Nonlinear dynamical responses of small diffusion flames under low frequency AC electric fields

Abstract

A typical canonical nonpremixed jet flame in laboratory scale experiments is a coflow diffusion flame, where buoyancy induced hydrodynamic instability may occur. In general, combustion instabilities are not desirable in terms of pollution emissions [1] and heat release fluctuation. Once heat release rate is coupled with system pressure oscillation, a resonant oscillation might lead to the aggravation of combustor performance [2-4] or structural failure.