Interactions between the premixed flame front and the three-dimensional Taylor-Green vortex

Zhou, Hao1; You, Jiaping1; Xiong, Shiying1; Yang, Yue1,2,3; Thevenin, Dominique4; Chen, Shiyi1,2,3,5

2019

10.1016/j.proci.2018.08.015

PROCEEDINGS OF THE COMBUSTION INSTITUTE   影响因子和分区

1540-7489

1873-2704

We study interactions between the premixed flame front and evolving vortices using the vortex-surface field (VSF) and direct numerical simulation of a hydrogen/air premixed flame propagating in a three-dimensional Taylor-Green (TG) flow. The VSF, a Lagrangian-based structure identification method, characterizes the evolution of a vortex surface consisting of vortex lines across the flame front. Compared to the VSF evolution in non-reacting TG flows, the flame has an impact on the evolutionary geometry of vortex surfaces. We find that the vortex surfaces merge into bulky structures without rolling-up of vortex tubes and the transition of the TG flow is suppressed in the burnt region. The vortex surfaces near the flame are expanded with a slight increase of vorticity magnitude owing to the flame-generated positive dilation. The VSF deformation in the burnt region, compared to that in the unburnt region during flow transition, is significantly suppressed near impermeable planes and slightly amplified near the flame front. The effects of flame-induced motion on flame dynamics and geometry are twofold. By comparing the wrinkling of isosurfaces of a progress variable in reacting TG flow and isosurfaces of a passive scalar in non-reacting TG flow, we find that the flame can increase its surface area and the scalar gradient by inducing an additional straining field near the flame front, whereas it can smooth the very sharp scalar structures in non-reacting TG flows under vortex straining near impermeable planes. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

Flame/vortex interactions Premixed flames Vortex-surface field Direct numerical simulation

SCI ; EI

英语

其他

National Natural Science Foundation of China[91541204] ; National Natural Science Foundation of China[11522215]

Thermodynamics ; Energy & Fuels ; Engineering

Thermodynamics ; Energy & Fuels ; Engineering, Chemical ; Engineering, Mechanical

WOS:000456621500137

ELSEVIER SCIENCE INC

20183505758050

Direct numerical simulation ; High energy physics ; Numerical models

Fluid Flow, General:631.1

ENGINEERING

Web of Science

1.Peking Univ, Coll Engn, State Key Lab Turbulence & Complex Syst, Beijing 100871, Peoples R China
2.Peking Univ, CAPT, Beijing 100871, Peoples R China
3.Peking Univ, BIC ESAT, Beijing 100871, Peoples R China
4.Univ Magdeburg Otto von Guericke, Lab Fluid Dynam & Tech Flows, D-39106 Magdeburg, Germany
5.South Univ Sci & Technol China, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China

Zhou, Hao,You, Jiaping,Xiong, Shiying,et al. Interactions between the premixed flame front and the three-dimensional Taylor-Green vortex[J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE,2019,37(2):2461-2468.

Zhou, Hao,You, Jiaping,Xiong, Shiying,Yang, Yue,Thevenin, Dominique,&Chen, Shiyi.(2019).Interactions between the premixed flame front and the three-dimensional Taylor-Green vortex.PROCEEDINGS OF THE COMBUSTION INSTITUTE,37(2),2461-2468.

Zhou, Hao,et al."Interactions between the premixed flame front and the three-dimensional Taylor-Green vortex".PROCEEDINGS OF THE COMBUSTION INSTITUTE 37.2(2019):2461-2468.