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Showing 1 to 6 of 6 for “"swirl velocity"”.
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Study of Contra-Rotating Coaxial Rotors in Hover: A Performance Model Based on Blade Element Theory Including Swirl Velocity
… - rotor radius, blade pitch distribution, tip velocity, rotor spacing, number of blades, blade chord, and airfoil's shape through its lift coefficient versus angle of attack slope. Different blade pitch distributions are tried and are assessed based on the power required to hover at the same …
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Comparison of RANS Modeling to Dual-Plane PIV Measurements of the Turbulent Tip Vortex Trailed from a Hovering Rotor
… to accurately predict the core dimension, peak swirl velocity and strength of the tip vortex. The rotational/curvature corrections applied to the Spalart-Allmaras turbulence model better preserved the vortex characteristics to longer wake ages than the same corrections applied to the k-ω SST …
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Secondary air interaction with main flow in axial turbines
… further determined that purge air mass ow and swirl velocity are eective parameters for mitigating loss, with a potential for 70% reduction in purge ow losses. By contrast, purge slot axial inclination and gap width do not affect the loss characteristics of purge ow by more than 6%. The benet …
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Finite element solution of the Navier-Stokes equations for 3-D turbulent free shear flows
… the computation time when compared to the velocity-pressure approach. Numerical solution are obtained for four problems: a round jet issuing from a wall into still surroundings, a three-dimensional square jet issuing from a wall into still surroundings, a uniform flow past a free running …
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Rotor Wakes; Formations, Interactions, and Design
… campaigns. The current program considers the swirl produced by three different propulsive devices: a ducted fan device with standard stators, a ducted fan device with swirling stators, and an open propeller. These devices permit an isolated comparison of the influences of jet axial velocity, …
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Hydrodynamic Stability of Periodically Unsteady Axisymmetric and Swirling Jets
Axisymmetric and swirling jets are generic flows that characterize many natural and man-made flows. These include cylindrical shear layer/mixing layer flows, aircraft jets and wakes, shedding of leading edge and wing tip vortices, tornadoes, astrophysical plasma flows and flows in mechanical …