直升机机动飞行旋翼的气动力模拟

 探讨了预测机动飞行旋翼气动力的细节问题。在考察非均匀诱速分布、入流动力学和非定常翼型性能的基础上，建立了一种模拟非定常旋翼气动力的新方法。对某一特定机动科目，首先由逆解技术得到操纵输入和飞行姿态；然后综合应用涡流理论、动力入流理论和非定常翼型气动模型来数值模拟非定常的旋翼气动力。通过样例分析给出了紧急转弯和平飞跃升的计算结果。

MODELING THE AERODYNAMIC FORCES OF A MANEUVERING HELICOPTER ROTOR

This paper examines the details of predicting the aerodynamic forces of a maneuvering helicopter rotor.A new approach to modeling the unsteady rotor aerodynamic forces is established based on the insight into the nonuniform induced velocity distribution,inflow dynamics and unsteady airfoil behavior.For a specified maneuver,the rotor control inputs and helicopter flight attitudes during the maneuvering are first obtained using an inverse solution technique.Then the unsteady rotor forces are numerically simulated by synthetically applying the vortex theory, dynamic inflow theory and unseady airfoil aerodynamic models.Good results of the sample calculations of lateral jink and pop up maneuvers are obtained.