A modified thickened flame model for simulating extinction

被引:8
|
作者
Comer, Adam L. [1 ]
Gallagher, Timothy P. [1 ]
Duraisamy, Karthik [2 ]
Rankin, Brent A. [3 ]
机构
[1] Innovat Sci Solut Inc, Dayton, OH USA
[2] Univ Michigan, Dept Aerosp Engn, Ann Arbor, MI USA
[3] US Air Force Res Lab, Aerosp Syst Directorate, Wright Patterson AFB, OH USA
关键词
thickened flame; large-eddy simulation; extinction; strain; stretch; LARGE-EDDY SIMULATION; TURBULENT PREMIXED COMBUSTION; NUMERICAL-SIMULATION; LES; FORMULATION;
D O I
10.1080/13647830.2022.2141138
中图分类号
O414.1 [热力学];
学科分类号
摘要
For large-eddy simulation of turbulent premixed reacting flows, major challenges stem from the inability to resolve the flame in a computationally affordable manner. These challenges are most evident in combustors characterized by large domains and thin flames. In these applications, the thickened flame model may be used to extend the flame artificially to a numerically resolvable size through a thickening factor. Thicker flames exhibit suppressed wrinkling in the presence of turbulence, so an efficiency factor increases the flame speed without influencing flame thickness. In contrast to the detailed considerations of unresolved turbulent flame wrinkling, recent work shows that thickened flames do not respond correctly to resolved-scale stretch. In this work, errors in stretch-induced extinction are considered. The already established effect of thickening on extinction is illustrated, and the effect of efficiency factor is characterized in detail. Significant errors in extinction stretch rate are observed analytically and numerically in twin premixed counterflow flame simulations. In general, the original thickened flame formulation does not permit control over extinction, in contrast to its control over freely-propagating-flame thickness and speed. For reactant mixtures with a Lewis number greater than 1, a novel modification of the thickened flame formulation is presented, and through Lewis number adjustments, extinction errors are significantly reduced, while key flame thickening and speed properties of the original formulation are preserved. A test case featuring a turbulent premixed bluff-body-stabilized flame demonstrates that the extinction errors of the original formulation can lead to premature blowoff dynamics and significant statistical errors, if the grid is too coarse. The modified thickened flame model applied to the same grids addresses this issue and provides reasonable flame predictions on all grids, indicating the potential for extending this combustion model to resolutions of greater engineering relevance.
引用
收藏
页码:1262 / 1292
页数:31
相关论文
共 50 条
  • [21] A new Lagrangian flamelet model for local flame extinction and reignition
    Mitarai, S
    Kosály, G
    Riley, JJ
    COMBUSTION AND FLAME, 2004, 137 (03) : 306 - 319
  • [22] PARTIALLY PREMIXED HYDROGEN-METHANE FLAME SIMULATIONS AT RELEVANT GAS TURBINE CONDITIONS WITH A THICKENED FLAME MODEL ENHANCEMENT
    Meloni, R.
    Orsino, S.
    Ansari, N.
    Yadav, R.
    Bessette, D.
    Castellani, S.
    Nassini, P. C.
    Andreini, A.
    Boxx, I.
    PROCEEDINGS OF ASME TURBO EXPO 2023: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, GT2023, VOL 3A, 2023,
  • [23] Perfectly stirred reactor model to evaluate extinction of diffusion flame
    Snegirev, A. Yu.
    COMBUSTION AND FLAME, 2015, 162 (10) : 3622 - 3631
  • [24] A REVIEW OF FLAME EXTINCTION
    WILLIAMS, FA
    FIRE SAFETY JOURNAL, 1981, 3 (03) : 163 - 175
  • [25] Large eddy simulation/thickened flame model simulations of a lean partially premixed gas turbine model combustor
    Zhang, Peiyu
    Park, Ji-Woong
    Wu, Bifen
    Zhao, Xinyu
    COMBUSTION THEORY AND MODELLING, 2021, 25 (07) : 1296 - 1323
  • [26] ASSESSMENT OF THICKENED FLAME MODEL COUPLED WITH FLAMELET GENERATED MANIFOLD ON A LOW-SWIRL PARTIALLY PREMIXED GASEOUS LIFTED FLAME
    Langone, Leonardo
    Amerighi, Matteo
    Mazzei, Lorenzo
    Andreini, Antonio
    Orsino, Stefano
    Ansari, Naseem
    Yadav, Rakesh
    PROCEEDINGS OF ASME TURBO EXPO 2022: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, GT2022, VOL 3B, 2022,
  • [27] Large eddy simulation of flame and thermal-acoustic characteristics in a strut-based scramjet with dynamic thickened flame model
    Yuan, Mengcheng
    Wang, Ping
    Zhang, Yang
    Ferrante, Antonio
    CASE STUDIES IN THERMAL ENGINEERING, 2023, 41
  • [28] A theory for flame extinction based on flame temperature
    Quintiere, JG
    Rangwala, AS
    FIRE AND MATERIALS, 2004, 28 (05) : 387 - 402
  • [29] A Strategy to Couple Thickened Flame Model and Adaptive Mesh Refinement for the LES of Turbulent Premixed Combustion
    Cedric Mehl
    Shuaishuai Liu
    Olivier Colin
    Flow, Turbulence and Combustion, 2021, 107 : 1003 - 1034
  • [30] A Strategy to Couple Thickened Flame Model and Adaptive Mesh Refinement for the LES of Turbulent Premixed Combustion
    Mehl, Cedric
    Liu, Shuaishuai
    Colin, Olivier
    FLOW TURBULENCE AND COMBUSTION, 2021, 107 (04) : 1003 - 1034