Correlation of Air Pressure Drop and Flame Arrestor Characteristics for Explosion Suppression Materials

摘要

In this report a theory is presented for predicting the pressure rise versus void fraction in the flame tube located at Wright-Patterson Air Force Base. The effects of initial temperature and pressure are included in the theory. A study of the heat losses in the flame tube is presented and an empirical fit to the cool down phase of the pressure time history data is developed. An equation for correlating the friction factors measured in the pressure drop rig with the hydraulic diameter of the foam is developed. An equation for the critical hydraulic diameter (or quenching diameter) as a function of initial pressure and temperature is also given in the report. The theoretical results are compared to experimental data and are shown to compare favorably.