THERMAL SCIENCE

International Scientific Journal

Velmurugan Thirusangu

,

Parammasivam Kanjikoil Mahali

A CFD ANALYSIS OF CONTROLLED FLUTTER PHENOMENON

ABSTRACT
In the present study, the concept of aero elastic wind energy generator is utilized wind turbines and it applied to produce electricity at low wind speeds. Flutter is the mechanism of dynamic instability in which the energy can be extracted from the wind. This energy might possibly transform into electric power. A straight rectangular wing with single degree of freedom at stalling angle is employed to do suitable work for producing power. A computational model of aero elastic wind energy generator is developed by using ICEM CFD and the flow analysis is carried out at different speeds for the prediction of co-efficient of power for the proposed device. Further a small model is experimentally fabricated and tested in a wind tunnel with different velocities using non-linear theory to predict the power co-efficient of a model. The test results from experiment are compared with the computational results. Thus it is evident that the correlated results are accurate within the acceptable range. The input from the flow analysis is used for structural analysis in ANSYS. The frequency, amplitude of oscillation and phase response of the proposed system can be obtained and it compared with the numerical values from MATLAB simulation of the same system to ensure for obtaining sustained oscillation which is capable of producing power. The flutter mechanism is having the advantage of producing power at very low velocity, eventhough low efficiency.
KEYWORDS
renewable energy, torsional flutter, CFD, aero elasticity
PAPER SUBMITTED: 2015-09-12
PAPER REVISED: 2016-01-07
PAPER ACCEPTED: 2016-02-25
PUBLISHED ONLINE: 2016-11-13
DOI REFERENCE: https://doi.org/10.2298/TSCI16S4955T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Supplement 4, PAGES [S955 - S965]
REFERENCES
  1. Harb, A., Energy Harvesting: State of the Art, J. Renewable En ergy, 36 (2011), 10, pp. 2641-2654
  2. Stephen, N. G., On Energy Harvesting From Ambient Vibration, J. Sound Vib., 293 (2006), 1-2, pp. 409-425
  3. Bisplinghoff, R. L., et al., Aero Elasticity, Dover Publications Inc., Mineola, N. Y., USA, 1955
  4. Poirel, D., et al., Self-Sustained Aero Elastic Oscillations of a Naca0012 Air foil at Low-to-Moderate Reynolds Numbers, J. Fluids Struct., 24 (2008), 5, pp. 700-719
  5. Fung, Y. C., An Introduction to the Theory of Aero Elasticity, Dover Publications, Mineola, N. Y., USA, 1969
  6. Wang, Y.-W., et al., Combination of CFD & CSD Packages for Fluid Structure Interaction, J. Hydrodyn, 20 (2008), 6, pp. 756-761
  7. Kamakoti, R., et al., Fluid-Structure Interaction for Aero Elastic Applications, Progress in Aerospace Sciences, 40 (2005), 8, pp. 535-598
  8. Caracoglia, L., Feasibility Assessment of a Leading-Edge-Flutter Wind Power Generator, J. Wind Eng. Ind. Aerodyn.; 98 (2010), 10-11, pp. 679-686
  9. Sharma, U., Effects Of Airfoil Geometry and Mechanical Characteristics on the on Set of Flutter, Ph. D. The sis, Georgia Institute of Technology, Atlanta, Geo., USA, 2004
  10. Dang, H., et al., Accelerated Loosely Coupled CFD/CSD method for Nonlinear Static Aeroelastic Analysis, Aero space Science and Technology, 14 (2010), 4, pp. 250-258
  11. Lee, B. H. K., et al., Analysis and Computation of Nonlinear Dynamic Response of a Two-Degree-of Freedom System and its Application in Aero Elasticity, J. Fluids Struct., 11 (1997), 3, pp. 225-246
  12. Silva, W. A., Bartels, R. E., Development of Reduced-Order Model for Aero Elastic Analysis and Flitter Prediction Using Cfl3dv6.0 Code, Journal of Fluids and Structures, 19 (2009), 6, pp. 729-745
  13. Poirel, D., Yuan, W., Aerodynamics of Laminar Separation Flitter at a Transitional Reynolds Number, J. Fluids Struct., 26 (2010), 7-8, pp. 1174-1194
  14. Abbott, I. H., Von Doenhoff, A. E., Theory of Wing Sections. Dover Publications, Inc., Mineola, N. Y., USA, 1959
  15. Theodorsen, T., General Theory of Aerodynamic In stability and the Mechanism of Flitter, Report No. 496, NASA, Washing ton DC, 1935
  16. Goura, G. S. L., et al., A Data Ex change Method for Fluid-Structure Interaction Problems, Aeronautical Journal-New Series, 105 (2001), Apr., pp. 215-221
  17. Hoke, C. M., Comparison of Over set Grid and Grid Deformation Techniques Applied to 2-D Naca Air-foils, Proceedings, 19th AIAA Computational Fluid Dynamics Conference, San Antonio, Tex., USA, 2009
  18. Eleni, D. C., et al., Evaluation of Turbulence Models for the Simulation of Flow Over a NACA 0012 Air-foil, Journal of Mechanical Engineering Research, 4 (2012), 3, pp. 100-111
  19. Wang, D. A., et al., Electromagnetic Energy Harvesting from Flow Induced Vibration, Microelectron, Microelectron Journal, 41 (2010), 6, pp. 356-364
  20. Goodarz, A., Aeroelasticity Wind Energy Converter, Journal of Energy Conversion, 18 (1978), 2, pp. 115-120
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A CFD analysis of controlled flutter phenomenon

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