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Evaluation of aerodynamic performance enhancement of Risø_B1 airfoil with an optimized cavity by PIV measurement

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Abstract

Airfoils are mostly inefficient in their off-design conditions. In order to improve the aerodynamic performance of airfoils in these conditions, using an optimized cavity on airfoils as a passive method can be useful. In this study, a cavity on a Risø_B1_18 airfoil, which is used as a wind turbine airfoil, was optimized at an off-design angle of attack by incorporating a genetic algorithm into a RANS flow solver. For the cavity optimization, the geometry and downstream suction surface were defined by 16 parameters, and the lift-to-drag ratio was considered as the cost function at 14° angle of attack. The numerical solution showed that the optimized cavity traps a vortex, which postpones the stall. Due to the uncertainty of CFD especially at off-design conditions, it was necessary to evaluate the performance of the optimized cavity in a wide range of angles of attack. This study used the particle image velocimetry (PIV) measurement method to evaluate the improved flow structures over the optimized cavity. Two models of airfoils with and without the cavity were made of aluminum and installed inside the test section of an open-jet wind tunnel with an air speed of 30 m/s and a cross section of 30 × 30 cm2. The air flow on the suction side of the airfoils was measured at 7°–15° angles of attack by PIV. A comparison between the measured flow fields over the two airfoils showed that the optimized cavity postpones the stall angle by 3°. Furthermore, the cavity increases the momentum behind the airfoil at the angles of attack greater than 9°. After this angle, a further increase in the angle of attack increases the difference between the momentums behind the airfoils with and without cavity. The Risø_B1_18 airfoil with the optimized cavity can be used as a wind turbine airfoil at high angles of attack to increase the stall angle and decrease the instability and fluctuation at off-design conditions.

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References

  • Al-Jaburi K, Feszty D (2018) Passive flow control of dynamic stall via surface-based trapped vortex generators. J Am Helicopter Soc 63(3):1–14

    Article  Google Scholar 

  • Baranov P, Guvernyuk S, Zubin M, Isaev S (2000) Numerical and physical modeling of the circulation flow in a vortex cell in the wall of a rectilinear channel. Fluid Dyn 35(5):663–673

    Article  MATH  Google Scholar 

  • Bardina JE, Huang PG, Coakley TJ (1997) Turbulence modeling, validation, testing and development, NASA Technical Memorandum 110446, (See also J.E. Bardina, P.G. Huang, T.J. Coakley, Turbulence Modeling Validation, AIAA Paper 97-2121)

  • De Gregorio F, Fraioli G (2008) Flow control on a high thickness airfoil by a trapped vortex cavity. In: 14th International symposium on applications of laser techniques to fluid mechanics, Lisbon, Portugal, pp 143–149

  • Djojodihardjo H (2013) Progress and development of Coandă jet and vortex cell for aerodynamic surface circulation control–an overview. SIJ Trans Adv Sp Res Earth Explor (ASREE) 1(1):32–42

    Google Scholar 

  • Donelli R, de Gregorio F, Lanelli P (2008) Flow separation control by a trapped vortex cavity, 7th ERCOFTAC SIG 33. Fluibio workshop

  • Donelli RS, De Gregorio F, Buffoni M, Tutty O (2010a) Control of a trapped vortex in a thick airfoil by steady/unsteady mass flow suction. In: Seventh IUTAM symposium on laminar-turbulent transition. Springer, pp 481–484

  • Donelli RS, Lannelli P, Luliano E, De Rosa D (2010b) Suction optimization on thick airfoil to trap vortices. In: Conference of Italian association of theoretical and applied mechanics

  • Fatehi M, Nili-Ahmadabadi M, Nemotollahi O, Minaiean A, Kim KC (2019) Aerodynamic performance improvement of wind turbine blade by cavity shape optimization. Renew Energy 132:773–785

    Article  Google Scholar 

  • Fertis DG (1994) New airfoil-design concept with improved aerodynamic characteristics. J Aerosp Eng 7(3):328–339

    Article  Google Scholar 

  • Fuglsang P, Bak C (2004) Development of the Risø wind turbine airfoils. Wind Energy 7(2):145–162

    Article  Google Scholar 

  • Fuglsang P, Bak C, Gaunaa M, Antoniou I (2003) Wind tunnel Tests of Risø-B1-18 and Risø-B1-24, Risø-R-1375(EN). Risø National Laboratory, Denmark

    Google Scholar 

  • Gao L, Veerakumar R, Liu Y et al (2019) Quantification of the 3D shapes of the ice structures accreted on a wind turbine airfoil model. J Vis 22:661–667

    Article  Google Scholar 

  • Huang M-K, Chow C-Y (1982) Trapping of a free vortex by Joukowski airfoils. AIAA J 20(3):292–298

    Article  MATH  Google Scholar 

  • Kruppa EW (1977) A wind tunnel investigation of the Kasper vortex concept, AIAA (115704) 2

  • Lasagna D, Luso G (2009) Summary of wind tunnel tests, preliminary analysis VCell 2050-VI EU Program. Contract No: AST4-CT-2005-012139. Deliverable 8.2. 10-December 2009

  • Luo D, Huang D, Sun X (2017) Passive flow control of a stalled airfoil using a microcylinder. J Wind Eng Ind Aerodyn 170:256–273

    Article  Google Scholar 

  • Ma X, Schröder A (2018) Visualization of separated shear layer streaks generated by micro vortex generators based on tomographic PIV. J Vis 21:185–190

    Article  Google Scholar 

  • Menter FR, Kuntz M, Langtry R (2003) Ten years of industrial experience with the SST turbulence model. In: Hanjalic K, Nagano Y, Tummers M (Eds) Turbulence, heat and mass transfer, vol 4, pp 625–632

  • Moshfeghi M, Shams S, Hur N (2017) Aerodynamic performance enhancement analysis of horizontal axis wind turbines using a passive flow control method via split blade. J Wind Eng Ind Aerodyn 167:148–159

    Article  Google Scholar 

  • Nafar-Sefiddashti M, Nili-Ahmadabadi M, Rizi BS, Pourhoseini J (2019) Visualization of flow over a thick airfoil with circular-cross-section riblets at low Reynolds numbers. J Vis 22:877–888

    Article  Google Scholar 

  • Nematollahi O, Kim KC (2017) A feasibility study of solar energy in South Korea. Renew Sustain Energy Rev 77:566–579

    Article  Google Scholar 

  • Nematollahi O, Nili-Ahmadabadi M, Seo H, Kim KC (2019) Effect of acicular vortex generators on the aerodynamic features of a slender delta wing. J Aerosp Sci Technol 86:327–340

    Article  Google Scholar 

  • Rockwell D, Naudascher E (1978) Self-sustaining oscillations of flow past cavities. J Fluids Eng 100(2):152–165

    Article  Google Scholar 

  • Rockwell D, Naudascher E (1979) Self-sustained oscillations of impinging free shear layers. Annu Rev Fluid Mech 11(1):67–94

    Article  Google Scholar 

  • Rossow VJ (1978) Lift enhancement by an externally trapped vortex. J Aircraft 15(9):618–625

    Article  Google Scholar 

  • Saffman P, Sheffield J (1977) Flow over a wing with an attached free vortex. Stud Appl Math 57(2):107–117

    Article  MathSciNet  MATH  Google Scholar 

  • Salleh M, Kamaruddin N, Mohamed-Kassim Z (2018) A qualitative study of vortex trapping capability for lift enhancement on unconventional wing, IOP Conference Series: Materials Science and Engineering. IOP Publishing, p 012054

  • Sharifian MB, Mohamadrezapour Y, Hosseinpour M, Torabzade S (2009) Maximum power control of variable speed wind turbine connected to permanent magnet synchronous generator using chopper equipped with superconductive inductor. J Appl Sci 9(4):777–782

    Article  Google Scholar 

  • Shi S, New T, Liu Y (2014) On the flow behaviour of a vortex-trapping cavity NACA0020 aerofoil at ultra-low Reynolds number. In: 17th international symposium on applications of laser techniques to fluid mechanics, Lisbon, Portugal, pp 07–10

  • Siegel L, Ehrenfried K, Wagner C et al (2018) Cross-correlation analysis of synchronized PIV and microphone measurements of an oscillating airfoil. J Vis 21:381–395

    Article  Google Scholar 

  • Taherian G, Nili-Ahmadabadi M, Karimi MH, Tavakoli MR (2017) Flow visualization over a thick blunt trailing-edge airfoil with base cavity at low Reynolds numbers using PIV technique. J Vis 20(4):695–710

    Article  Google Scholar 

  • Thielicke W, Stamhuis E (2014) PIVlab–towards user-friendly, affordable and accurate digital particle image velocimetry in MATLAB. J Open Res Softw 2(1)

  • Van Rooij R, Timmer W (2003) Roughness sensitivity considerations for thick rotor blade airfoils, Transactions-American Society of Mechanical Engineers. J SolEnergy Eng 125(4):468–478

    Google Scholar 

  • Vuddagiri A, Halder P, Samad A, Chaudhuri A (2016) Flow analysis of airfoil having different cavities on its suction surface. Prog Comput Fluid Dyn Int J 16(2):67–77

    Article  MathSciNet  Google Scholar 

  • Yen J, Ahmed NA (2012) Parametric study of dynamic stall flow field with synthetic jet actuation. J Fluids Eng. 134(7):071106–071106-8

  • Yen J, Ahmed NA (2013) Enhancing vertical axis wind turbine by dynamic stall control using synthetic jets. J Wind Eng Ind Aerodyn 114:12–17

    Article  Google Scholar 

Download references

Acknowledgements

This work was supported by the Brain Pool Program through the National Research Foundation of Korea (NRF-2019H1D3A2A01061428), which is funded by Korean government (MSIT). Partial support was also obtained from the National Research Foundation of Korea (NRF) grant, which is funded by the Korean government (MSIT) (No. 2011-0030013, No. 2018R1A2B2007117).

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Correspondence to Mahdi Nili-Ahmadabadi or Kyung Chun Kim.

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Nili-Ahmadabadi, M., Nematollahi, O., Fatehi, M. et al. Evaluation of aerodynamic performance enhancement of Risø_B1 airfoil with an optimized cavity by PIV measurement. J Vis 23, 591–603 (2020). https://doi.org/10.1007/s12650-020-00658-7

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