Effects of ambient conditions on concurrent-flow flame spread over a wide thin solid in microgravity

Abstract Two-dimensional numerical simulations were performed to study concurrent-flow flame spread over a thin solid in microgravity. The main variable is the ambient flow velocity. Results validated against recent microgravity experiments (Saffire) where samples 41?cm wide burned two different velocities. results showed that, when velocity increases, average radiative heat flux out of surface pyrolysis region remains constant. convective decreases and into increases. net approximately Additional using pressures oxygen percentages further while away from extinction conditions, sample hence mass burning rate are insensitive conditions (i.e., percentage, speed, pressure). Furthermore, steady-state length mainly controlled by entrainment gas-phase reaction zone rate. Based on these observations, analytical model was developed correlate conditions. It predicts for at steady state, have linear dependency pressure forced velocity, second order percentage. proposed correlations tested as well collection data previous range