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Large Eddy Breakup Devices as Low Reynolds Number Airfoils
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English
Abstract
Turbulent drag reduction downstream of large-eddy breakup (LEBU) devices is analyzed from the viewpoint of low-Reynolds number airfoil aerodynamics. It is argued that the variability of results between different research labs is primarily due to low Reynolds number “phenomena” associated with unsteady separation/transition of the LEBU device boundary layer. LEBU drag reduction is shown to be an extremely sensitive function of device micro-geometry at the low Reynolds numbers of all current investigations, and by analogy with conventional low-Reynolds number airfoil testing, the conclusion is drawn that the full potential for LEBU drag reduction must be explored at chord Reynolds numbers of 300,000 and above.
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Citation
Anders, J., "Large Eddy Breakup Devices as Low Reynolds Number Airfoils," SAE Technical Paper 861769, 1986, https://doi.org/10.4271/861769.Also In
References
- Bushnell D. M. “Turbulent Drag Reduction for External Flows” AIAA Paper No. 83-0227 January 1983
- Yajnik K. S. Ancharya M. “Non-equilibrium Effects in a Turbulent Boundary Layer Due to the Destruction of Large Eddies,” National Aeronautical Lab Bangalore NAL-BL-7 August 1977
- Hefner J. N. Weinstein L. M. Bushnell D. M. “Large-Eddy Breakup Scheme for Turbulent Viscous Drag Reduction” Symposium on Viscous Drag Reduction Dallas, Texas Nov. 7-8, 1979
- Corke T. C. Guezennec Y. Nagib H. M. “Modifications of Drag of Turbulent Boundary Layers Resulting From Manipulation of Large-Scale Structures” Symposium on Viscous Drag Reduction Dallas, Texax Nov. 7-8, 1979
- Corke T. C. Guezennec Y. Nagib H. M. “Modifications of Drag of Turbulent Boundary Layers Resulting From Manipulation of Large-Scale Structures” NASA CR-3444 July 1981
- Corke T. C. Nagib H. M. Guezennec Y. “A New View on Origin Role and Manipulation of Large Scales in Turbulent Boundary Layers” NASA CR-165861 February 1982
- Bertelrud A. Truong T. V. Avellan F “Drag Reduction in Turbulent Boundary Layers Using Ribbons” AIAA Paper No. 82-1370 August 1982
- Hefner J. N. Anders J. B. Bushnell D. M. “Alteration of Outer Flow Structures for Turbulent Drag Reduction” AIAA Paper No. 83-0293 January 1983
- Sreenivasan K. R. “Turbulence Control and Drag Reduction” Report Summitted to the Air Force Office of Scientific Research January 1983
- Takagi S. “The Structure of Turbulent Boundary Layer Controlled by the Plates” Proceedings of the 15th Turbulence Symposium Tokyo, Japan July 1983
- Nguyen V. D. Dickinson J. Jean J. Chalifour Y. Anderson J. Lemay J. Haeberle D. Larose C. “Some Experimental Observations of the Law of the Wall Behind Large-Eddy Breakup Devices Using Servo-Controlled Skin Friction Balances” AIAA Paper No. 84-0346 January 1984
- Anders J. B. Hefner J. N. Bushnell D. M. “Performance of Large-Eddy Breakup Devices at Post-Transitional Reynolds Numbers” AIAA Paper No. 84-0345 January 1984
- Mumford J. C. Savill A. M. “Parametric Studies of Flat PIate Turbulence Manipulators Including Direct Drag Results and Laser Flow Visualization” ASME Symposium on Laminar/Turbulent Boundary Layers: Control, Modification and Marine Applications, ETCE Conference New Orleans, Louisiana Feb. 1984
- Bushnell D. M. Anders J. B. Walsh M. J. Mclnville R. V. “Turbulent Drag Reduction Research,” Improvement of Aerodynamic Performance Through Boundary Layer Control and High Lift Systems, ACARD Conference Proceeding No. 365 May 1984
- Bertelrud Arild “Full Scale Experiments Into the Use of Large-Eddy Breakup Devices for Drag Reduction on Aircraft” AGARD Symposium on Improvement of Aerodynamic Performance Through Boundary Layer Control and High Lift Systems, AGARD Conference Proceedings No. 365 May 1984
- Nagib H. Guezenner Y. Plesniak M. “Management of Turbulent Structures in Boundary Layers Aimed at Drag Reduction” NASA CR-174491 May 1984
- Bushnell D. M. “Body-Turbulence Inter-action” AIAA Paper No. 84-1527 June 1984
- Chui Kwing-So “A Survey of the Turbulent Drag Reduction Using Passive Devices” NMI, Ltd. Report R193 July 1984
- Corke T. C. “Digital Image Filtering in Visualized Boundary Layers” AIAA Journal 22 8 Aug. 1984
- Plesniak M. W. “Optimized Manipulation of Turbulent Boundary Layers Aimed at Net Drag Reduction” M. S. Thesis Illinois Institute of Technology Chicago, Illinois Dec. 1984
- Lynn T. B. Sreenivasan K. R. “Measurements in Manipulated Turbulent Boundary Layers” Yale University, Department of Mechanical Engineering Report 1-FM-85
- Guezennec Y. Nagib H. M. “Documentation of Mechanisms Leading to Net Drag Reduction in Manipulated Turbulent Boundary Layers” AIAA Paper No. 85-0519 March 1985
- Plesniak M. W. Nagib H. M. “Net Drag Reduction in Turbulent Boundary Layers Resulting From Optimized Manipulation” AIAA Paper No. 85-0518 March 1985
- Bandyopadhyay P. R. “The Performance of Smooth-Wall Drag Reducing Outer-Layer Devices in Rough-Wall Boundary Layers” AIAA Paper No. 85-0558 March 1985
- Lemay J. Provencal D. Gourdeau R. Nguyen V. D. Dickinson J. “More Detailed Measurements Behind Turbulence Manipulators Including Tandem Devices Using Servo-Controlled Balances” AIAA Paper No. 85-0521 March 1985
- Anders J. B. Watson R. D. “Airfoil Large-Eddy Breakup Devices for Turbulent Drag Reduction” AIAA Paper No. 85-0520 March 1985
- Landahl M. T. Henningson D. S. “The Effects of Drag Reduction Measures on Boundary Layer Turbulence Structure-implications of an Inviscid Model” AIAA Paper No. 85-0560 March 1985
- Lynn T. B. Sreenivasan K. R. “Correlation and Length Scale Measurements in Manipulated Boundary Layers” Yale University, Department of Mechanical Engineering Report 2-FM-85 May 1985
- Poddar K. VanAtta C. W. “Turbulent Boundary Layer Drag Reduction on an Axisymmetric Body Using LEBU Manipulators” Proceedings of 5th Symposium on Turbulent Shear Flows Cornell University Ithaca, N.Y. Durst F. Schmidt F. W. et al. Aug. 7-9, 1985
- Coustols E. Cousteix J. “Reduction Du Frottement Turbulent: Moderateurs De Turbulence” 22 EME Colloque D'Aerodynamque Appliquee Lille, France Nov. 13-15, 1985
- Govindaraju S. P. Chambers F. W. “Direct Measurements of Drag of Ribbon Type Manipulators in a Turbulent Boundary Layer” AIAA Paper No. 86-0284 January 1986
- Blackwelder R. F. Chang S. I. “Length Scales and Correlations in “LEBU” Modified Turbulent Boundary Layers” AIAA Paper No. 86-0287 January 1986
- Westphal R. V. “Skin Friction and Reynolds Stress Measurements for a Turbulent Boundary Layer Following Manipulation Using Flat Plates” AIAA Paper No. 86-0283 January 1986
- Sahlin A. Alfredsson P. H. Johansson A. V. “Direct Drag Measurements for a Flat Plate with Passive Boundary Layer Manipulators” Physics of Fluids 29 3 Mar. 1986
- Beeler G. B. “Turbulent Boundary-Layer Wall Pressure Fluctuations Downstream of a Tandem LEBU” AIAA Journal Technical Note 24 4 689 691 Apr. 1986
- Papathanasiou A. G. Nagel R. T. “Boundary Layer Control by Acoustic Excitation” AIAA Paper No. 86-1954 1954
- Rashidnia N. Falco R. E. “Changes in the Turbulent Boundary Layer Structure Associated with Net Drag Reduction by Outer Layer Manipulators” Michigan State University, Turbulence Structure Laboratory Report No. TSL-86-1 May 1986
- Kinney R. B. Taslim M. E. Hung S. C. “Numerical Study of Large-Eddy Breakup and Its Effect on the Drag Characteristics of Boundary Layers” Department of Aerospace and Mechanical Engineering, University of Arizona Final Technical Report on Grant No. NAG-1-141 Jan. 1984
- Dowling A. P. “The Effect of Large-Eddy Breakup Devices on Oncoming Vorticity” J. Fluid Mechanics 160 447 463 1985
- Balakumar P. Widnall S. E. “Application of Unsteady Aerodynamics to Large-Eddy Breakup Devices in a Turbulent Flow” Physics of Fluids 29 6 June 1986
- Lissaman P. B. S. “Low-Reynolds Number Airfoils” Annual Reviews of Fluid Mechanics 1983
- Mueller T. J. Pohlen L. J. Conigliaro P. E. Jansen B. J. “The Influence of Free-Stream Disturbances on Low Reynolds Number Airfoil Experiments” Experiments in Fluids 1 3 14 1985
- Andreopoulos J. Durst F. Zaric Z. Jovanovic J. “Influence of Reynolds Number on Characteristics of Turbulent Wail Boundary Layers” Experiments in Fluids 2 1 7 16 1984
- Acharya M. Escudier M. P. “Measurements of the Wall Shear Stress in Boundary Layer Flows” Proceedings of the 4th Symposium on Turbulent Shear Flows Karisrue, Germany 1983
- Winter K. G. “An Outline of the Techniques Available for the Measurement of Skin Friction in Turbulent Boundary Layers” Progress in Aerospace Sciences 18 Pergamon Press 1 57 1977
- Burns T. F. Mueller T. J. “Experimental Studies of the Eppler 61 Airfoil at Low Reynolds Numbers” AIAA Paper No. 82-0345 January 1982
- Pohlen L. J. Mueller T. J. “Boundary Layer Characteristics of the Miley Airfoil at Low Reynolds Numbers” Journal of Aircraft 21 9 658 664 Sept. 1984
- Mueller T. J. “Low Reynolds Number Vehicles” AGARDograph No. 288 Feb. 1985
- Selig M. S. “The Design of Airfoils at Low Reynolds Numbers” AIAA Paper No. AIAA-85-0074 January 1985
- Mueller T. J. “Aerodynamic Measurements at Low Reynolds Numbers” AIAA Paper No. AIAA-82-0598 March 1983
- Marchman J. F. III Werme T. D. “Clark-Y Airfoil Peformance at Low Reynolds Numbers” AIAA Paper No. 84-0052 January 1984