Results 21 to 30 of about 542 (125)

Rotor wake interactions with an obstacle on the ground [PDF]

, 2018
An investigation of the flow around an obstacle positioned within the wake of a rotor is described. A flow visualisation survey was performed using a smoke wand and particle image velocimetry, and surface pressure measurements on the obstacle were taken.
Giuni, M., Green, R.B., Pickles, D.J.
core   +1 more source

An Active Flow Control over the Ship Deck for Helicopter Shipboard Operations

Aerospace
This paper presents an active flow control of ship airwake over the deck to improve the safety of helicopter shipboard operations in various angles of wind over deck (WOD).
Yi Ye, Renliang Chen, Honglei Ji
doaj   +1 more source

An investigation of coupling ship/rotor flowfield using steady and unsteady rotor methods

Engineering Applications of Computational Fluid Mechanics, 2017
A coupling numerical methodology has been developed using the Navier–Stokes solver for ship/rotor flowfield simulation during the helicopter shipboard launch.
Yongjie Shi, Yi Xu, Kun Zong, Guohua Xu
doaj   +1 more source

A Spectral Analysis of laser Doppler anemometry Turbulent Flow Measurements in a Ship Air Wake [PDF]

, 2015
Helicopters are one of the most important tactical elements in maritime operations. The necessity to improve the conditions in which the landing and take-off operations are carried out leads to the study of the flow that separates from the ship’s ...
Barcala Montejano, Miguel Angel, Bardera Mora, Rafael, González de Diego, Gonzalo, Rodriguez Sevillano, Angel, Ruiz de Sotto, Miguel   +4 more
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Rapid Prediction of High-Resolution 3D Ship Airwake in the Glide Path Based on CFD, BP Neural Network, and DWL

Applied Sciences
To meet the requirements of the high spatiotemporal three-dimensional (3D) airflow field within the glide path corridor during carrier-based aircraft/unmanned aerial vehicles (UAVs) landings, this paper proposes a prediction method for high ...
Qingsong Liu, Gan Ren, Dingfu Zhou, Bo Liu, Zida Li   +4 more
doaj   +1 more source

Experimental Investigation on the Aerodynamic Interaction Between a Helicopter and Ground Obstacles [PDF]

, 2014
In this study, experiments were performed to investigate the aerodynamic interaction between a helicopter and ground obstacles. A new experimental set-up was realised and validated.
C. Parolini, GIBERTINI, GIUSEPPE, GRASSI, DONATO, ZAGAGLIA, DANIELE, ZANOTTI, ALEX   +4 more
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Multivariable control of VTOL aircraft for shipboard landing [PDF]

, 1985
Bibliography: p. 18-19."Research supported by NASA Ames and Langley Research Centers under grant NASA/NAG 2-297."Marc Bodson and Michael ...

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Using piloted simulation to measure pilot workload of landing a helicopter on a small ship [PDF]

, 2017
When conducting landings to a ship's deck in strong winds, helicopter pilot workload is often dominated by the turbulence within the ship's airwake. Previous studies have shown that larger ships create more aggressive airwakes and simulated flight trials
Kelly, MF, Owen, L, Scott, P, White, MD
core  

Research of Wind–Wave–Ship Coupled Effects on Ship Airwake and Helicopter Aerodynamic Characteristics

Journal of Marine Science and Engineering
The oceanic wind and waves, as well as the resultant ship motions, significantly impact the ship airwake and the operation of shipborne helicopters. A numerical method coupling wind, wave, ship and helicopter is developed using multiphase flow, in which ...
Kun Zong, Luyao Qi, Yongjie Shi, Wei Han, Shan Ma   +4 more
doaj   +1 more source

Rotor-Obstacle Aerodynamic Interaction in Hovering Flight: An Experimental Survey [PDF]

, 2016
Despite the presence of a fair number of numerical and experimental works on the rotor-obstacle interaction, a systematic study of the aerodynamic phenomena involved is lacking.
Giuni, Michea, Green, Richard B., Zagaglia, Daniele   +2 more
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