Results 61 to 70 of about 291 (106)

Numerical evaluation of wind direction effects on the turbulence aerodynamics of a ship airwake [PDF]

Ocean Engineering, 2023
The airwake characteristics around a ship body are an important consideration for helicopter pilots during shipboard operations, as airwake can lead to the formation of massively turbulent flow over the ship deck.
Ali Zamiri, Jin Taek Chung
exaly   +2 more sources

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Experimental Determination of Rotor Thrust in a Ship Airwake

Journal of the American Helicopter Society, 2002
unclassified
exaly   +3 more sources

Space-Time Characterization of Ship Airwakes

AIAA Journal, 2023
The turbulent airwakes produced by a generic navy frigate (Simple Frigate Ship 2) was investigated in a low-speed wind tunnel. The frigate model was subjected to a headwind and immersed in a simulated atmospheric boundary layer. High-speed stereoscopic particle image velocimetry (PIV) was performed at six different spanwise planes over the flight deck.
Nicholas Zhu, Zheng Zhang, Ebenezer Gnanamanickam, J. Gordon Leishman   +3 more
openaire   +1 more source

Effect of ship motion on ship airwake aerodynamics

2020
The effects of ship motion on the flow field over the deck of the ONR Tumblehome geometry were investigated experimentally. Characterization of the flow field is relevant in the context of safe aircraft operation in the wake region and to provide an accurate prediction of aircraft air-loads in simulators for pilots, and to provide a validation data set
Austin Krebill, Corey D Markfort, Albert Ratner, J Ezequiel Martin, James H J Buchholz, Pablo Carrica   +5 more
openaire   +1 more source

Ship Airwake Analysis by CFD Methods

AIP Conference Proceedings, 2007
This study is concerned with computational predictions of the highly unsteady turbulent airwake of nonaviation ships. This is the first step in studying complex flow field of fully coupled helicopter/ship interaction. Numerical simulations carried out in this study are performed by using commercial CFD solver CFX 10.0 and FLUENT 6.2.16.
H. Yesilel, F. O. Edis, Theodore E. Simos, George Psihoyios, Ch. Tsitouras   +4 more
openaire   +1 more source

Grid Generation and Airwake Simulation on Ship

Applied Mechanics and Materials, 2012
Dynamic characteristics of flow field on the ship deck are complex. CFD(Computational Fluid Dynamics) results of LHA ship were verified the accuracy of numerical simulation through compared with the experimental data. Three different grids were generated to discuss and analyze the influence of the prismatic layer grid.
Chang Meng Liu, Ye Gao
openaire   +1 more source

Numerical assessment of incoming atmospheric boundary layer effects generated by various approaches on ship airwake turbulence characteristics [PDF]

Ocean Engineering
The unsteady and extensively separated turbulent airwake flows around a ship’s deck significantly impact helicopter pilot performance during shipboard operations.
Ali Zamiri, Jin Taek Chung
exaly   +2 more sources

Ship Airwake Sensitivities to Modeling Parameters

43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005
** * † Accurate models for the prediction of ship airwake flowfields are critical to the development of realistic flight simulation tools for aircraft carrier launch and recovery operations. The accurate computation of the ship airwake can be very challenging due to the complexity of the ship geometry, the size of and difficulty in generating a ...
Jeremy Shipman, Srinivasan Arunajatesan, Christopher Menchini, Neeraj Sinha   +3 more
openaire   +1 more source

Airwake simulations on an LPD 17 ship

15th AIAA Computational Fluid Dynamics Conference, 2001
The flow over the San Antonio class LPD 17 ship is simulated using Computational Fluid Dynamics (CFD) and parallel computers. Both steady-state and time-accurate results are presented for two yaw cases. The computations are done for inviscid flow with no turbulence modeling.
Anupam Sharma, Lyle Long
openaire   +1 more source

Velocity Measurements in A Ship Airwake With Crosswind

42nd AIAA Fluid Dynamics Conference and Exhibit, 2012
In situ air velocity measurements in the near wake of a Navy training ship are presented for an inflow of 15 to starboard. This data is required for the validation of ship airwake simulations, which are used to determine the launch and recovery envelopes for shipborne rotorcraft and for use in piloted flight simulations.
Cody Brownell, Luksa Luznik, Murray Snyder, Hyung Suk Kang   +3 more
openaire   +1 more source