Effects of oscillation frequency and amplitude on separation in an unsteady turbulent flow.
Miller, J. A.
MetadataShow full item record
A two-dimensional model was developed and used in a preliminary investigation of the relationship between flow oscillation frequency, oscillation amplitude, and turbulent boundary layer separation in a low speed, oscillating wind tunnel. It was found that the frequency of oscillation had a profound effect upon the amplitude of oscillation and flow separation. Frequencies from 20 Hz to 28 Hz and 70 Hz to 80 Hz allowed attachment of the boundary layer, while other frequencies, up to 100 Hz, caused flow separation in eighteen degree divergent section.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Platzer, Maximilian F. (The United States of America as represented by the Secretary of the Navy, Washington, DC (US), 1999-11-02);A new method for boundary layer energization and boundary layer propulsion for use on vehicles moving through fluids, which comprises mounting small airfoils parallel or perpendicular to the vehicle's surface, said airfoils ...
Tuite, Joseph M. (Monterey, California. Naval Postgraduate School, 1999-03);The boiling of a highly wetting dielectric fluid, in an oscillating environment, has been investigated. Because of low surface tension, these liquids require very high superheat to initiate nucleate boiling. This high ...
Yue, Jiannwoei (Monterey, California. Naval Postgraduate School, 1996-09);Flapping airfoils generate thrust-producing jet-like wakes. It therefore is the objective of this investigation to explore whether this feature can be used for effective flow control. To this end, the flow ...