Scale Effects in LNG Hazard Analysis and Testing. Progress Report, December 1, 1977--September 30, 1978

摘要

A report is presented on the measurement and analysis of time resolved thermal radiation from combustion of methane, ethane, and propane clouds; the vapor samples were initially contained within a soap bubble. The time scale of the radiant heat pulse was the same as that of the fluid mechanical motion (Fay and Lewis, 1976). The time integrated radiation, as a fraction of the initial fuel heating value, was between 0.09 and 0.15 for these fuels, with some dependence on initial fuel volume. The radiation was explained by a grey gas model, which assumed a uniform time dependent temperature in the spherical cloud and a time independent absorption coefficient. The grey gas temperature was found to decrease monotonically during and after the period of combustion. The absorption coefficient was found to be a function of the initial fuel volume, and fuel type; it was between 10 exp -3 ns 10 exp -2 cm exp -1 and decreased slightly with increasing initial fuel volume. (ERA citation 04:012444)