EXPERIMENTS WITH HEAVY GAS JETS IN LAMINAR AND TURBULENT CROSS-FLOWS

A wind tunnel study was performed to determine the dispersion characte ristics of gas jets with densities heavier than that of air. The exper iments were done in a laminar cross-flow and then repeated in a turbul ent boundary layer. All major boundary-layer characteristics were meas ured and compared with corresponding field data. Jet dispersion was in vestigated photographically and by means of concentration measurements . Positions of maximum plume rise and of plume touch-down as well as t he concentrations at these locations have been determined and compared with corresponding results from earlier studies. The most remarkable differences were found in the high densimetric Froude number range, wh ich is characteristic of jets emerging from release valves of pressuri zed storage tanks.