Home – Home – Jornals – Thermophysics and Aeromechanics 2002 number 2

A dispersion equation for the growth rate of small disturbances was obtained, and 1D stability was analysed for different regimes of stretched flame. In contrast to the classical diffusion-thermal instability occurring only at high Lewis numbers, this new type of instability may take place for Lewis numbers either higher or lower than one. Flame pulsations take place at moderate values of velocity gradient; there are no pulsations at low or high values of velocity gradient. The diagram of pulsation instability was obtained. Analytical results are in agreement with results of numerical simulation study [11] and help to explain experimental data [19] obtained under microgravity conditions.