Measurements of jet dispersions simulated in an aeronautical wind tunnel
Brendmoen, Jack Vernon
Netzer, David W.
MetadataShow full item record
A neutrally stable atmospheric surface layer was suitably simulated in a low speed wind tunnel by tripping the boundary layer with a fence and letting the turbulent flow develop over a length of roughness elements. Jet exhaust dispersion characteristics, simulated by a burner/nozzle 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, and nozzle surface blockage were investigated. The results were compared to dispersion methods used in the Air Quality Assessment Model (AQAM) It was found that the experimental jet penetration length was much shorter than 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.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Smith, Larry R. (Monterey, California. Naval Postgraduate School, 2011-12);Pulse Detonation Engines (PDE) operate in a cyclic manner resulting in large changes in the combustion chamber pressure. The widely varying pressure ratio between the chamber and nozzle exit makes it difficult to efficiently ...
Brendmoen, Jack V.; Netzer, David W. (Monterey, California. Naval Postgraduate School, 1979-02); NPS-67-79-012A neutrally stable atmospheric surface layer was simulated in a low speed wind tunnel by tripping the boundary layer with a fence and letting the turbulent flow develop over a length of roughness elements. Turbojet exhaust ...
Investigation of supersonic projectile drag reduction using base injection and free stream combustion Horn, Noel Paul (Monterey, California. Naval Postgraduate School, 1974-03);Base drag accounts for nearly half the total drag of a supersonic projectile. A review is presented of early base flow studies. By relating rate of entropy generation to projectile drag, it is demonstrated that the ...