Title :
Investigation of Active Flow Control on Aerodynamic Performance of HALE UAV Airfoil
Author :
Xu, Xiaoping ; Zhou, Zhou ; Fan, Ruijun ; Wang, Junli
Author_Institution :
Nat. Key Lab. of Sci. & Technol. on UAV, Northwestern Polytech. Univ., Xi´´an, China
Abstract :
Numerical studies were conducted to investigate the beneficial effects of using arrays of jets on the aerodynamic characteristics of the High-altitude Long-endurance Unmanned Aerial Vehicle (HALE-UAV) airfoil. Flowfield predictions were made by using an unsteady, two-dimensional, compressible Navier-Stokes flow solver. An unsteady surface transpiration boundary condition was enforced over a user-specified portion of the airfoil´s upper surface to emulate the time-varied velocity out and into the airfoil´s surface. Five flow-control techniques for the ¿quasi-Global Hawk¿ airfoil are investigated,as steady blowing, steady suction, unsteady blowing, unsteady suction and synthetic jets. A physical analysis of the influence on the control efficiency is proposed to provide some guidelines for practice. Our numerical results have indicated that active flow control techniques can, with the careful selection of their position and style, be used to enhance the aerodynamic performance of airfoils.
Keywords :
Navier-Stokes equations; aerodynamics; aerospace components; aircraft; compressible flow; flow control; flow instability; jets; remotely operated vehicles; HALE UAV airfoil; active flow control; aerodynamic performance; flow-control techniques; high-altitude long-endurance unmanned aerial vehicle; synthetic jets; time-varied velocity; unsteady compressible Navier-Stokes flow solver; Actuators; Aerodynamics; Aerospace control; Air traffic control; Aircraft; Automotive components; Fluid flow control; High performance computing; Navier-Stokes equations; Unmanned aerial vehicles; Active Flow control; Aerodynamic performance; Computational fluid dynamics(CFD); Navier-Stokes equations; Numerical simulation; Time-dependent component;
Conference_Titel :
Computer Modeling and Simulation, 2010. ICCMS '10. Second International Conference on
Conference_Location :
Sanya, Hainan
Print_ISBN :
978-1-4244-5642-0
Electronic_ISBN :
978-1-4244-5643-7
DOI :
10.1109/ICCMS.2010.98
