Computed Radiation Effects on Thin Fuel Flame Spread in Quiescent Microgravity Environment

摘要

In the first part of this work, a detailed parametric study on the effects between gas phase and solid phase radiation onrnflame spread over a thin fuel in a quiescent microgravity environment is investigated, in which the values of the solidrnfuel total emittance (ε) and total absorptance (α) are varied. Radiative heat transfer becomes an important mechismrnbecause it acts both as a heat feedback to the solid and as a heat loss from both the solid and gas phases. Flame spreadrnrates and low oxygen extinction limits show a strong dependence on the solid properties ε and α. In the second part ofrnthis work, the model is applied to flame spreading over Kimwipes and the initial effort to compare with experimentalrndata is described.