Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L29: Turbulent Wakes
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center Room: B401
Chair: Laurent Mydlarski, McGill University
Abstract ID: BAPS.2018.DFD.L29.7
Abstract: L29.00007 : Characterization of marine propeller model near wake in the presence of external (free stream) turbulence*
5:23 PM–5:36 PM
(US Naval Academy)
High resolution, three dimensional PIV experiments were conducted in the in the US Naval Academy’s recirculating water tunnel (1.8m long test section with 0.41m x 0.41m cross sectional area) with three-bladed marine propeller model (D=13cm). Spatial coverage in the near wake was accomplished via “tiling” of individual fields of view (FIV) of nominally 12x8 cm2 area covering downstream distance from the wake generator (propeller) plane up to approximately 9D downstream.Two separate set of measurements were made: phase locking, i.e. PIV image pairs were triggered at a specific blade location and “free runs” where no phase locking was performed. The resulting flow Reynolds number based on diameter is ReD=2.6x105. Two parameters of the grid generated external (free stream) turbulence are controlled: the streamwise integral length scale of the turbulence and the turbulence intensity. Results will focus on characterizing spatial distributions of ensemble averaged mean wake velocities as well as spatial distribution of wake growth rates and normal and shear turbulent stresses up to 9D downstream from the rotor plane.
*This work of supported in full by the Office of Naval Research.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L29.7
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