Measurements of Jet Dispersions Simulated in an Aeronautical Wind Tunnel.
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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A neutrally stable atmospheric surface layerr was suitably simulated in a low speed wind tunnel by tripping the boundary laye with a fence and letting the turbulent flow develop over a length of roughness elements. Jet exhaust disperion characteristics, simulated by a burnernozzle system, were investigated by measuring the horizontal and vertical temperature profiles at axial stations downwind from the nozzle exit. Dispersion sensitivity to different nozzle exit conditions, angles of incidence to the wind, the nozzle surface blockage were investigated. The results were compared to disperison methods used in the Air Quality Assessment Model AQAM. It was found that the experimental jet penetration length was much shorter than that assumed in AQAM, and that a plume rise existed, which is not included in the current AQAM model. Required inputs of the initial dispersion coefficients were determined as a function of wind direction. Author
- Fluid Mechanics
- Combustion and Ignition
- Air Pollution and Control