Forced and Periodic Vortex Breakdown in a Vortex Valve.
MetadataShow full item record
Forced or periodic vortex breakdown resulting from the instability of the impingement, in a vortex valve, of two equal and opposite jets is investigated. Experiments were conducted with a system consisting of a vortex chamber, two tangential jets, and two Helmholtz resonators. The results show that a periodic vortex breakdown is initiated when the velocities of the two opposing tangential jets acquire nearly identical values. The breakdown is accompanied by large pressure oscillations whose magnitude depends on the geometrical characteristics of the system and the magnitudes of the input flows. The major characteristics of the instability are theoretically predicted by a remarkably simple analysis by ignoring the viscous shear losses. The experimental results compare favorably well with those obtained theoretically.
Approved for public release, distribution unlimited
Showing items related by title, author, creator and subject.
Sarpkaya, Turgut; Johnson, S. K. (Monterey, California. Naval Postgraduate School, 1982-06); NPS-69-82-003Experiments were conducted with two Delta wings and a streamlined body with lifting surfaces to investigate the evolution of turbulent trailing vortices in stratified and unstratified water. The vortex trajectories were ...
Connelly, Jonathan S. (Monterey, California. Naval Postgraduate School, 2006-06);This thesis deals with the characterization of the dependence on the flow geometry of the streamwise fluctuations of the stagnation point of vortex breakdown in axisymmetric tubes and over delta wing aircraft. The statistical ...
Interaction, bursting and dynamic control of vortices of a cropped double-delta wing at high angle of attack Alkhozam, Abdullah M. (Monterey, California. Naval Postgraduate School, 1994-03);A flow visualization study of the vortical flow over a cropped double-delta wing model with sharp leading edges and its three derivatives with small geometric modifications (fillets) at the strake wing junction was conducted ...