THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Two-dimensional numerical analysis of active flow control by steady blowing along foil suction side by different urans turbulence models

ABSTRACT
The effects of active separation control by steady blowing jets were investigated numerically on three different examples: subsonic flow past Aerospatiale A air-foil at 13º angle-of-attack, transonic flow past NACA 0012 airfoil at 4º angle-of-attack, and transonic flow in linear compressor/turbine cascade. Performed analyses are two-dimensional, flow is turbulent (or transitional) while fluid is viscous and compressible. Jets are positioned along the suction sides of the foils, the first one being located just upstream of the separation point, and modeled by source terms added to flow equations. Several different jet diameters and intensities are investigated. As the choice of turbulence model affects the final solution of Reynolds equations, turbulence is modeled by four different models: Spalart-Allmaras, realizable k-ε, k-ω SST, and γ-Reθ, and a comparison of obtained results is performed. Goals of the study include definition of an adequate numerical setting that enables sufficiently correct simulation of the problems in question as well as evaluation of the possible increase in aerodynamic performances. Lift coefficients, lift-to-drag ratios or relative pressure differences are improved for all controlled cases.
KEYWORDS
PAPER SUBMITTED: 2016-01-26
PAPER REVISED: 2016-03-21
PAPER ACCEPTED: 2016-06-13
PUBLISHED ONLINE: 2016-08-07
DOI REFERENCE: https://doi.org/10.2298/TSCI160126188S
REFERENCES
  1. Dey, J., Narasimha, R., Integral Method for the Calculation of Incompressible Two-Dimensional Tran-sitional Boundary Layers, Journal of Aircraft, 27 (1990), 10, pp. 859-865
  2. Schlichting, H., Gersten, K., Boundary Layer Theory, Springer, Berlin, 2000
  3. Rodi, W., DES and LES of Some Engineering Flows, Fluid Dynamics Research, 38 (2006), 2-3, pp. 145-173
  4. Qui, L., et al., Airfoil Profile Optimization of an Air Suction Equipment with an Air Duct, Thermal Sci-ence, 19 (2015), 4, pp. 1217-1222
  5. Chen, W-L., et al., Numerical Investigation of Steady Suction Control of Flow around a Circular Cylin-der, Journal of Fluids and Structures, 59 (2015), Nov., pp. 22-36
  6. Genc, M. S., et al., Performance of Transition Model for Predicting Low Re Airfoil Flows without/with Single and Simultaneous Blowing and Suction, European Journal of Mechanics - B/Fluids, 30 (2011), 2, pp. 218-235
  7. ***, ANSYS Fluent Theory Guide, ANSYS, Inc., Canonsburg, Penn., 2015
  8. ***, ANSYS Fluent Customization Manual, ANSYS, Inc., Canonsburg, Penn., 2015
  9. Schmidt, S., Thiele, F., Detached Eddy Simulation of Flow around A-Airfoil, Flow, Turbulence and Combustion, 71 (2003), 1-4, pp. 261-278
  10. Holst, T., Viscous Transonic Airfoil Workshop Compendium of Results, Journal of Aircraft, 25 (1988), 12, pp. 1073-1087
  11. Harris, C., Two-Dimensional Aerodynamic Characteristics of the NACA 0012 Airfoil in the Langley 8-Foot Transonic Pressure Tunnel, NASA-TM-81927, 1981
  12. Schlichting, H., Cascade Flow Problems, AGARD-R-93, 1957
  13. Collis, S. S., et al., Issues in Active Flow Control: Theory, Control, Simulation and Experiment, Pro-gress in Aerospace Sciences, 40 (2004), 4-5, pp. 237-289
  14. Corke, T. C., et al., Single Dielectric Barrier Discharge Plasma Enhanced Aerodynamics, Experiments in Fluids, 46 (2009), 1, pp. 1-26
  15. Zhang, D., et al., Numerical Investigation of Heat Transfer Performance of Synthetic Jet Impingement onto Dimpled/Protrusioned Surface, Thermal Science, 19 (2015), 1, pp. S221-S229
  16. Huang, L., et al., Numerical Study of Blowing and Suction Control Mechanism on NACA0012 Airfoil, Journal of Aircraft, 41 (2004), 5, pp. 1005-1013
  17. Monir, H. E., et al., Tangential Synthetic Jets for Separation Control, Journal of Fluids and Structures, 45 (2014), Feb., pp. 50-65
  18. Yousefi, K., Saleh, R., Three-Dimensional Suction Flow Control and Suction Jet Length Optimization of NACA 0012 Wing, Meccanica, 50 (2015), 6, pp. 1481-1494
  19. De Giorgi, M. G., et al., Comparison between Synthetic Jets and Continuous Jets for Active Flow Con-trol: Application on a NACA 0015 and a Compressor Stator Cascade, Aerospace Science and Technolo-gy, 43 (2015), June, pp. 256-280
  20. Gmelin, C., et al., Active Flow Control Concepts on a Highly Loaded Subsonic Compressor Cascade: Resume of Experimental and Numerical Results, Journal of Turbomachinery, 134 (2012), 6, ID 061021
  21. Svorcan, J., et al., Active Boundary Layer Control in Linear Cascades using CFD and Artificial Neural Networks, Aerospace Science and Technology, 39 (2014), Dec., pp. 243-249