Multi-Point Aero-Structural Optimization of Wings Including Planform Variations

Abstract

This paper focuses on wing optimization via control theory using a multi-point design method. Based on the design methodology previously developed for wing section and planform optimization at a specific flight condition, it searches for a single wing shape that performs well over a range of flight conditions. Our previous experience with multipoint design without a detailed FE structural model, showed improvements in performance measures such as drag divergence Mach number and the lift-to-drag ratio over a range of Mach numbers. In the current work, the flow solution is modified to allow for shape deformation under load. We achieve this by coupling SYN107 to FEAP (Robert Taylor, University of California at Berkeley). The resulting aero-elastic simulation is then used to determine the optimal airfoil section and wing planform definition. In the multi-point design the actual shape will now be different at the different design points. With the coupled aero-structural analysis we hope to determine the best jig shape for the multipoint design.

The Application of Suction and Blowing in Performance Improvement of Transonic Airfoils with Shock Control Bump

“…Then, the model is perturbed and given the correct pressure distribution of the original airfoil; the algorithm should nd the airfoil shape in a few optimization cycles. For each ight condition stated in Tables 1 and 2, we use an adjoint gradient based optimization algorithm (based on [24]) to nd optimum values for the bump parameters towards the least drag coe cient. Table 5 shows the initial values of the selected ve design parameters.…”

Hydroelastic optimization of a keel fin of a sailing boat: a multidisciplinary robust formulation for ship design

“…Reuther et al (1999a, b), Mirzaei et al (2007) and Jameson et al (2007). The latter may be expressed as…”

Comparison of Local and Global Constrained Aerodynamic Shape Optimization

“…Computational fluid dynamics (CFD) is at the forefront of aerodynamic analysis capabilities, and application of numerical optimization algorithms with such analysis is termed aerodynamic shape optimization (ASO), and has already produced notable results. [1][2][3] Compressible CFD has been used in numerous optimizations of two-dimensional aerofoil sections, 4, 5 threedimensional aircraft, [6][7][8] and three-dimensional aeroelastic aircraft, 9,10 and there has been a recent increase in activity in the rotor area. [11][12][13][14][15] The authors have also presented work in the optimization area, having developed a modularised, generic optimization tool that is applicable to any aerodynamic problem.…”