基于NURBS曲线的多段翼成形方法与验证

随着民机市场对大型客机的要求不断提高,增升装置的重要性日渐凸显。增升装置可以有效地提高飞机起降阶段的升阻性能。传统增升装置主要包括前缘下垂、前缘缝翼、后缘襟翼等。增升装置外形复杂,设计难度大,设计过程中不仅需要考虑多种增升装置之间的相互影响,还要考虑如何在不破坏干净构型气动外形的基础上实现增升装置的设计,并且增升装置外形精度对气动性能的影响极大,因此需要对其气动外形参数化设计方法进行研究。一套有效的增升装置气动外形参数化设计方法可以极大提高设计效率,缩减研发成本。基于NURBS曲线的可塑性和可控性,提出一种多段翼切割曲线参数化设计方法,实现了对多种干净构型增升装置的成形设计,并验证了该方法的可行性和通用性。

Multi-section wing forming method and verification based on NURBS curve

With the increasing requirements of the civil aircraft market for large passenger aircraft, the importance of high lift devices has become increasingly prominent. The high lift device can effectively improve the lift-drag performance of the aircraft during takeoff and landing. Traditional high lift devices mainly include leading edge sag, leading edge slats, trailing edge flaps, etc. The shape of lift device is complex and difficult to design. During the design process, it is not only necessary to consider the interaction between multiple lift devices, but also how to realize the design of the lift device without destroying the aerodynamic shape of the clean configuration. Moreover, the shape accuracy of lift device has a great influence on the aerodynamic performance, so it is necessary to study the aerodynamic shape parametric design method. An effective parametric design method for the aerodynamic configuration of the lifting device can greatly improve design efficiency and reduce R&D costs. Based on the plasticity and controllability of the NURBS curve, this paper proposes a parametric design method for multi-segment wing cutting curve, and realizes the forming design of a variety of clean configuration lift devices, which verifies the feasibility and versatility of the method.