Results 71 to 80 of about 291 (106)
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An investigation of ship airwakes using Detached-Eddy Simulation
Computers & Fluids, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Forrest, James S., Owen, Ieuan
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A Conditional Perspective of the Ship Airwake
AIAA JournalThe airwake of a simplified frigate model was measured using a synchronous, dual-plane, stereoscopic particle image velocimetry (PIV) approach. Four pairs of orthogonal streamwise and spanwise plane combinations were surveyed over the flight deck. Synchronous PIV measurements allowed the three-dimensional airwake structure to be examined during two ...
Guillermo Mazzilli +4 more
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An investigation of ship airwake over the frigate afterbody
International Journal of Modern Physics B, 2020When air passes through the hangar of a frigate, the unstable airwake appears in the rear of the hangar, which may significantly increase the workload of the ship-borne helicopter pilot. Therefore, there must be a profound understanding of the characteristics of the airwake.
Tong Li +3 more
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A computational study of unsteady ship airwake
40th AIAA Aerospace Sciences Meeting & Exhibit, 2002Abstract : The superstructure, deck, and other features of large ships produce large separated regions in the airflow over the ship and a variety of vortex flows generated mainly by edges in the geometry. These features are of importance for aircraft operations on and around these ships.
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Numerical Study of Helicopter Rotors in a Ship Airwake
Journal of Aircraft, 2014Operating helicopters in a naval environment is challenging because it imposes a pilot workload significantly higher than that during land-based operations. The aerodynamic interaction between the aircraft and the ship wake is known to play an important role in increasing the pilot workload, hence reducing the aircraft capability as a result of ...
C. Crozon, R. Steijl, G. N. Barakos
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Investigation of Ship Airwakes Using a Hybrid Computational Methodology
Proceedings of the Vertical Flight Society 70th Annual Forum, 2014The simple frigate shape geometry (SFS2) has been studied in free-air and wind tunnel environments for both headwind and yawed flow configurations. The ability of an unsteady Reynolds-Averaged Navier-Stokes (URANS) solver and a URANS/Vorticity Transport hybrid computational methodology to capture the bluff body wake characteristics has been assessed ...
Nicholas Rosenfeld +4 more
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Ship airwake effects on the helicopter rotor aerodynamic loads
19th Atmospheric Flight Mechanics Conference, 1994A previously developed approach to modeling and simulation of ship airwake has been used in the study of airwake effects on rotor aerodynamic loads of a four-bladed articulated rotor system. Using full scale at sea test data, the current study identifies a power spectral model for the vertical component of the ship airwake velocity.
Hong Zhang, J. Prasad, Dimitri Mavris
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Unstructured Grids for Ship Unsteady Airwakes: A Successful Validation
Naval Engineers Journal, 2002ABSTRACTThe unsteady airflow over the aftdeck of the LPD 17 is computed. The primary goal of this paper is to demonstrate that a computational capability is available to confidently predict the airwake about ship superstructures. The unstructured mesh based incompressible flow solver, FEFLO, is used to compute this unsteady flow.
Ravi Ramamurti, William C. Sandberg
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A Fundamental Investigation of Ship Airwake Influence on Rotorcraft
Proceedings of the Vertical Flight Society 80th Annual Forum and Technology DisplayRotorcraft responses to idealized disturbances are examined to gain insights into model fidelity requirements for flight simulations of the ship-rotorcraft dynamic interface. Two disturbance fields are considered: an isolated straight vortex that represents the canonical vortex that results from the corners of flat top ships in oblique wind-over-deck ...
Abhinav Sharma +2 more
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Numerical Modeling of Coupled VSTOL-Ship Airwake Flowfields
Volume 2, Parts A and B, 2004Validation of CRUNCH CFD® for problems of relevance to modeling coupled VSTOL-Ship Airwake flow fields is presented. The basic numerical framework consists of an edge based multi-element unstructured Navier-Stokes solver. The governing equations are solved using an upwind biased MUSCL scheme and an implicit scheme is used for time marching.
S. Arunajatesan, J. Shipman, N. Sinha
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