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Showing 1 to 6 of 6 for “"wake vorticity"”.
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Foundations for Finite-State Modelling of a Two-Dimensional Airfoil that Reverses Direction
<p>Current 3-D finite-state wake models are incapable of simulating a maneuver in which the sign of the free-stream velocity changes direction and the rotor enters its own wake -- as might occur in the case of a helicopter which ascends and then descends. It is the purpose of this work to create a …
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Numerical simulation of unsteady rotor/stator interaction and application to propeller/rudder combination
… while a back hydrofoil is stationary. The wakes of the two hydrofoils are modeled by continuous dipole sheets and determined in time by applying a force free-condition on each wake surface. The wake/hydrofoil interaction is de-singularized by applying a numerical fence on the surface of the …
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Rotor Wakes; Formations, Interactions, and Design
… the fundamental flow physics of rotor wakes and presents a rotor design methodology that enables the creation of mission-tailored wakes for improved aero-propulsive integration. These goals are addressed through a series of experimental campaigns involving both ducted and unducted …
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Hydrodynamics of flexible-body swimming motions
… Multiple, desingularized, infinitesimal wake sheet representation models the nonlinear dynamics of thin shear layer vorticity shed from an arbitrary number of predefined wake separation edges. The integrated performance quantities and the near-body unsteady flow features are corroborated …
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Three-Dimensional Unsteady Hydrodynamics of Tidal Turbines
… the 3D load response is found to be the unsteady wake downwash, which is divided into contributions from the spanwise and streamwise components of wake vorticity. The former is modelled as extending infinitely in 2D models, while the latter is neglected altogether. URANS modelling and a …
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Experimental Determination of Lift and Lift Distributions for Wings In Formation Flight
… with the development of the method. Velocity and vorticity distributions obtained along a near-field plane were processed to calculate wingtip vortex strengths. Additionally, vortex position instabilities and the shedding of vorticity inboard of the wingtips were observed. To determine the …