Combustion Scaling and Modeling: Fire Suppression by Nitrogen Pressurization. V - Test Data, NRL 5000-liter Facility, Test Configurations 4, 5, and 6.

Abstract : Gas mixing rate studies in a 5000-liter cylindrical tank continue. Observations of gas temperatures are made with thermocouple probes during pressurization from 1 to 2 atmospheres through one-, two-, and three-nozzle arrays with diameters of 15.2 millimeters in ca. 30, 16, and 11 s, respectively. Pressurant concentrations may be inferred from temperature measurements. Nine experimental runs are reported in which air is used as both the pressurant and the resident gas under nonfire conditions with no flow obstacles. (Author)