journal of Aerospace Power, 2022, 37(11): 2479-2487. (in Chinese)
[2]	李锋, 郭瑞卿, 尚守堂, 等. 高温升三旋流燃烧室与双旋流燃烧室的性能对比[J]. 航空动力学报, 2015, 30(1): 10-15. LI Feng, GUO Ruiqing, SHANG Shoutang, et al. Performance comparison between high temperature rise triple-swirler combustor and double-swirler combustor[J]. Journal of Aerospace Power, 2015, 30(1): 10-15. (in Chinese LI Feng, GUO Ruiqing, SHANG Shoutang, et al. Performance comparison between high temperature rise triple-swirler combustor and double-swirler combustor[J]. Journal of Aerospace Power, 2015, 30(1): 10-15. (in Chinese)
[3]	毕亚宁, 范育新, 肖锋, 等. 部分旋流对加力燃烧室流动和燃烧性能的影响[J]. 推进技术, 2024, 45(2): 2210062. BI Yaning, FAN Yuxin, XIAO Feng, et al. Effects of partial swirl on flow and combustion performance of afterburner[J]. Journal of Propulsion Technology, 2024, 45(2): 2210062. (in Chinese BI Yaning, FAN Yuxin, XIAO Feng, et al. Effects of partial swirl on flow and combustion performance of afterburner[J]. Journal of Propulsion Technology, 2024, 45(2): 2210062. (in Chinese)
[4]	李亚娟, 王明瑞, 张宝华, 等. 油气比对燃气分析法燃烧效率、气态污染物测试精度的影响[J]. 航空动力学报, 2018, 33(3): 557-564. LI Yajuan, WANG Mingrui, ZHANG Baohua, et al. Influence of air-fuel ratio on accuracy of combustion efficiency and exhaust emission under gas analysis method[J]. Journal of Aerospace Power, 2018, 33(3): 557-564. (in Chinese LI Yajuan, WANG Mingrui, ZHANG Baohua, et al. Influence of air-fuel ratio on accuracy of combustion efficiency and exhaust emission under gas analysis method[J]. Journal of Aerospace Power, 2018, 33(3): 557-564. (in Chinese)
[5]	BONCIOLINI G, EBI D, DOLL U, et al. Effect of wall thermal inertia upon transient thermoacoustic dynamics of a swirl-stabilized flame[J]. Proceedings of the Combustion Institute, 2019, 37(4): 5351-5358. doi: 10.1016/j.proci.2018.06.229
[6]	仝照旭, 韩启祥. 钝体火焰稳定器后燃烧不稳定数值模拟[J]. 航空发动机, 2023, 49(1): 81-88. TONG Zhaoxu, HAN Qixiang. Numerical simulation of combustion instability behind bluff body flame holder[J]. Aeroengine, 2023, 49(1): 81-88. (in Chinese TONG Zhaoxu, HAN Qixiang. Numerical simulation of combustion instability behind bluff body flame holder[J]. Aeroengine, 2023, 49(1): 81-88. (in Chinese)
[7]	文清兰, 张琪, 舒庆. 进口气流角对加力燃烧室流场的影响分析[J]. 航空科学技术, 2021, 32(7): 32-38. WEN Qinglan, ZHANG Qi, SHU Qing. Influence analysis of inlet flow angle on the flow field of afterburner[J]. Aeronautical Science & Technology, 2021, 32(7): 32-38. (in Chinese WEN Qinglan, ZHANG Qi, SHU Qing. Influence analysis of inlet flow angle on the flow field of afterburner[J]. Aeronautical Science & Technology, 2021, 32(7): 32-38. (in Chinese)
[8]	ROY R N, SREEDHARA S. A numerical study on the influence of airstream dilution and jet velocity on NO emission characteristics of CH4 and DME bluff-body flames[J]. Fuel, 2015, 142: 73-80. doi: 10.1016/j.fuel.2014.10.061
[9]	NOOR M M, WANDEL A P, YUSAF T. Numerical study of oxygen dilution and temperature distribution of biogas combustion in bluff-body MILD burner[C]//7th Australian Combustion Symposium (ACS 2013). Perth, Australian: University of Western Australia, 2013, 299-303.
[10]	LIU C Y, ZHANG J, YANG T, et al. Bluff-body flames in hot and diluted environments[C]//ASME 2018 Power Conference Collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. Florida, US: 2018, 51395: V001T01A002.
[11]	KUMAR P, MISHRA D P. Characterization of bluff-body stabilized LPG jet diffusion flame with N2 dilution[J]. Energy Conversion and Management, 2008, 49(10): 2698-2703. doi: 10.1016/j.enconman.2008.04.007
[12]	MISHRA D P, KUMAR P. Effects of N2 gas on preheated laminar LPG jet diffusion flame[J]. Energy Conversion and Management, 2010, 51(11): 2144-2149. doi: 10.1016/j.enconman.2010.03.007
[13]	李钰航, 李文龙, 吴宝元. 钝体稳定火焰尾流特性的数值模拟研究[J]. 固体火箭技术, 2021, 44(6): 793-799. LI Yuhang, LI Wenlong, WU Baoyuan. Numerical study on the wake characteristic of a bluff-body stabilized flame[J]. Journal of Solid Rocket Technology, 2021, 44(6): 793-799. (in Chinese doi: 10.7673/j.issn.1006-2793.2021.06.011 LI Yuhang, LI Wenlong, WU Baoyuan. Numerical study on the wake characteristic of a bluff-body stabilized flame[J]. Journal of Solid Rocket Technology, 2021, 44(6): 793-799. (in Chinese) doi: 10.7673/j.issn.1006-2793.2021.06.011
[14]	FORTIN M K, MORALES A J, SALAUDDIN S, et al. Numerical investigation of sub-atmospheric pressure effects on lean bluff body blowout: AIAA 2023-1112[R]. Reston, US: AIAA SCITECH 2023 Forum, 2023.
[15]	SKIBA A W, GUIBERTI T F, BOYETTE W R, et al. On the bi-stable nature of turbulent premixed bluff-body stabilized flames at elevated pressure and near lean blow-off[J]. Proceedings of the Combustion Institute, 2021, 38(2): 2853-2860. doi: 10.1016/j.proci.2020.06.060
[16]	刘潇. 低排放燃烧室设计及预混燃烧特性研究[D]. 哈尔滨: 哈尔滨工程大学, 2017. LIU Xiao. Study on low emission combustion chamber design and premixed combustion characteristics[D]. Harbin: Harbin Engineering University, 2017. (in Chinese LIU Xiao. Study on low emission combustion chamber design and premixed combustion characteristics[D]. Harbin: Harbin Engineering University, 2017. (in Chinese)
[17]	LUCKACHAN K G, RAJA S K, SRIKRISHNAN A R, et al. The influence of the geometry of V-gutter bluff body on transient vortex shedding[J]. International Journal of Turbo & Jet-Engines, 2023, 40(4): 463-471.
[18]	WANG Bingchen, BERGSTROM D J. A dynamic nonlinear subgrid-scale stress model[J]. Physics of Fluids, 2005, 17(3): 035109. doi: 10.1063/1.1858511
[19]	KUNDU K, PENKO P, VANOVERBEKE T. A practical kinetic mechanism for computing combustion in gas turbine engines[C]//35th joint propulsion conference and exhibit. Los Angeles, US: AIAA, 1999: 2218.