旋转机翼悬停气动特性研究

摘要

鸭式旋转机翼（CRW）是一种先进的高速直升机方案，旋翼同时也是机翼，是其最关键气动部件之一。采用结构分区拼接网格技术进行空间离散，分区建立参考系，通过求解多重参考系下的 N—S 方程来计算旋翼流场，首先以传统的 Caradonna—Tung 实验旋翼的亚、跨声速悬停流场分析为例验证该方法的可靠性，进而采用该方法对旋转机翼悬停流场进行了数值计算，旋翼拉力计算值和地面实验值吻合较好，结果分析表明旋转机翼的悬停流场有着不同于传统旋翼的流场特性。%The Canard Rotor/Wing(CRW)is an advanced high—speed rotorcraft concept.The rotor is also acting as the wing,and is one of the most important aerodynamic components of the plane.Hence,study on the hovering rotor/wing flow fields and its aerodynamic characteristics are of great value in theory and in practice.In this paper,the multi—block structural patched—grid is used to partition the space into several subzones,in which different references are chosen.So the hovering rotor/wing flow fields is calculated by solving Navier—Stokes equations in Multiple Reference Frames(MRF).The Caradonna—Tung rotor case is computed first to validate the meth—od.Then a rotor/wing case is calculated and the thrust agrees well with experiment data obtained on the ground testing.The analysis indicates that the hovering flow fields for rotor/wing is quite different from those for traditional rotors.