基于PaSR模型的低旋流燃烧大涡模拟

doi:10.13675/j.cnki.tjjs.190397

推进技术 ›› 2020, Vol. 41 ›› Issue (10): 2260-2275.DOI: 10.13675/j.cnki.tjjs.190397

基于PaSR模型的低旋流燃烧大涡模拟

赖正鑫，肖隐利，宋文艳

西北工业大学动力与能源学院，陕西西安 710072

发布日期:2021-08-15
基金资助:
国家自然科学基金面上项目（51576164）。

Large Eddy Simulation of Low Swirl Combustion Based on PaSR Model

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

Published:2021-08-15

摘要/Abstract

摘要： 为了深入理解低旋流流场特征和燃烧稳定性，基于OpenFOAM平台，采用动态k方程模型和有限速率PaSR模型对甲烷/空气预混低旋流燃烧进行了大涡模拟，研究了气流入口速度、当量比和压力等流场参数对流场结构和燃烧非稳态特性的影响，分析了流场大尺度结构与火焰相互作用。结果表明，流场结构和火焰抬升高度受入口速度影响较小，流场和火焰形态能够保持自相似性；随着当量比和压力提高，流场扩张性增强并在燃烧区下游产生回流区，火焰稳定不依赖回流区，根部火焰锋面形状由U形转变为W形，火焰抬升高度降低。火焰锋面稳定在剪切层，剪切层产生的周期性有序涡结构引起当地流场速度脉动和火焰表面褶皱，反映了流场非稳态特性；通过剪切层监测点瞬时轴向速度分析，涡结构特征频率随速度增大而提高，由250Hz提高至300Hz，随当量比和压力提高而降低，由250Hz降低至125Hz。

关键词: 低旋流燃烧;非稳态特性;有序结构;特征频率;大涡模拟

Abstract: For the purpose of providing the scientific insights of the flow features and flame stability of low swirl combustion， large eddy simulations of premixed methane-air low swirl combustion are conducted using dynamic k-equation subgrid model and finite chemistry model PaSR under several flow conditions including different bulk velocity， equivalence ratio， and pressure based on OpenFOAM. From experimental measurements and large eddy simulation predictions， flow conditions effects on low swirl flow field structure and unsteady characteristics of combustion are performed. Additionally， interaction between large scale vortex structures and flame surface is also discussed. Flow field structure and flame lift off are scarcely influenced by bulk velocity， which suggests the self-similar feature of low swirl combustion under different inflow velocities. As increase of equivalence ratio and pressure， flow streams diverge and generate a recirculation zone in post-flame zone. Besides， the flame base exhibits a transformation from U shape to W shape with flame lift off distance decreases. The flame front is not dominated by recirculation zone but stabilizes in the shear layers， in which coherent vortex structures are periodically generated and result in both local velocity fluctuating as well as flame surface wrinkling. Characteristic frequencies of unsteady shear layer vortex structures are evaluated based on point data analyzing. The results show that the characteristic frequencies raise from 250Hz to 300Hz with the increase of bulk velocity， and decline from 250Hz to 125Hz with the increase of equivalence ratio and pressure.

Key words: Low swirl combustion;Unsteady characteristics;Coherent structure;Characteristic frequency;Large eddy simulation

赖正鑫，肖隐利，宋文艳. 基于PaSR模型的低旋流燃烧大涡模拟[J]. 推进技术, 2020, 41(10): 2260-2275.

LAI Zheng-xin, XIAO Yin-li, SONG Wen-yan. Large Eddy Simulation of Low Swirl Combustion Based on PaSR Model[J]. Journal of Propulsion Technology, 2020, 41(10): 2260-2275.

参考文献

[1] Sarpkaya T. Turbulent Vortex Breakdown［J］. Physics of Fluid， 1995， 7（10）： 2301-2303.
[2] Spencer A， McGuirk J， Midgley K. Vortex Breakdown in Swirling Fuel Injector Flows［J］. Journal of Engineering for Gas Turbines and Power， 2008， 130（2）.
[3] Lieuwen T， Torres H， Johnson C， et al. A Mechanism of Combustion Instability in Lean Premixed Gas Turbine Combustors ［J］. Journal of Engineering for Gas Turbines and Power， 2001， 123（1）： 182-189.
[4] Lieuwen T. Modeling Premixed Combustion-Acoustic Wave Interactions： A Review［J］. Journal of Propulsion and Power， 2003， 19（5）： 765-781.
[5] Cheng R K， Yegian D T， Miyasato M， et al. Scaling and Development of Low-Swirl Burners for Low Emission Furnaces and Boilers ［J］. Proceedings of the Combustion Institute， 2000， 28（1）： 1305-1313.
[6] Mehmet Salih Celek， Pinarbasi Ali. Investigations on Performance and Emission Characteristics of an Industrial Low Swirl Burner while Burning Natural Gas， Methane， Hydrogen-Enriched Natural Gas and Hydrogen as Fuels［J］. International Journal of Hydrogen Energy， 2018， 43（2）： 1194-1207.
[7] 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 and Power， 2008， 130（2）： 277-285.
[8] Nazeer W， Smith K， Sheppard P， et al. Full Scale Testing of a Low Swirl Fuel Injector Concept for Ultra-Low NO_x Gas Turbine Combustion Systems［R］. ASME GT 2006-90150.
[9] Plessing T， Kortschik C， Peters N， et al. Measurements of the Turbulent Burning Velocity and the Structure of Premixed Flames on a Low-Swirl Burner ［J］. Proceedings of the Combustion Institute， 2000， 28（1）： 359-366.
[10] 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.
[11] Day M， Tachibana S， Bell J， et al. A Combined Computational and Experimental Characterization of Lean Premixed Turbulent Low Swirl Laboratory Flames II： Hydrogen Flames［J］. Combustion and Flame， 2015， 162（5）： 2148-2165.
[12] Karthik P， Noble D， Seitzman J M， et al. Measurement of Flame Characteristics of a Low Swirl Burner at High Pressures and Velocities［R］. AIAA 2011-234.
[13] Cheng R K， Littlejohn D. Laboratory Study of Premixed H₂-Air and H₂-N₂-Air Flames in a Low-Swirl Injector for Ultra-Low Emission Gas Turbines ［J］. Journal of Engineering for Gas Turbines and Power， 2007， 129（3）：383-393.
[14] Huang Y， Ratner A. Experimental Investigation of Thermoacoustic Coupling for Low-Swirl Lean Premixed Flames ［J］. Journal of Propulsion and Power， 2009， 25（2）： 365-373.
[15] Tachibana S， Kanai K， Yoshida S， et al. Combined Effect of Spatial and Temporal Variations of Equivalence Ratio on Combustion Instability in a Low-Swirl Combustor［J］. Proceedings of the Combustion Institute， 2015， 35（3）： 3299-3308.
[16] Davis D W， Therkelsen P L， Littlejohn D， et al. Effects of Hydrogen on the Thermo-Acoustics Coupling Mechanisms of Low-Swirl Injector Flames in a Model Gas Turbine Combustor［J］. Proceedings of the Combustion Institute， 2013， 34（2）： 3135-3143.
[17] Emadi M， Kaufman K， Burkhalter M W， et al. Examination of Thermo-Acoustic Instability in a Low Swirl Burner ［J］. International Journal of Hydrogen Energy， 2015， 40（39）： 13594-13603.
[18] 邓洋波，刘阳，朱公志. 低旋流燃烧和流动特性数值模拟研究［J］. 大连海事大学学报， 2009， 35（4）： 99-102.
[19] 邓洋波，宋德彦，徐震，等. 有限空间内低旋流流动与燃烧特性［J］. 航空动力学报， 2015， 30（7）： 1546-1553.
[20] Ouali S， Bentebbiche A， Belmrabet T. Numerical Simulation of Methane-Air Equivalence Ration Effect on Premixed Low Swirl Stabilized Flame［J］. Journal of the Brazilian Society of Mechanical Sciences and Engineering， 2015， 37（2）： 747-760.
[21] Ouali S， Bentebbiche A， Belmrabet T. Numerical Simulation of Swirl and Methane Equivalence Ratio Effects on Premixed Turbulent Flames and NO_x Apparitions［J］. Journal of Applied Fluid Mechanics， 2016， 9（2）： 987-998.
[22] 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， 20（1）： 65-69.
[23] 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.
[24] 陈立，李祥晟. 低旋流CH₄/H₂火焰的燃烧特性及稳定性机制研究［J］. 西安交通大学学报， 2017， 51（1）： 72-78.
[25] Dinesh K R， Kirkpatrick M. Study of Jet Precession， Recirculation and Vortex Breakdown in Turbulent Swirling Jets Using LES［J］. Computers and Fluids， 2009， 38（6）： 1232-1242.
[26] Wang Z， Xu Y， Zhou Z， et al. LES Investigation of Swirl Intensity Effect on Unconfined Turbulent Swirling Premixed Flame［J］. China Science Bulletin， 2014， 59（33）： 4550-4558.
[27] Petersson P， Olofsson J， Brackman C， et al. Simultaneous PIV/OH-PLIF， Rayleigh Thermometry/OH-PLIF and Stereo PIV Measurements in a Low-Swirl Flame［J］. Journal of Applied Optics， 2007， 46（19）： 3928-3936.
[28] Nogenmyr K J， Petersson P， Bai X S， et al. Large Eddy Simulation and Experiments of Stratified Lean Premixed Methane/Air Turbulent Flames［J］. Proceedings of the Combustion Institute， 2007， 31（1）： 1467-1475.
[29] Nogenmyr K J， Fureby C， Bai X S， et al. Large Eddy Simulation and Laser Diagnostic Studies on a Low Swirl Stratified Premixed Flame［J］. Combustion and Flame， 2009， 156（1）： 25-36.
[30] Nogenmyr K J， Petersson P， Bai X S， et al. Structure and Stabilization Mechanism of a Stratified Premixed Low Swirl Flame［J］. Proceedings of the Combustion Institute， 2011， 33（1）： 1567-1574.
[31] Carlsson H， Nordstr?m E， Bohlin A， et al. Large Eddy Simulations and Rotational CARS/PIV/PLIF Measurements of a Lean Premixed Low Swirl Stabilized Flame ［J］. Combustion and Flame， 2014， 161（10）： 2539-2551.
[32] Carlsson H， Carlsson C， Fuchs L， et al. Large Eddy Simulation and Extended Dynamic Mode Decomposition of Flow-Flame Interaction in a Lean Premixed Low Swirl Stabilized Flame ［J］. Flow Turbulence and Combustion， 2014， 93（3）： 505-519.
[33] Shahsavari M， Farshchi M， Arabnejad M. Large Eddy Simulations of Unconfined Non-Reacting and Reacting Turbulent Low Swirl Jets ［J］. Flow Turbulence and Combustion， 2017， 98（3）： 817-840.
[34] Menon S， Yeung P K ，Kim W W. Effect of Subgrid Models on the Computed Interscale Energy Transfer in Isotropic Turbulence［J］. Computers and Fluids， 1996， 25（2）： 165-180.
[35] Shahsavari M， Farshchi M. Large Eddy Simulation of Low Swirl Flames under External Flow Excitations［J］. Flow Turbulence and Combustion， 2018， 100（1）： 249-269.
[36] Germano M， Piomelli U， Moin P， et al. A Dynamic Subgrid-Scale Eddy Viscosity Model ［J］. Physics of Fluids， 1991， 3（3）： 1760-1765.
[37] Gicquel L Y M， Staffelbach G， Poinsot T. Large Eddy Simulations of Gaseous Flames in Gas Turbine Combustion Chambers［J］. Progress in Energy and Combustion Science， 2012， 38（6）： 782-817.
[38] Chomiak J， Karlsson A. Flame Liftoff in Diesel Sprays ［J］. Symposium （International） on Combustion， 1996， 26（2）： 2557-2564.
[39] García-Villalba M， Fr?hlich J， Rodi W. Identification and Analysis of Coherent Structures in the Field of a Turbulent Unconfined Annular Swirling Jet Using Large Eddy Simulation［J］. Physics of Fluids， 2006， 18（5）.
[40] Sweeney M， Hochgreb S， Dunn M， et al. The Structure of Turbulent Stratified and Premixed Methane/Air Flames I： Non-Swirling Flows［J］. Combustion and Flame， 2012， 159（9）： 2896-2911.
[41] Jeong J， Hussain F. On the Identification of a Vortex ［J］. Journal of Fluid Mechanics， 1995， 332（1）： 339-363.

基于PaSR模型的低旋流燃烧大涡模拟

Large Eddy Simulation of Low Swirl Combustion Based on PaSR Model

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价