RESEARCH ON THE HYSTERESIS PROPERTIES OF UNSTEADY AERODYNAMICS ABOUT THE OSCILLATING WINGS  

作　　者：高正红 

出　　处：《Applied Mathematics and Mechanics(English Edition)》1999年第8期74-86,共13页应用数学和力学（英文版）

摘　　要：In the work, it is shown the numerical investigations about the unsteady inviscid results obtained for the pitching oscillating wings at different angles of attack. The results are obtained by solving the unsteady Euler equations in a body_fitted coordinate system. It is based on the four_stage Runge_Kutta time stepping scheme. Meanwhile to increase the time step that is limited by Courant limit (CFL), the implicit residual smoothing with local variable parameters is used. As a result, the unsteady aerodynamics about a rectangular wing and a delta wing, which are oscillated in pitching with different frequencies, are shown in this paper. The properties of the unsteady aerodynamics in these cases are researched here.In the work, it is shown the numerical investigations about the unsteady inviscid results obtained for the pitching oscillating wings at different angles of attack. The results are obtained by solving the unsteady Euler equations in a body_fitted coordinate system. It is based on the four_stage Runge_Kutta time stepping scheme. Meanwhile to increase the time step that is limited by Courant limit (CFL), the implicit residual smoothing with local variable parameters is used. As a result, the unsteady aerodynamics about a rectangular wing and a delta wing, which are oscillated in pitching with different frequencies, are shown in this paper. The properties of the unsteady aerodynamics in these cases are researched here.

关 键 词：unsteady flow HYSTERESIS high angle of attach vortical flow 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]