Results 51 to 60 of about 91 (81)

A Fundamental Investigation of Ship Airwake Influence on Rotorcraft

Proceedings of the Vertical Flight Society 80th Annual Forum and Technology Display
Rotorcraft 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, Glen R. Whitehouse, Jeffrey D. Keller   +2 more
openaire   +1 more source

Ship airwake effects on the helicopter rotor aerodynamic loads

19th Atmospheric Flight Mechanics Conference, 1994
A 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
openaire   +1 more source

Numerical Modeling of Coupled VSTOL-Ship Airwake Flowfields

Volume 2, Parts A and B, 2004
Validation 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
openaire   +1 more source

Thrust Prediction for A Rotor Operating in A Ship Airwake

2015
This report details work performed at Old Dominion University focused on developing a thrust prediction capability for a rotor operating in a ship airwake. The study has built upon previous experimental work utilizing particle image velocimetry-based velocity field measurements to quantify the degree of coupling in a simplified rotor/ship airwake ...
openaire   +1 more source

Ship airwakes in waves and motions and effects on helicopter operation

2019
<p>This thesis focuses on the effects of wave-induced motions on the airwake of a ship and on the operation of a helicopter in the airwake. While the topic is broad, efforts are concentrated on understanding fundamentals of the ship’s airwake structure at varying Reynolds (Re) numbers without motions, using available experimental data for ...
Gregory M. Dooley, Pablo M. Carrica, Juan E. Martin, James H J Buchholz   +3 more
openaire   +1 more source

Flow Structures of Ship Airwakes with Quartering Winds

AIAA SCITECH 2023 Forum, 2023
Kaijus H. Palm, Zheng Zhang, Ebenezer P. Gnanamanickam, John G. Leishman   +3 more
openaire   +1 more source

Analysis of Ship Airwakes Using Modal Analysis

AIAA SCITECH 2022 Forum, 2022
Nicholas Zhu, John G. Leishman, Zheng Zhang, Ebenezer Gnanamanickam   +3 more
openaire   +1 more source

Experimental investigations into the effect of at-sea conditions on ship airwake characteristics

Journal of Wind Engineering and Industrial Aerodynamics, 2022
Alanna Wall, Eric Thornhill, Hali Barber   +2 more
exaly  

Comparative assessment of URANS, SAS and DES turbulence modeling in the predictions of massively separated ship airwake characteristics

Ocean Engineering, 2021
S Shukla, R Vijayakumar
exaly  

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

Ocean Engineering, 2023
Jin Taek Chung
exaly