A wind tunnel investigation of ship airwake/rotor downwash coupling using design of experiments methodologies

Doane, Stargel; Landman, Drew

doi:10.2514/6.2012-767

Cited by 7 publications

(7 citation statements)

References 3 publications

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“…The aircraft carrier under study is a LHD (Landing Helicopter Dock) ship type which includes a ski-jump ramp to facilitate take-off operations [14] and a superstructure where bridge, radomes, antennas, stacks and other systems are installed [4,7]. The ship model was made of wood and built at a 1:100 geometric scale to avoid wind tunnel blockage effects.…”

Section: Ship Modelmentioning

confidence: 99%

“…Aircraft carriers are essential for military operations, providing tactical advantages to support maritime tasks far from their country [1,2]. Despite routine operations, pilots have to deal with challenging environments [3,4]. The structure of aircraft carriers is designed with practical rather than aerodynamic considerations [5].…”

Section: Introductionmentioning

confidence: 99%

“…The structure of aircraft carriers is designed with practical rather than aerodynamic considerations [5]. Moreover, the superstructure is essentially a combination of bluff bodies [2,6] with sharp edges and corners, antennas, stacks, radomes… that generate a very complex flow field [4,7]. Hence, pilots must fly through a highly turbulent flow structure [2].…”

Section: Introductionmentioning

confidence: 99%

“…Crosswind direction is the critical one due to the fact that the massive flow detachment generates a turbulent shear layer and a low velocity recirculation bubble over the flight deck [1,2,11]. Consequently, pilots have to handle with workload increment [4,12] and low safety levels during on board operations [13].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of the Aerodynamic Flow in the Aircraft Carrier Ski-jump by means of PIV

Bardera¹,

León-Calero²,

Rodríguez-Sevillano³

2017

JMSS

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Computational Fluid Dynamics (CFD) methods have opened a new field to perform aerodynamic studies saving money and time. The difficulties presented by this method to calculate complex flow field problems imply that CFD validation is needed to provide correct results. Experimental data have recently been used to validate the accuracy of CFD predictions. Particle Image Velocimetry (PIV) has shown to be a powerful tool in the investigation of complex flows. The aim of this paper is to present results from PIV experiments that would be interesting for CFD validation. Regarding aircraft operations, the short runway available implies the necessity of equipment which helps to take-off performances. Ski-jump ramp system improves aircraft performances by an increment of lift resulting in successful take-off operations. The ski-jump ramp presence generates a complex flow bounded by a turbulent shear layer and a low velocity recirculation bubble over the end of the flight deck. The adverse effects on the aircraft aerodynamics affect to pilot safe operations, so this region is an interesting problem to be studied by means of wind tunnel experimental tests.

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Section: Ship Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of the Aerodynamic Flow in the Aircraft Carrier Ski-jump by means of PIV

Bardera¹,

León-Calero²,

Rodríguez-Sevillano³

2017

JMSS

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“…Several studies have been performed to investigate the helicopter/ship DI problem. Experimental studies [6][7][8][9] include wind-tunnel measurements of the ship airwake, rotor/ship aerodynamic interaction and rotor/terrain interaction. Numerical studies [10][11][12] include characterization of ship wakes with different numerical models, interaction of rotor/ship and rotor/terrain interaction, integration of the results into simulation environment and simultaneous CFD simulations of ship/aircraft and other efforts 13,14 to couple CFD and flight dynamics to capture coupling interactions as proposed in this study.…”

Section: Introductionmentioning

confidence: 99%

Towards real-time pilot-in-the-loop CFD simulations of helicopter/ship dynamic interface

Oruc

Horn

Shipman

et al. 2017

Int. J. Model. Simul. Sci. Comput.

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This study presents the development of computationally efficient coupling of NavierStokes Computational Fluid Dynamics (CFD) with a helicopter flight dynamics model with the ultimate goal of real-time simulation of airwake effects in the helicopter/ship Dynamic Interface (DI). The flight dynamics model is free to move within a computational domain, where the main rotor forces are converted to source terms in the momentum equations of the CFD solution using an actuator disk model. Simultaneously, the CFD solver calculates induced velocities that are fed back to the simulation and affect the aerodynamic loads in the flight dynamics. The CFD solver models the inflow, ground effect and interactional aerodynamics in the flight dynamics simulation, and these calculations can be coupled with the solution of the external flow (e.g., ship airwake effects). The simulation framework for fully-coupled pilot-in-the-loop (PIL) flight dynamics/CFD is demonstrated for a simplified shedding wake. Initial tests were performed with 0.38 million structured grid cells running on 352 processors and showed near-real-time performance. Improvements to the coupling interface are described that allow the simulation run at near-real-time execution speeds on currently available computing platforms. Improvements in computing hardware are expected to allow real-time simulations.

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Coupled flight dynamics and CFD – demonstration for helicopters in shipborne environment

2017

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A wind tunnel investigation of ship airwake/rotor downwash coupling using design of experiments methodologies

Cited by 7 publications

References 3 publications

Experimental Investigation of the Aerodynamic Flow in the Aircraft Carrier Ski-jump by means of PIV

Experimental Investigation of the Aerodynamic Flow in the Aircraft Carrier Ski-jump by means of PIV

Towards real-time pilot-in-the-loop CFD simulations of helicopter/ship dynamic interface

Coupled flight dynamics and CFD – demonstration for helicopters in shipborne environment

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