Trailing vortex free-surface interaction
Neubert, Donald E., Jr.
MetadataShow full item record
An investigation of the interaction of a trailing vortex with a free surface has been undertaken for the purpose of understanding the origin and scars and striations. Velocity and turbulence measurements have been carried out through the use of a Laser-Doppler-Velocimeter (LDV) for various positions of the vortex relative to the free surface. The results have shown that the vortex motion affects the free surface and is affected by it. This mutual interaction leads to the development of surface scars composed primarily of heterostrophic vortices normal to the free surface. Furthermore, the velocity and turbulence characteristics are affected such that the vertical components of turbulence decay rapidly and the horizontal components stretch in the horizontal plane. The experiments have provided sufficient understanding of the physics of the phenomenon for the subsequent undertaking of a predictive numerical model.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Lung, Ming-Hung (Monterey, California. Naval Postgraduate School, 1988-12);The flowfield downstream of a vertically-launched surface-to-air missile model at an angle of attack of 50° and a Reynolds number of 1.1 x 10(5) was investigated in a wind tunnel of the Naval Postgraduate School. The goal ...
Green, James G. (Monterey, California. Naval Postgraduate School, 1989);Interactions of wall jets and vortices embedded in turbulent boundary layers commonly occur near gas turbine blades and endwalls where film cooling is employed. These interactions frequently result in undesirable heat ...
Hofert, Glenn D. (Monterey, California. Naval Postgraduate School, 1994-06);The unsteady flow phenomena resulting from the interaction of vorticity with a free surface has been investigated through the use of a three- color Laser Doppler-Velocimeter. The vorticity field was provided by a single ...