Flame Front Propagation in Nonsteady Hydrodynamic Fields
- 1 December 1988
- journal article
- research article
- Published by Taylor & Francis in Combustion Science and Technology
- Vol. 62 (4-6) , 273-284
- https://doi.org/10.1080/00102208808924013
Abstract
We show asymptotically and numerically that a constant-density flame will exhibit different geometrical shapes which depend on the flow time-scales. In particular, a frozen flow may yield a flame surface composed of bulges connected by cusps, whereas a pulsating flow may dampen the flame motion to the extent that only a flat, laminar flame surface will be possible. The cusp nature disappears when the eddy frequency becomes comparable to uLk, where uL is the laminar flame speed and k is a characteristic wave number of the flow. Flame shapes obtained with a sheet of laser light within a spark-ignited engine show a cusp nature only at low engine RPM, in agreement with the frequency criteria given above.Keywords
This publication has 12 references indexed in Scilit:
- Fronts propagating with curvature-dependent speed: Algorithms based on Hamilton-Jacobi formulationsJournal of Computational Physics, 1988
- Propagation Velocity of Premixed Turbulent FlamesCombustion Science and Technology, 1988
- Simple Derivation of Yakhot's Turbulent Premixed Flamespeed FormuladCombustion Science and Technology, 1988
- Field equation for interface propagation in an unsteady homogeneous flow fieldPhysical Review A, 1988
- Laminar flamelet concepts in turbulent combustionSymposium (International) on Combustion, 1988
- Vortex Simulation of Unsteady Wrinkled Laminar FlamesCombustion Science and Technology, 1987
- Curvature and the evolution of frontsCommunications in Mathematical Physics, 1985
- Two approximations of solutions of Hamilton-Jacobi equationsMathematics of Computation, 1984
- Stochastic Calculation of Laminar Wrinkled Flame Propagation via Vortex DynamicsCombustion Science and Technology, 1983
- Theory of premixed-flame propagation in large-scale turbulenceJournal of Fluid Mechanics, 1979