某型通用飞机机翼2.5D重构优化设计

Optimization Design of 2.5D Reconstruction of a General Aircraft Wing

为了扩展某型通用飞机机翼优化设计的工程应用范围,在巡航状态下RAE2822-TE翼型优化设计基础上,考虑到翼型本身结构的优化及径向分布,对机翼进行2.5D重构优化设计研究。根据某型通用飞机的低空飞行条件,设计出了集Hicks-Henne参数化、CFD数值计算和NLPQL优化算法为一体的翼型优化方案,将优化后的翼型按照原机翼参数对其进行8个剖面的重构建模。结果表明:优化后的翼型的升力系数和升阻比提升明显,俯仰力矩系数优于原翼型,具备更优异的气动特性;2.5D重构优化的机翼巡航升力系数提升了6.19%,巡航性能提升了2.27%,更好满足通用低速飞机的飞行需求,验证了二维翼型优化转三维机翼2.5D设计方法的合理性和实用性,有效引导工程优化设计思想。

In order to expand the engineering application range of the wing optimization design of a general aircraft,based on the RAE2822-TE airfoil optimization design in cruise state,taking into account the optimization and radial distribution of the airfoil itself,the 2.5D reconstruction of the wing optimization design research.According to the low-altitude flight conditions of a general aircraft,an airfoil optimization scheme that integrates Hicks-Henne parameterization,CFD numerical calculation and NLPQL optimization algorithm is designed.The optimized airfoil was remodeled with 8 sections according to the original wing parameters.The result indicated that the optimized airfoil's lift coefficient and lifi-to-drag ratio are significantly improved,the pitch torque coefficient is better than the original airfoil,and it has better aerodynamic characteristics;the 2.5D reconstruction optimized wing cruise lift coeficient is increased by 6.19%.The cruise performance has been improved by 2.27%,which can better meet the flight requirements of general low-speed aircraft.It has verified the rationality and practicability of the 2.5D design method of two-dimensional airfoil optimization to three-dimensional wing,which effectively guides engineering optimization design ideas.