A continuous adjoint method is formulated and implemented for the multi-point shape optimization of airfoils at low Re. The airfoil shape is parametrized with a non-uniform rational B-Spline (NURBS). Optimization studies are carried out for two different objective functions. The first involves an inverse function on the lift coefficient over a range of Re. The objective is to determine a shape that results in a lift coefficient of 0.4 at three values of Re: 10, 100 and 500. The second objective involves a direct function on the lift coefficient over a range of angles of attack,a. The lift coefficient is maximized simultaneously fora= 4o, 8oand 12owhile the Re is held constant. The final shapes from both the cases are compared with those from the single-point optimization at each of the operating point. It is seen that the multi-point shapes are significantly different. They also have a better off-design performance than the geometries from single-point designs.
Srinath, D., Mittal, S., Manek, V. (2009). Multi-point shape optimization of airfoils at low reynolds numbers. Computer Modeling in Engineering & Sciences, 51(2), 169-190. https://doi.org/10.3970/cmes.2009.051.169
Vancouver Style
Srinath D, Mittal S, Manek V. Multi-point shape optimization of airfoils at low reynolds numbers. Comput Model Eng Sci. 2009;51(2):169-190 https://doi.org/10.3970/cmes.2009.051.169
IEEE Style
D. Srinath, S. Mittal, and V. Manek "Multi-Point Shape Optimization of Airfoils at Low Reynolds Numbers," Comput. Model. Eng. Sci., vol. 51, no. 2, pp. 169-190. 2009. https://doi.org/10.3970/cmes.2009.051.169
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