A parametric study of sound generation by premixed laminar flame annihilation

Abstract

A numerical and theoretical study of sound generation by planar, axisymmetric and spherically symmetric premixed laminar flame annihilation is presented in this paper. The compressible Navier-Stokes, energy, and progress variable equations are solved using Direct Numerical Simulation with one-step chemistry. A theory is developed to relate the pressure amplitude to the flame's propagation velocity and consumption speed, which were identified as key parameters in the generation of sound in our previous study (Talei et al., 2011[38]). The results show that by obtaining the propagation velocity of the flame from the simulations, the sound generation can be predicted accurately for unity Lewis n..