用双时间法数值模拟悬停旋翼流场(英文)  

Numerical Simulation of a Hovering Rotor Flowfield Using a Dual Time Method

作　　者：江雄[1] 陈作斌[1] 张玉伦[1] 

机构地区：[1]中国空气动力研究与发展中心

出　　处：《空气动力学学报》1998年第3期288-296,共9页Acta Aerodynamica Sinica

摘　　要：本文用改进的双时间法和重叠网格通过求解可压缩的欧拉和Ｎ－Ｓ方程计算了悬停旋翼流场。在双时间法中，我们采用牛顿松弛以加速每个真实时间步中的子迭代。高效的双时间法加上重叠网格使在微机上计算复杂的悬停旋翼流场成为可能，计算结果和实验符合得很好，计算得到的下洗流和载荷证明了我们的方法是可行的。The flowfield for a rotor a blade in hover was computed using an improved dual time method by numerically solving the compressible Euler and Navier Stokes equations on embedded grids.The Newton’s relaxation was employed in the dual time method to speed up the subiteration in each real time step.The highly efficient dual time method and embedded grids make it feasible to compute the complicate flowfield of a hovering rotor on a PC computer.The results compare fairly with the experiment and the computed downstream and load predictions demonstrate the method feasibility.

关 键 词：旋翼 悬停 数值模拟 双时间法 流场 直升机 

分 类 号：V211.52[航空宇航科学与技术—航空宇航推进理论与工程]