Numerical Simulation of a Vertical, turbulent Wall Fire in Space Vehicles in Weak Gravity

摘要

A numerical simulation is carried out for a turbulent wall fire occurring and spreading over a combustible vertical wall under the condition of weak gravity. Based on a high Reynolds number k-ε model, numerical turbulence models are developed to include effects of buoyancy and radiative heat loss, the former still playing a nonegligible role in weak gravity situations. One-step overall irreversible chemical reaction is employed with fast chemistry and reaction heat is released to couple aerodynamics with chemistry and turbulence.