Design and Performance of Circulation Control Flap Systems

Golden, Rory; Marshall, P. David

doi:10.2514/6.2010-1053

Cited by 18 publications

(7 citation statements)

References 18 publications

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“…Unlike many early CCW designs 6 , which incorporated rounded trailing edge airfoils, this circulation control system utilizes a sharp trailing edge with a dual radius flap. The flap has been shown to keep the flow attached longer over the Coanda surface, resulting in less momentum loss 7 . It should be noted there is a similar slot located on the leading edge of the wing.…”

Section: A Advanced Model For Extreme Lift and Improved Aeroacousticmentioning

confidence: 99%

Investigation of the Unsteady Behavior of a Circulation Control Wing Using Computational Fluid Dynamics

Lichtwardt

Marshall

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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This paper details the results of an investigation into the unsteady behavior of a circulation control wing using computational fluid dynamics. Oscillations in the lift coefficient of up to 10% are observed for steady state simulations. An investigation into the source of the unsteadiness is underway, and the results to date are presented. It is shown that the periodic oscillations are independent of the above the wing mounted engine effects on the cruise efficient short takeoff and landing aircraft. The oscillations are also a viscous phenomenon that does not dampen as the solution marches through steady state. It is proposed that the cause of the oscillations is due to high streamline curvature at the trailing edge inboard wing section, due to flow turning caused by the slot flow normal condition at the circulation control slots. This paper presents the results into the origin of this unsteadiness.

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Section: A Advanced Model For Extreme Lift and Improved Aeroacousticmentioning

confidence: 99%

Investigation of the Unsteady Behavior of a Circulation Control Wing Using Computational Fluid Dynamics

Lichtwardt

Marshall

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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“…The chosen configuration will utilize CCW as high lift devices 3 to achieve the short take-off and landing capabilities of the aircraft 4 . The main tasks GTRI sought to achieve with the wind tunnel experiments were to gain thorough understanding of geometric and pneumatic interactions between CCW and USB or over the wing (OTW) powered lift 5 as well as perform dual-radius CCW 6 flap experiments with and without blowing.…”

Section: Introductionmentioning

confidence: 99%

Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration

Marcos

Marshall

2010

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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This paper demonstrates the use of CFD as a validation tool for wind tunnel data on 2D high lift airfoil with a 3D engine performed by Georgia Tech Research Institute. Results of this validation will assist in determining the appropriate turbulence models, boundary conditions, mesh characteristics and other CFD modeling techniques necessary to capture the complicated flow physics associated with the coupling of circulation control wings and engine exhaust flows. It was found that grid issues and the two-equation turbulence model, k-ε, over predicted lift as blowing momentum increases even with the additional complexity of having an over the wing engine. The detailed techniques utilized to most accurately capture the flow properties, including lift forces and flow field characteristics, are provided and discussed.

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“…Although extremely time consuming, the end result is a very high quality mesh necessary to capture all pertinent flow features. For this NRA, there has been 2-dimensional work that has utilized fully structured meshes and can be seen in Lane et al [40], Golden et al [2] and Storm et al [1]. The work from this paper has built and improved upon the methods learned thus far in simulating circulation control flow fields into the 3-D domain.…”

Section: Mesh Generationmentioning

confidence: 99%

“…The design was conducted by Golden et al [2]. The mechanical simplification of circulation control devices over traditional flaps and slats help reduce noise and drag upon takeoff and landing.…”

Section: Circulation Control Reviewmentioning

confidence: 99%

COMPARISON OF UNSTRUCTURED & STRUCTURED MESHING FOR A CIRCULATION CONTROL WING & ENGINE CONFIGURATION USING RANS CFD

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Design and Performance of Circulation Control Flap Systems

Cited by 18 publications

References 18 publications

Investigation of the Unsteady Behavior of a Circulation Control Wing Using Computational Fluid Dynamics

Investigation of the Unsteady Behavior of a Circulation Control Wing Using Computational Fluid Dynamics

Computational and Experimental Comparison of a Powered Lift, Upper Surface Blowing Configuration

COMPARISON OF UNSTRUCTURED & STRUCTURED MESHING FOR A CIRCULATION CONTROL WING & ENGINE CONFIGURATION USING RANS CFD

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