Experimental investigation of flowfield about a multielement airfoil

During airplane’s take-off, higher lift force should be provided by wing used high lift devices, and the drag should be lower. The design basis of high lift devices with good aerodynamic characteristic is the design of the multi-element airfoil. When a multi-element airfoil is used Gurney flap, lift coefficient can be improved while drag coefficient is also increased, but the lift-to-drag ratio is reduced. In this paper, the numerical simulation method is used to study the aerodynamic characteristic of the multi-element airfoil used Gurney flap with slat in the configuration of take-off. Lift coefficient and drag coefficient of the multi-element airfoil with Gurney flap can be reduced by slat while lift-to-drag ratio of airfoil is increased. Through the comparisons of the multi-element airfoils with Gurney flap with different types of slats, the optimized multi-element airfoil with higher lift coefficient and lower drag coefficient is obtained ultimately.

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“…Anti-drag effectiveness of the multi-element airfoil with Gurney flap with slat during take-off is evaluated. [4,5]…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Drag Reduction on Gurney Flaps by an Three-Element Airfoil

Liu

Yang

Tian

2011

AMM

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Nonintrusive measurements of the boundary layer developing on a single and two circular cylinders

Lee

Basu

1997

Experiments in Fluids

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A fast and reliable overset unstructured grids approach

Kang

Yan

et al. 2013

Acta Mech Sin

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A cell-centred overset unstructured grids approach is developed. In this approach, the intergrid boundary is initially established based on the wall distance from the cell centre, and is then optimized. To accelerate the intergrid-boundary definition much more, a neighbor-toneighbor donor search algorithm based on advancing-front method is modified with the help of minimum cuboid boxes. To simplify the communications between different grid cell types and to obtain second-order spatial accuracy, a new interpolation method is constructed based on linear reconstruction, which employs only one layer of fringe cells along the intergrid boundary. For unsteady flows with relative motion, the intergrid boundary can be redefined fast and automatically. Several numerical results show that the present dynamic overset unstructured grids approach is accurate and reliable.

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Experimental investigation of flowfield about a multielement airfoil

Cited by 45 publications

References 4 publications

An Investigation of Drag Reduction on Gurney Flaps by an Three-Element Airfoil

An Investigation of Drag Reduction on Gurney Flaps by an Three-Element Airfoil

Nonintrusive measurements of the boundary layer developing on a single and two circular cylinders

A fast and reliable overset unstructured grids approach

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