Simulation of Microgravity Diffusion Flames Using Sub-Atmospheric Pressures

摘要

Unlike nonbuoyant flames generated in microgravity facilities, low-pressure flames have lower soot-volume fractions. Although the results from the near-vacuum measurements are consistent with the trends from high pressure combustion experiments, they are not consistent with results recorded from diffusion flame experiments in drop towers, flights aboard parabolic aircraft, or aboard the International Space Station. The main conclusions can be summarized as follows: 1) It is evident that factors, aside from low buoyancy, are present during microgravity combustion, which may not be fully captured using subatmospheric flames.