Passive flow control over the ski-jump of aircraft carriers

Bardera, Rafael; Barcala-Montejano, M.A.; Rodríguez-Sevillano, Ángel Antonio; Nova-Trigueros, Joaquín de

doi:10.1016/j.oceaneng.2016.01.019

Cited by 16 publications

(20 citation statements)

References 9 publications

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“…The actuator selection was based on previous researches. 4,9 This paper presents a study of three actuators with geometric parameters and size variation.…”

Section: Conclusion and Future Investigationsmentioning

confidence: 99%

“…The ski-jump ramp system is characterized by a sharp edge geometry, which generates adverse aerodynamic effects along the flight deck. The recirculation bubble formation at the forward end of the ramp increases the turbulence intensity levels and reduces the relative velocity of the wind; 4 consequently, the aerodynamic lift could be limited.…”

Section: Introductionmentioning

confidence: 99%

“…In the past, some research programs on ship aerodynamic flow control were carried out to mitigate the adverse effects generated over the flight deck. [5][6][7][8][9][10][11][12] Previous research on flow control over a skijump ramp was developed by the authors 4 and was used as starting point for the following study. Those investigations proved that passive flow control devices appear to be a good solution for this problem.…”

Section: Introductionmentioning

confidence: 99%

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Three-dimensional characterization of passive flow control devices over an aircraft carrier ski-jump ramp

Bardera

Rodríguez-Sevillano

León-Calero

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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The aircraft carrier is a key element in modern navies. On-board operations at sea take place under very severe conditions, which affect the aerodynamic flow on the flight deck. The ski-jump ramp is a curved runway that enables the aircraft to takeoff using shorter runway distance. However, this geometry generates strong flow disturbances, mainly characterized by a recirculation bubble at the forward end of the ramp. This phenomenon reduces the aircraft performances and increases the pilot's workload due to the unsteady forces which appear on the control surfaces. Passive flow control appears as a solution to this problem. Wind tunnel experimental research was developed in this study to mitigate the adverse aerodynamic effects of the ski-jump ramp presence. Different devices were tested using particle image velocimetry. Geometrical parameters of the devices were varied to study the effectiveness and select the best solution. Interesting results were found for the columnar vortex generator configurations. The optimum configuration could be applied shortly to the full-scale problem to reduce the adverse aerodynamic effects during takeoff maneuvers.

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“…The actuator selection was based on previous researches. 4,9 This paper presents a study of three actuators with geometric parameters and size variation.…”

Section: Conclusion and Future Investigationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional characterization of passive flow control devices over an aircraft carrier ski-jump ramp

Bardera

Rodríguez-Sevillano

León-Calero

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…Dolzhenkov and Abidin 6 compared the conventional and ski-jump take-off modes based on fundamental parameters. Bardera-Mora et al 7 investigated the control method to minimise adverse aerodynamic effects induced by the ski-jump deck. Besides, electromagnetic launch technology has also gained increasing attention and promotion.…”

Section: Introductionmentioning

confidence: 99%

Multi-body coupling dynamic research of carrier-based aircraft catapult launch based on natural coordinate method

Apeng

Shu

Zhu

2018

Proceedings of the Institution of Mechanical Engineers, Part K:

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There is an increasing demand for predicting the dynamic behaviours of carrier-based aircrafts(CBAs) during catapult launch. This paper presents a maximal parameterised dynamic model of the launch process from a new perspective, and conducts a detailed study of its mechanical behaviours. Based on the topological analysis of the multi-body catapult launch system, the natural coordinate method is adopted to establish a comprehensive model including steam catapult, landing gears, ship motion, aerodynamic and multi-body modules. The predictive capability of the model is demonstrated by presenting the CBA launch dynamic properties under different conditions. First, effects of steam flow area rate and the coupling carrier movement in different directions on catapult performance are discussed. Second, the take-off characteristics as well as the initial catapult attitude are analysed. Then, by investigating Lagrange multipliers, the loads of torque arms, holdback bar and launch bar are compared. Finally, the loads of buffer struts and tyres during launch are also discussed. The results show that it is reasonable to keep the steam flow area increasing in a linear way, but the opening velocity needs to be strictly controlled. When the CBA departs from the deck, the possible sink of the bow is the major threat to the take-off safety, the larger the sink is, the more dangerous the flight becomes. The upwash at the bow may be the primary reason of stall and cannot be ignored. The model established is reliable with capacities of capturing the coupled behaviours between different sub-modules as well as the load change of each component in detail. The natural coordinate method proves to be efficient and accurate, which should be given more attention.

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“…The study of this problem has become more common by using wind tunnel tests [15] and computational methods [16]. Previous researches developed at INTA showed the adverse aerodynamic effect generated in this ship model at ahead wind conditions in the central section of the ski-jump ramp [15].…”

Section: Introductionmentioning

confidence: 99%

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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Passive flow control over the ski-jump of aircraft carriers

Cited by 16 publications

References 9 publications

Three-dimensional characterization of passive flow control devices over an aircraft carrier ski-jump ramp

Three-dimensional characterization of passive flow control devices over an aircraft carrier ski-jump ramp

Multi-body coupling dynamic research of carrier-based aircraft catapult launch based on natural coordinate method

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

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