A Simple Illustration of Turbulent Flame Ball Growth
- 1 January 1995
- journal article
- research article
- Published by Taylor & Francis in Combustion Science and Technology
- Vol. 104 (1-3) , 19-32
- https://doi.org/10.1080/00102209508907708
Abstract
A flame ball growing into a turbulent mixture exhibits a speed which is proportional to its size - this effect is a consequence of the distorted flame surface: the inner flame regions “push” the outer regions, the magnitude of this velocity depends upon the flame surface density distribution. A simple two-dimensional, zero-thickness flame model interacting with defined eddies illustrates how rapidly this flame distortion occurs after a spark ignition. This distributed volume source effect is also the functional form of Groffs modified entrainment model of flame propagation. A result of this size dependent growth is exponential growth of flame area which is an essential feature of spark-ignition internal combustion engines.Keywords
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