Home   >   CSC-OpenAccess Library   >    Manuscript Information
An Experimental Study of the Effect of Partial Premixing Level on the Interaction between the Flame Kernel and Flow Field
Ayman Moustafa Elbaz, Mohy Mansour, Khaled A. Elsayed, Diaaeldin Mohamed
Pages - 9 - 22     |    Revised - 15-05-2013     |    Published - 30-06-2013
Volume - 4   Issue - 1    |    Publication Date - June 2013  Table of Contents
MORE INFORMATION
KEYWORDS
Flame Kernel, Partial Premixed Flame, PIV, Flow Field
ABSTRACT
Flame kernels in spark-ignited combustion systems dominate the flame propagation and combustion stability, performance and emissions. The aim of the present work is to investigate the flow field associated with flame kernel propagation history in partial premixing natural gas turbulent flames. The main parameters under investigation are the degree of partial premixing and jet velocity. Three different degrees of partial premixing and five values of jet velocity between10 and 20 m/s have been selected for the present work at an equivalence ratio of 2. The mean flow field and turbulence intensity are measured using two-dimensional Planar Imaging Velocimetry (PIV). A pulsed Nd: YAG laser is used for flame ignition. The turbulent flow field is captured after the ignition at several time intervals between, 150, and 2500 ?s after ignition. The results show that the flame kernel does not show any significant effect on the scale of mean flow field. On the other hand, the flame kernel increases the global turbulence intensity in flames in comparison with the isothermal cases. The flame kernel propagation is associated with a steep increase in the centerline turbulence intensity of the jet flow. An increase in the degree of partial premixing and/or the jet velocity increases the centerline turbulence intensity accompanying the flame kernel propagation. This leads to break-up of the degree of partial premixing of the flame structure, and hence, decreased flame stability. Also, the higher the degree of partial premixing or the higher the jet velocity leads to more rapid flame kernel extinction. The results show that the rate of flame kernel propagation is very fast at the early stage of the kernel propagation up to the first 300 ?s and then it slows down afterwards.
CITED BY (2)  
1 Mansour, M. S., Elbaz, A. M., & Zayed, M. F. (2014). Flame Kernel Generation and Propagation in Turbulent Partially Premixed Hydrocarbon Jet. Combustion Science and Technology, 186(4-5), 698-711.
2 Barré, D. (2014). Numerical simulation of ignition in aeronautical combustion chambers (Doctoral dissertation).
1 Google Scholar 
2 CiteSeerX 
3 refSeek 
4 Scribd 
5 SlideShare 
6 PdfSR 
A. Dreizler, S. Lindenmaier, U. Maas, J. Hult, M. Alden, C.F. Kaminski. Characterization of a spark ignition system by planar laser induced fluorescence of high repetition rates and comparison with chemical kinetic calculations. Applied Physics 2000; B70:287–294.
A. M. Elbaz, M. Mansour, and D. Mohamed. Experimental Investigation of Flame Kernel Propagation in Partial Premixed Flame. International Journal of Applied Sciences (IJAS)2012; Vol. 3 (2): 21-34.
B.D. Videto, D.A. Santavicca. A turbulent flow system for studying turbulent combustion processes. Combustion Science and Technology 1991; 76:159–164.
C. Arcoumanis, D.R. Hall, and J. H. Whitelaw. An approach to charge stratification in leanburn spark-ignition engines. SAE technical paper 941878 (1994).
C. Arcoumanis, D.R. Hall, and J.H. Whitelaw. Optimizing local charge stratification in a leanburn spark ignition engine. Proc. Instn. Mech. Engrs, Part D: J. Auto. Eng. 1997; 211:145–154.
C. Arcoumanis, M.R. Gold, J.H. Whitelaw, and H.M. Xu. Local mixture injection to extend the lean limit of spark-ignition engines. Exper. Fluids 1999; 26:126–135.
C.C. Huang, S.S. Shy, C.C. Liu, A. Yan. A transition on minimum ignition energy for lean turbulent methane combustion in flamelet and distributed regimes. Proceedings of the Combustion Institute 2007; 31:1401–1409.
C.F. Kaminski, J. Hult, M. Alden, S. Lindenmaier, A. Dreizler, U. Mass, M. Baum. Complex turbulence/chemistry interactions revealed by time resolved fluorescence and direct numerical simulations. Proceedings of the Combustion Institute 2000; 28:399–405.
D. Thevenin, O. Gicquel, J. de Charentenay, R. Hilbert, D. Veynante. Two versus three dimensional direct simulations of turbulent methane flame kernels using realistic chemistry.Proceedings of the Combustion Institute 2003; 29:2031–2039.
D. Thevenin, P.H. Renard, J.C. Rolon, and S. Candel. Extinction processes during a nonpremixed flame / vortex interaction. Proc. Combust. Inst. 1998; 27:719–726.
D.A. Eichenberger, W.L. Roberts. Effect of unsteady stretch on spark-ignited flame kernel survival. Combust. Flame 1999; 118:469–478.
F. EL-Mahallawy, A. Abdelhaffz, M. Mansour. Mixing and nozzle geometry effects on flame structure and stability. Comb. Sci. Technol. 2007; 179: 249-263.
G. Patnaik, and K. Kailasanath. A computational study of local quenching in flame-vortex interactions with radiative losses. Proc. Combust. Inst. 1998; 27:711–717.
K.W. Jenkins, M. Klein, N. Chakraborty, R.S. Cant. Effects of strain rate and curvature on the propagation of a spherical flame kernel in the thin reaction zones regime. Combustion and Flame 2006; 145:415–434.
K.W. Jenkins, R.S. Cant. Curvature effects on flame kernels in a turbulent environment.Proceedings of the Combustion Institute 2002; 29:2023–2029.
M.S. Mansour, , N. Peters, L.U. Schrader. Experimental study of turbulent flame kernel propagation. Experimental Thermal and Fluid Science. 2008; 32:1396–1404.
N. Chakraborty, M. Klein, R.S. Cant. Stretch effects on displacement speed in turbulent premixed flame kernels in the thin reaction zones regime. Proceedings of the Combustion Institute 2007; 31: 1385–1392.
P.H. Renard, J.C. Rolon, D. Thevenin, , and S. Candel. Investigations of heat release,extinction, and time evolution of the flame surface, for a non-premixed flame interacting with a vortex. Combustion and Flame 1999; 117:189–205.
P.H. Renard, J.C. Rolon, D. Thevenin, and S. Candel. Wrinkling, pocket formation and double premixed flame interaction processes. Proc. Combust. Inst. 1998; 27:659–666.
R.R. Maly, in: J.C. Hilliard, G.S. Springer (Eds.). Flow and Combustion in Reciprocating Engines. Plenum Press, New York; 1983.
S. Gashi, J. Hult, K.W. Jenkins, N. Chakraborty, R.S. Cant, C.F.Kaminski. Curvature and wrinkling of premixed flame kernels – comparisons of OH PLIF and DNS data. Proceedings of Combustion Institute 2005; 30:809–817.
V.R. Katta, K.Y. Iisu, and W.M. Roquemore. Local Extinction in an unsteady methane-air jet diffusion flame. Proceedings of the Combustion Institute 1998; 27:1121-1129.
Y. Xiong, W.L. Roberts, M.C. Drake, T.D. Fansler. Investigation of pre-mixed flamekernel/vortex interactions via high-speed imaging. Combust. Flame 2001; 126:1827–1844.
Y. Xiong, W.L. Roberts. Observations on the interaction between a premixed flame kernel and a vortex of different equivalence ratio. Proc. Combust. Inst. 2002; 29:1687–1693.
Dr. Ayman Moustafa Elbaz
University of Helwan - Saudi Arabia
ayman_alhagrasy@meng.helwan.edu.eg
Professor Mohy Mansour
Faculty of Engineering/Mechanical Power Engineering Department, Cairo University Cairo - Egypt
Mr. Khaled A. Elsayed
Faculty of Science/Physics Department, Cairo University Cairo, Egypt - Egypt
Mr. Diaaeldin Mohamed
Faculty of Engineering/Mechanical Power Engineering Department, Cairo University Cairo, Egypt - Egypt


CREATE AUTHOR ACCOUNT
 
LAUNCH YOUR SPECIAL ISSUE
View all special issues >>
 
PUBLICATION VIDEOS