### Flame-pressure interactions and stretched laminar flame velocities: implicit simulation methods with realistic chemistry

- Series
- Math Physics Seminar
- Time
- Monday, March 26, 2012 - 12:00 for 1 hour (actually 50 minutes)
- Location
- Skiles 006
- Speaker
- Nadeem Malik – King Fahd University of Petroleum and Minerals

An
implicit method [1, 2], TARDIS (Transient Advection Reaction
Diffusion Implicit Simulations), has been developed that successfully
couples the compressible flow to the comprehensive chemistry and
multi-component transport properties. TARDIS has been demonstrated in
application to two fundamental combustion problems of great interest.
First,
TARDIS was used to investigate stretched laminar flame velocities in
eight flame configurations: outwardly and inwardly propagating
H2/air and CH4/air in cylindrical and spherical geometries.
Fractional power laws are observed between the velocity deficit and
the flame curvature Second,
the response of transient outwardly propagating premixed H2/air and
CH4/air flames subjected to joint pressure and equivalence ratio
oscillations were investigated. A fuller version of the abstract can be obtained from http://www.math.gatech.edu/~rll6/malik_abstract-Apr-2012.docx
[1]
Malik, N.A. and Lindstedt, R.P. The response of transient
inhomogeneous flames to pressure fluctuations and stretch: planar
and outwardly propagating hydrogen/air flames.
Combust.
Sci. Tech. 82(9), 2010.
[2]
Malik,
N. A. “Fractional
powers laws in stretched flame velocities in finite thickness flames:
a numerical study using realistic chemistry”.
Under
review, (2012).
[3]
Markstein, G.H. Non-steady Flame Propagation. Pergamon Press, 1964.
[4]
Weis,M., Zarzalis, N., and Suntz, R. Experimental study of markstein
number effects on laminar flamelet velocity in turbulent premixed
flames. Combust. Flame,
154:671--691, 2008.