摘要
为研究桨叶上的气动力，用动态入流模型计算的诱导速度，挥舞变形运动带来的相对气流，以及由于桨叶扭转和操纵线系变形带来的桨距角变化综合计入翼型气动环境，然后用Ｌｅｉｓｈｍａｎ和Ｂｅｄｄｏｅｓ发展的非定常气动模型计算了翼型的气动力。同时，考虑了桨尖形状对气动力的影响。最后，采用状态空间法对方程进行了离散化处理，以适合于计算机计算。编制了相应的计算程序，用于计算桨叶的气动载荷及其变形，并用算例分析了本方法的适用性。
Nowadays,researchers focus especially on unsteady aerodynamic load because of its importance for the development of advanced helicopters. An unsteady aerodynamic model is developed for the computation of unsteady aerodynamic load on the rotor blades.It includes the Leishman′s 2 D unsteady model so that the dynamic stall can be predicted.The rotor blade is modeled as an elastic beam with bending and torsion deformation. The Peters He generalized dynamic inflow is also used to compute the induced flow in a finite state formulation,so that the transient aerodynamic loads can be obtained in time domain.This method emphasizes on the aerodynamic environment of blade element affected by the local induced velocity, the relative stream velocity due to body and blade dynamics,and the pitch angle variation due to blade torsion and deformation of control actuation system. At the same time, the impact from blade tip shape is considered.The state space method is used to solve the equation, which is fit for computer calculation. A calculation program is built up and verified by existing data.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
1999年第1期54-60,共7页
Journal of Nanjing University of Aeronautics & Astronautics
基金
"九五"航空预研课题基金
关键词
动态模型
桨叶
动态气动载荷
直升机
旋翼
dynamic models
blades
dynamic inflow
unsteady aerodynamic loads
deform
tip
