Extraction of Propagation Structure on Stratified Swirl Flame Dynamics under Velocity Fluctuation

doi:10.13675/j.cnki.tjjs.200343

Journal of Propulsion Technology ›› 2021, Vol. 42 ›› Issue (1): 173-184.DOI: 10.13675/j.cnki.tjjs.200343

• Combustion, Heat and Mass Transfer • Previous Articles Next Articles

Extraction of Propagation Structure on Stratified Swirl Flame Dynamics under Velocity Fluctuation

National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics， School of Energy and Power Engineering，Beihang University，Beijing 100191，China

Online:2021-01-15 Published:2021-01-15

速度脉动下分层旋流火焰动态传播结构提取

张弛，陶超，韩啸，周宇晨，林宇震

北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100191

作者简介:张　弛，博士，副教授，研究领域为航空替代燃料、低污染燃烧和燃烧稳定性控制。E-mail：zhangchi@buaa.edu.cn
基金资助:
国家科技重大专项（2017-III-0004-0028）；国家自然科学基金（91641109）。

Abstract

Abstract: In order to deeply understand the dynamic structures of stratified swirl flame，the mode analysis and parametric study on stratified swirl flame dynamics are carried out. The experiment was carried out on BASIS（Beihang Axial Swirler Independently Stratified burner）， fueled with premixed methane， and using the high-speed camera to capture the flame dynamics of CH* chemiluminescence signal under velocity fluctuation. The characteristics of flame dynamics are analyzed by using traditional proper orthogonal decomposition （POD） and re-oriented POD. The periodic propagation structure along the axial and radial direction is obtained by re-oriented POD. The results show that the frequency of propagation structure is consistent with that of velocity fluctuation， and the propagation structure of axial mode is the most obvious. Then， the effects of the overall equivalence ratio on the re-oriented POD mode are studied. When the overall equivalence ratio increaes， the topological structure of re-oriented POD mode changes. And the dislocation phenomenon appears in the re-oriented POD mode， which is consistent with the flame propagation behavior in the phase average images. This paper shows that the re-oriented POD method can effectively extract the propagation structure in the swirl flame dynamics， which provides an analysis tool for the mechanism study of combustion instability of swirl flame.

Key words: Aero-engine combustor;Stratified swirl flame;Re-oriented POD;Propagation structure;Combustion instability

摘要： 为了深刻理解分层旋流火焰的动态结构，开展了分层旋流火焰动态的模态分析和参数化研究。实验在BASIS （北京航空航天大学发展的具有台阶隔离段的独立分层旋流燃烧器）上开展，以甲烷为燃料预混燃烧，使用高速摄像捕捉了速度脉动下的CH*化学发光信号动态图像。利用传统的本征正交分解（POD）和重定向POD分析了火焰动态特性，并利用重定向POD提取了火焰动态中沿着轴向和径向的周期性传播结构，传播结构的频率与速度脉动频率保持一致，且轴向模态的传播结构最为明显。同时，研究了总当量比对重定向POD模态的影响，分析表明：总当量比增大时，重定向POD模态的拓扑结构会发生变化；重定向POD模态中出现了错位现象，这种现象与相平均图像中的火焰传播行为保持一致。重定向POD方法能够有效提取旋流火焰动态中的传播结构，为旋流火焰燃烧不稳定性的机理研究提供了一种分析工具。

关键词: 航空发动机燃烧室;分层旋流火焰;重定向POD;传播结构;燃烧不稳定性

ZHANG Chi, TAO Chao, HAN Xiao, ZHOU Yu-chen, LIN Yu-zhen. Extraction of Propagation Structure on Stratified Swirl Flame Dynamics under Velocity Fluctuation[J]. Journal of Propulsion Technology, 2021, 42(1): 173-184.

张弛，陶超，韩啸，周宇晨，林宇震. 速度脉动下分层旋流火焰动态传播结构提取[J]. 推进技术, 2021, 42(1): 173-184.

References

[1] 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.
[2] Chu B T. On the Energy Transfer to Small Disturbances in Fluid Flow （Part I）［J］. Acta Mechanica， 1964， 1（3）： 215-234.
[3] McManus K R， Poinsot T， Candel S M. A Review of Active Control of Combustion Instabilities［J］. Progress in Energy and Combustion Science， 1993， 19： 1-29.
[4] Zhao D， Lu Z， Zhao H， et al. A Review of Active Control Approaches in Stabilizing Combustion Systems in Aerospace Industry［J］. Progress in Aerospace Sciences， 2018， 47（3）： 35-60.
[5] Han X， Hui X， Zhang C， et al. Combustion Instabilities in a Lean Premixed Pre-Vaporized Combustor at High-Pressure High-Temperature［R］. ASME GT 2017-65190.
[6] 李国能. 燃烧诱发热声不稳定特性及控制研究［D］. 杭州：浙江大学， 2009.
[7] 李磊，孙晓峰. 推进动力系统燃烧不稳定性产生的机理、预测及控制方法［J］. 推进技术， 2010， 31（6）： 710-720.
[8] Ducruix S， Schuller T， Durox D， et al. Combustion Dynamics and Instabilities： Elementary Coupling and Driving Mechanisms［J］. Journal of Propulsion and Power， 2003， 19 （5）： 722-734.
[9] Han X， Laera D， Morgans A S， et al. Flame Macrostructures and Thermoacoustic Instabilities in Stratified Swirling Flames［J］. Proceedings of the Combustion Institute， 2019， 37（4）： 5377-5384.
[10] 张弛，王波，邹鹏飞，等. 同心旋流分层火焰的外激脉动特性统计学分析［J］. 航空动力学报， 2017， 32（8）： 1801-1808.
[11] 张弛，周宇晨，韩啸，等. 同心旋流分层预混火焰的动力学模态分析［J］. 推进技术， 2020， 41（3）： 595-604.
[12] Tautschnig G， Hampel B， Hirsch C， et al. Experimental Investigation of OH* and CH* Chemiluminescence under Varying Operating Conditions［R］. ASME GT 2013-95850.
[13] Sick V. High Speed Imaging in Fundamental and Applied Combustion Research［J］. Proceedings of the Combustion Institute， 2013， 34（2）： 3509-3530.
[14] Ruan C， Chen F， Cai W， et al. Principles of Non-Intrusive Diagnostic Techniques and Their Applications for Fundamental Studies of Combustion Instabilities in Gas Turbine Combustors： a Brief Review［J］. Aerospace Science and Technology， 2019， 84： 585-602.
[15] Iudiciani P， Duwig C， Husseini S M， et al. Proper Orthogonal Decomposition for Experimental Investigation of Flame Instabilities［J］. AIAA Journal， 2012， 50（9）： 1843-1854.
[16] Ek H， Proscia W， Lieuwen T， et al. Re-Oriented POD for Feature Extraction from Time Resolved Reacting Flow Datasets［R］. ASME GT 2019-90954.
[17] Syred N. A Review of Oscillation Mechanisms and the Role of the Processing Vortex Core（PVC） in Swirl Combustion Systems［J］. Progress in Energy and Combustion Science， 2006， 32（2）： 93-161.
[18] Huang Y， Yang V. Dynamics and Stability of Lean-Premixed Swirl-Stabilized Combustion［J］. Progress in Energy and Combustion Science， 2009， 35（4）： 293-364.
[19] Chterev I， Foley C， Foti D， et al. Flame and Flow Topologies in an Annular Swirling Flow［J］. Combustion Seience and Technology， 2014， 186（8）： 1041-1074.
[20] Han X， Laera D， Yang D， et al. Flame Interactions in a Stratified Swirl Burner： Flame Stabilization， Combustion Instabilities and Beating Oscillations［J］. Combustion and Flame， 2020， 212： 500-509.
[21] Schmidt O T， Schmid P J. A Conditional Space-Time POD Formalism for Intermittent and Rare Events： Example of Acoustic Bursts in Turbulent Jets［J］. Journal of Fluid Mechanics， 2019， 867.
[22] 尹芳黎，杨雁莹，王传栋，等. 矩阵奇异值分解及其在高维数据处理中的应用［J］. 数学的实践与认识， 2011， 41（15）： 173-179.
[23] Rajasegar R， Mitsingas C M， Mayhew E， et al. Proper Orthogonal Decomposition for Flame Dynamics of Microwave Plasma Assisted Swirl Stabilized Premixed Flames［C］. Texas： 55th AIAA Aerospace Sciences Meeting， 2017.

Extraction of Propagation Structure on Stratified Swirl Flame Dynamics under Velocity Fluctuation

速度脉动下分层旋流火焰动态传播结构提取

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 0

Recommended Articles

Metrics

Comments