Active Control of Flow Separation on a High-Lift System with Slotted Flap at High Reynolds Number

The NASA Energy Efficient Transport (EET) airfoil was tested at NASA Langley's Low- Turbulence Pressure Tunnel (LTPT) to assess the effectiveness of distributed Active Flow Control (AFC) concepts on a high-lift system at flight scale Reynolds numbers for a medium-sized transport. The test results indicate presence of strong Reynolds number effects on the high-lift system with the AFC operational, implying the importance of flight-scale testing for implementation of such systems during design of future flight vehicles with AFC. This paper describes the wind tunnel test results obtained at the LTPT for the EET high-lift system for various AFC concepts examined on this airfoil.

[1]  Arvin Shmilovich,et al.  High Reynolds Number Simulation of Distributed Active Flow Control for a High-Lift System , 2007 .

[2]  Harry L. Morgan.  Experimental Test Results of Energy Efficient Transport (EET) High-Lift Airfoil in Langley Low-Turbulence Pressure Tunnel , 2002 .

[3]  M. Meunier.  Simulation and Optimization of Flow Control Strategies for Novel High-Lift Configurations , 2009 .

[4]  John C. H. Lin,et al.  High-Lift System for a Supercritical Airfoil: Simplified by Active Flow Control , 2007 .

[5]  Robert J. Mcghee,et al.  Evaluation of tunnel sidewall boundary-layer-control systems for high-lift airfoil testing , 1991 .

[6]  A. Seifert,et al.  Oscillatory Control of Separation at High Reynolds Numbers , 1999 .

[7]  A. Seifert,et al.  Active Flow Separation Control on Wall-Mounted Hump at High Reynolds Numbers , 2002 .

[8]  A. Seifert,et al.  Compressibility and Excitation Location Effects on High Reynolds Numbers Active Separation Control , 2003 .

[9]  A. Seifert,et al.  Dynamics of Active Separation Control at High Reynolds Numbers , 2000 .

[10]  S Sakurai,et al.  Study of the Application of Separation Control by Unsteady Excitation to Civil Transport Aircraft , 1999 .

[11]  Avi Seifert,et al.  Separation Control at Flight Reynolds Numbers: Lessons Learned and Future Directions , 2000 .

[12]  Avi Seifert,et al.  Active control of separated flows on generic configurations at high Reynolds numbers , 1999 .

[13]  John W. Kiedaisch,et al.  Active Flow Control Applied to High-Lift Airfoils Utilizing Simple Flaps , 2006 .

[14]  Avi Seifert,et al.  Effects of Sweep on Active Separation Control at High Reynolds Numbers , 2003 .

[15]  W. D. Beasley,et al.  Recent modifications and calibration of the Langley low-turbulence pressure tunnel , 1984 .