为了探索可变形飞行器机翼以不同方式变后掠时的气动特性差异及其物理机理,对旋转变后掠和剪切变后掠翼身组合体进行了宽广速域的绕流流场数值模拟,并对其气动特性与机理进行了分析.计算中,采用粘性可压缩流动的数值模拟方法和三棱柱四面体的非结构结构混合网格.结果表明:剪切变后掠具有优于旋转变后掠的特性,前者在宽广的速域内均具有显著优越的升阻比和阻力,主要原因在于不同变后掠方式所引起的流场结构的显著差异.%In order to explore the methods of morphing aircraft variable-sweep and their aerodynamic characteristics, numerical simulation of the flow fields of a rotating variable-sweep wing-body and a shearing variable-sweep wing-body was conducted, and the aerodynamic characteristics and its mechanism were analyzed. Numerical simulation method of viscous compressible flow and hybrid grid of prism-hexahedron were used. The results demonstrate that: shearing variable-sweep has better characteristics than rotating variable-sweep in that the former has better lift-to-drag ratio and drag when flying at a speed in the range from M∞ 0. 3 to M∞ 0. 8, and the main reason is distinct flow field structure caused by the different variable-sweep methods.
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