Erica: The European Tiltrotor.  Design and Critical Technology Projects

Alli, P.

doi:10.2514/6.2003-2515

Cited by 12 publications

(10 citation statements)

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“…During the 1950s, the tiltwing concept was first explored by the Vertol Division of Boeing company, which designed (Ref. 22 26). The main feature of ERICA is the capability to rotate the outer part of the high-mounted wing as well as the rotor-nacelle group that is located at the wing tip.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic Interaction between Rotor and Tilting Wing in Hovering Flight Condition

Droandi¹,

Zanotti²,

Gibertini³

2015

j am helicopter soc

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The hovering performance and the lifting capability of tiltrotor aircraft are strongly affected by the aerodynamic interaction between wing and rotors. The tiltwing concept represents an interesting technology to increase the hover performance by reducing the wing-rotor interference. The present work investigates the aerodynamic interaction between wing and rotor in hover for a scaled tiltwing aircraft half-span model. A comprehensive experimental campaign, including force measurements and particle image velocimetry surveys, was performed together with computational fluid dynamics simulations. Numerical predictions were validated using experimental data and were used to describe the flow field. Nomenclature

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Section: Introductionmentioning

confidence: 99%

Aerodynamic Interaction between Rotor and Tilting Wing in Hovering Flight Condition

Droandi¹,

Zanotti²,

Gibertini³

2015

j am helicopter soc

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“…In this regard, the research project NICETRIP (Novel Innovative Competitive Effective Tilt Rotor Integrated Project) was funded by the European Union to develop a database covering aerodynamic interactional phenomena and other technology aspects of tiltwing vehicles. In this framework, a 1:5 motorised model‐scale tiltrotor was designed and manufactured under the name of ERICA and experiments were undertaken using the 9.5×9.5m DNW‐LLF (German‐Dutch Wind Tunnels Large Low‐Speed Facility) and the 8m S1MA ONERA wind tunnels. For this study, an aeroplane configuration was selected, where the rotor blades were fully resolved.…”

Section: Demonstration Of the Methods And Discussion Of The Resultsmentioning

confidence: 99%

Assessment of a high‐order MUSCL method for rotor flows

Jiménez-García

Barakos

2018

Numerical Methods in Fluids

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Summary This work presents the implementation of a high‐order, finite‐volume scheme suitable for rotor flows. The formulation is based on the variable extrapolation MUSCL‐scheme, where high‐order spatial accuracy (up to fourth‐order) is achieved using correction terms obtained through successive differentiation. A variety of results are presented, including 2‐ and 3‐dimensional test cases. Results with the proposed scheme, showed better wake and higher resolution of vortical structures compared with the standard MUSCL, even when coarse meshes were employed. The method was also demonstrated for 3‐dimensional unsteady flows using overset and moving grids for the UH‐60A rotor in forward flight and the Enhanced Rotorcraft Innovative Concept Achievement tiltrotor in aeroplane mode. For medium grids, the present method adds reasonable CPU and memory overheads and offers good accuracy on relatively coarse grids.

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“…The shape optimisation of the air-intake S-duct of the European platform tiltrotor ERICA (Enhanced Rotorcraft Competitive Effective Concept Achievement) (6) , illustrated in Fig. 1, was the object of TILTOp (Efficient Shape Optimization of Intake and Exhaust of a Tiltrotor Nacelle) research project carried out by the Green Rotorcraft GRC2 consortium in the frame of the CleanSky European Programme (7) .…”

Section: Introductionmentioning

confidence: 99%

Wind-tunnel tests of the ERICA tiltrotor optimised air-intake

et al. 2018

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Wind-tunnel tests were carried out to evaluate the performance of the Computational Fluid Dynamics (CFD)-based air-intake duct shape optimisation of the European platform tiltrotor ERICA. A 1/2.5 scale model including the nacelle, the external portion of the wing and two interchangeable internal ducts reproducing the baseline and optimised shape were manufactered to be tested in the large wind tunnel of Politecnico di Milano. Moreover, tests were carried out with the model equipped with rotating blade stubs. The comprehensive experimental campaign included tests reproducing different forward flight conditions of the aircraft including cruise and conversion phases. The evaluation of the internal duct performance was carried out by measuring total pressure losses and flow distortion by directional probes at the Aerodynamic Interface Plane (AIP). Additional pressure measurements were carried out on the internal surface of the duct to compare the pressure distributions along the air-intake. The experimental results confirmed that the optimised duct offers significantly improved performance with respect to the baseline configuration not only in cruise, representing the flight condition considered for the CFD optimisation, but also for the conversion condition. In particular, a remarkable reduction of the total pressure drop at the AIP was found with the optimised duct with the only exception for the stubs-on configuration in cruise. Indeed, the present investigation highlighted that the design of the blade stubs, particularly their length, represents a very critical aspect for air-intake performance tests due to significant disturbances that could be induced by the stubs’ wake on the internal duct flow.

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Erica: The European Tiltrotor. Design and Critical Technology Projects

Cited by 12 publications

References 0 publications

Aerodynamic Interaction between Rotor and Tilting Wing in Hovering Flight Condition

Aerodynamic Interaction between Rotor and Tilting Wing in Hovering Flight Condition

Assessment of a high‐order MUSCL method for rotor flows

Wind-tunnel tests of the ERICA tiltrotor optimised air-intake

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