TY - JOUR
T1 - Study of instabilities on laminar-turbulent transition in a 4 lug-bolt in a confined diffusion flame
AU - De la Cruz, Mauricio
AU - Marti´nez-Espinosa, Eliseo
AU - Polupan, Georgiy
N1 - Publisher Copyright:
© 2016 Avestia Publishing.
PY - 2016
Y1 - 2016
N2 - Velocity fluctuation in a diffusion methane-oxygen flame for three different injection velocities is analyzed numerically in this paper. The work states a 4 Lug-Bolt arrange where oxygen is injected by a central nozzle and methane by four peripheral nozzles. The aim of the numerical simulation is to study the mechanism that affect the mixture process in a diffusion flame by means of Kelvin-Helmholtz instabilities. The simulation is realized with the Reynolds-Averaged Navier-Stokes technique and the realizable k-ε turbulence model is considered in order to model the Reynolds stress tensor. The results show a recirculation zone which is the essential mixture mechanism and has relevant participation on the instabilities development in confined diffusion flames. Furthermore, predictions exhibit a wave frequency increment and wave length instability decrement as velocity injection increase. Therefore, in diffusion flames the Kelvin-Helmholtz instability affects the mixing and reaction zone.
AB - Velocity fluctuation in a diffusion methane-oxygen flame for three different injection velocities is analyzed numerically in this paper. The work states a 4 Lug-Bolt arrange where oxygen is injected by a central nozzle and methane by four peripheral nozzles. The aim of the numerical simulation is to study the mechanism that affect the mixture process in a diffusion flame by means of Kelvin-Helmholtz instabilities. The simulation is realized with the Reynolds-Averaged Navier-Stokes technique and the realizable k-ε turbulence model is considered in order to model the Reynolds stress tensor. The results show a recirculation zone which is the essential mixture mechanism and has relevant participation on the instabilities development in confined diffusion flames. Furthermore, predictions exhibit a wave frequency increment and wave length instability decrement as velocity injection increase. Therefore, in diffusion flames the Kelvin-Helmholtz instability affects the mixing and reaction zone.
KW - Diffusion flame
KW - Fluctuating velocity
KW - Kelvin-Helmholtz instability
KW - Numerical simulation
UR - http://www.scopus.com/inward/record.url?scp=85053294999&partnerID=8YFLogxK
M3 - Artículo de la conferencia
AN - SCOPUS:85053294999
SN - 2369-3029
JO - International Conference on Fluid Flow, Heat and Mass Transfer
JF - International Conference on Fluid Flow, Heat and Mass Transfer
T2 - 3rd International Conference on Fluid Flow, Heat and Mass Transfer, FFHMT 2016
Y2 - 2 May 2016 through 3 May 2016
ER -