Guide to wing aerodynamic design.
Abstract:ESDU 97017 describes the aerodynamic design of swept wings intended primarily for transonic flow; it is concerned with the application of Computational Fluid Dynamics (CFD) but not with the choice of particular software. The process is applicable to all wings but is described in terms of conventional trapezoidal planforms. The various steps in the design process are considered in turn as they would be in a real design study. It starts with consideration of the definition of aerofoil shape, discusses the desired features of the two- and three-dimensional pressure distributions, and explains the benefits of working with surface curvature distribution. The need to maintain a smooth profile for CFD work is emphasised. Application of inverse and optimum design techniques is briefly considered and the implications of viscous effects are introduced. Structural and geometric aspects in determining the jig and flying shapes of the wing are discussed. The modification of the wing design to account for interference due to the effects of fuselage, tip tanks or stores and pylons are discussed and the changes to the pressure distribution illustrated. The specification and use of wind-tunnel models and tests are discussed. The use of flow control devices such as stall strips, fences and vortex generators is explained with a brief consideration of their advantages and limitations. Two tables set out a step-by-step guide to the design process and the one-dimensional isentropic flow relations are listed.
- NACA Aerofoils
- One-Dimensional Flow
- Pressure Coefficient
- Pressure Distribution
- Shock Waves
- Total Temperature
- Vane Vortex Generators
- Wave Drag
- Wind-Tunnel Testing
- Wing-Body Combination
|Data Item ESDU 97017|
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