Optimization design of loitering munition airfoils based on the CST parameterization method

DOI:	10.11809/bqzbgcxb2023.06.018
Keywords:	loitering munition; small Reynolds number; airfoil optimization; CST parameterization; sequential quadratic programming
Abstract:	This paper optimizes an airfoil E387 with a small Reynolds number to meet the airfoil requirements of a loitering munition with a small Reynolds number, which are quite different from those of a traditional aircraft. Based on the CST parameterization method, this paper analyzes the matching degree of E387 airfoils under different Bernstein polynomial orders. The sequential quadratic programming is used as the optimization method to achieve the optimization goal by improving the lift to drag ratio. The results show that, under specific flight conditions, the airfoil lift coefficient after optimization design increases by 11.127% and lift to drag ratio increases by 4.173%. The lift coefficient of the loitering munition with the optimized airfoils increases by 9.531%, and the lift to drag ratio increases by 6.326%, which improves the upper and lower pressure distribution of the wing in a low Reynolds environment, and improves the aerodynamic performance of the loitering munition as a whole. It provides theoretical basis and design reference for loitering munition airfoils with a small Reynolds number.
Issue:	Vol. 44 No. 6 (2023)
Published:	2023-06-28
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