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针对低速类大展弦比飞机阵风载荷分析与风场飞行的仿真问题,提出了一种基于二维翼型气动特性的全机三维分布式非线性气动模型的建模方法。将采用该方法的计算结果与采用CFD的计算结果进行了对比,证明了该方法可以精确模拟低速类大展弦比飞机的气动特性。以此为基础,进行了无人机在1-Cosine型阵风作用下的飞行仿真。结果表明,低速类大展弦比飞机在遇到阵风时,会出现与传统问题完全不同的阵风过载与飞行特性。
In order to solve the problem of gust wind load analysis and wind farm flight simulation of low speed large aspect ratio aircraft, a modeling method of whole three-dimensional distributed nonlinear aerodynamic model based on two-dimensional airfoil aerodynamic characteristics is proposed. Comparing the calculation result with the CFD calculation result, it is proved that the method can accurately simulate the aerodynamic characteristics of low-speed large aspect ratio aircraft. Based on this, the flight simulation of UAV under 1-Cosine wind gust was carried out. The results show that the low-speed large aspect ratio aircraft in the face of gusts, there will be completely different from the traditional issues gust overload and flight characteristics.