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Acoustic Control of Flow Over NACA 2415 Aerofoil at Low Reynolds Numbers

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Sustainable Aviation

Abstract

Within the concept of this study, first low Reynolds number flow phenomena , including laminar separation bubble (LSB) and stall were explained. Then a literature review on the acoustic flow control was presented in three categories: flow control with constant frequency, flow control with constant amplitude, and flow control with variable frequency and amplitude. Aside from the review part, results of a comprehensive experimental study on the effects of acoustic flow control at low Reynolds numbers were presented. Within the scope of this experimental study, the effects of both parallel and perpendicular acoustic flow control were examined by means of pressure measurements, force measurements, hot-wire anemometry, flow visualization, and particle image velocimetry (PIV). In order to establish a baseline data, all of the measurements were first applied for the no control case. The effects of acoustic control were examined especially on the characteristics of LSB and stall. It was found that the acoustic excitation can be employed to decrease the height and length of LSB leading to increased lift coefficient and decreased drag coefficient. Also, acoustic flow control increased the angle of stall. It was also seen that the effective excitation frequency increases also, but the range of Zaman number (St/Re 0.5) based on effective frequency still is approximately same with increasing Reynolds numbers. Finally, it was shown that the general aerodynamics performance of an aerofoil at low Reynolds numbers can easily be enhanced by employing acoustic flow control, and the parameters of the acoustic flow control can easily be adjusted in order to keep up with the changing conditions of flow.

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References

  • Açıkel HH (2013) Experimental investigation of effect of acoustic forcing to flow over an aerofoil at low reynolds number flows (in Turkish). M.Sc. Thesis, Graduate School of Natural and Applied Sciences, Erciyes University, Kayseri, Turkey

    Google Scholar 

  • Açıkel HH, Genç MS (2015) Flow control with perpendicular acoustic forcing on NACA 2415 aerofoil at low Reynolds numbers. Proc IMechE Part G J Aerosp Eng. doi:10.1177/0954410015625672 (in press)

  • Açıkel HH, Genç MS, Akpolat MT, Karasu I (2012) An experimental study of acoustic disturbances effect on laminar separation bubble and transition on an aerofoil at low Reynolds number. In: AIAA-2012-2684, 6th AIAA flow control conference. New Orleans, Louisiana, USA, 25–28 June 2012

    Google Scholar 

  • Ahuja KK, Burrin RH (1984) Control of flow separation by sound. AIAA paper no. 84-2298, New York

    Google Scholar 

  • Ahuja KK, Whipkey RR, Jones GS (1983) Control of turbulent boundary layer flows by sound. AIAA Paper No. 83-0726, New York

    Google Scholar 

  • Bak C, Madsen HA, Fuglsang P, Rasmussen F (1998) Double stall, riso national laboratory technical report riso-R-1043(EN). Riso National Laboratory, Roskilde, Denmark

    Google Scholar 

  • Burgman S, Brücker C, Shröder W (2006) Scanning PIV measurements of a laminer separation bubble. Exp Fluids 41:319–326

    Article  Google Scholar 

  • Collins FG, Zelenevitz J (1975) Influence of sound upon separated flow over wings. AIAA J 13:408–410

    Article  Google Scholar 

  • Gaster M (1967) The structure and behaviour of separation bubbles. Aeronautical Research Council Reports and Memoranda, No 3595, London

    Google Scholar 

  • Genç MS, Karasu İ, Açıkel HH, Akpolat MT (2012a) Low Reynolds number flows and transition. In: Genç MS (ed) Low Reynolds number aerodynamics and transition. Intech-Sciyo. ISBN 978-953-51-0492-6

    Google Scholar 

  • Genç MS, Karasu İ, Açıkel HH (2012b) An experimental study on aerodynamics of NACA2415 aerofoil at low Re numbers. Exp Thermal Fluid Sci 39:252–264

    Google Scholar 

  • Genç MS, Akpolat MT, Açıkel HH, Karasu I (2012c) An experimental study of perpendicular acoustic disturbances effect on flow over an aerofoil at low Reynolds numbers. In: ASME 2012 ınternational mechanical engineering congress & exposition IMECE2012. Houston, Texas, USA, 9–15 Nov 2012

    Google Scholar 

  • Genç MS, Açıkel HH, Akpolat MT, Özkan G (2015a) Acoustic control of separated flow over NACA2415 aerofoil at low Re numbers. In: International symposium on sustainable aviation. Istanbul, Turkey, May 31–June 3, 2015

    Google Scholar 

  • Genç MS, Açıkel HH, Akpolat MT, Özkan G, Karasu İ (2015b) Acoustic control of flow over NACA2415 aerofoil at low Renolds numbers. J Aerosp Eng ASCE. doi:10.1061/(ASCE)AS.1943-5525.0000639 (in press)

  • Hain R, Kahler C, Radespiel J (2009) Dynamics of laminer separation bubbles at low Reynolds number aerofoils. J Fluid Mech 630:129–153

    Article  MATH  Google Scholar 

  • Karasu I (2011) Experimental and numerical investigations of transition to turbulence and laminar separation bubble over aerofoil at low Reynolds number flows (In Turkish), M.Sc. Thesis, Graduate School of Natural and Applied Sciences, Erciyes University, Kayseri, Turkey

    Google Scholar 

  • Karasu I, Genç MS, Açıkel HH, Akpolat MT (2012) An experimental study on laminar separation bubble and transition on an aerofoil at low Reynolds number, AIAA-2012-3030. In: 30th AIAA applied aerodynamics conference. New Orleans, Louisiana, USA, 25–28 June 2012

    Google Scholar 

  • Karasu I, Genç MS, Açıkel HH (2013) Numerical study on low Reynolds number flows over an Aerofoil. J. Appl. Mech. Eng. 2:131

    Google Scholar 

  • Katz J, Plotkin A (1991) Low-speed aerodynamics from wing theory to panel methods. McGraw-Hill, Inc.

    Google Scholar 

  • Lang M, Rist U, Wagner S (2004) Investigations on controlled transition development in a laminar separation bubble by means of LDA and PIV. Exp Fluids 36:43–52

    Article  Google Scholar 

  • Langtry R, Menter F (2006) Overview of industrial transition modelling in CFX. ANSYS Germany GmbH, ANSYS CFX

    Google Scholar 

  • Lock GD (2007) Lecture notes: thermofluids 4-fluid mechanics with historical perspective. University of Bath, UK

    Google Scholar 

  • Mayle RE (1991) The role of laminar-turbulent transition in gas turbine engines. J Turbomach 113:509–537

    Article  Google Scholar 

  • McCullough GB, Gault DE (1951) Examples of three representative types of airfoil-section stall at low speed. NACA technical note 2502, AMES Aeronautical Laboratory Moffet Field. California, USA

    Google Scholar 

  • Mohsen J (2011) Laminar separation bubble: ıts structure, dynamics and control. Chalmers University of Technology. Research Report 2011:06

    Google Scholar 

  • Nakano T, Fujisawa N, Oguma Y, Takagi Y, Lee S (2007) Experimental study on flow and noise characteristics of NACA0018 airfoil. J Wind Eng Ind Aerodyn 95:511–531

    Article  Google Scholar 

  • Nishioka M, Asai M, Yoshida S (1990) Control of flow separation by acoustic excitation. AIAA J 28:1909–1915

    Article  Google Scholar 

  • Ol MV, McAuliffe BR, Hanff ES, Scholz U, Kahler C (2005) Comparison of laminar separation bubble measurements on a low Reynolds number airfoil in three facilities. In: 35th AIAA fluid dynamics conference and exhibit

    Google Scholar 

  • Ricci R, Montelpare SA (2005) Quantative IR thermographic method to study the laminar separation bubble phenomenon. Int J Therm Sci 44:709–719

    Article  Google Scholar 

  • Ricci R, Montelpare S, Silvi E (2007) Study of acoustic disturbances effect on laminar separation bubble by IR thermography. Exp Thermal Fluid Sci 31:349–359

    Article  Google Scholar 

  • Swift KM (2009) An experimental analysis of the laminar separation bubble at low Reynolds numbers. University of Tennesee Space Institute, Ms.c. Thesis

    Google Scholar 

  • Tan ACN, Auld JD (1992) Study of laminar separation bubbles at low Reynolds number under various conditions. In: 11th Australasian fluids mechanics conference. Universiy of Tasmania, Hobart, Australia

    Google Scholar 

  • Tani I (1964) Low speed flows involving bubble separations. Prog Aerosp Sci 5:70–103

    Article  Google Scholar 

  • Yang Z, Haan LF, Hui H (2007) An experimental investigation on the flow separation on a low-Reynolds number airfoil. In: 45th AIAA aerospace sciences meeting and exhibit. Reno Nevada

    Google Scholar 

  • Yarusevych S, Kawall JG, Sullivan PE (2003) Effect of acoustic excitation on airfoil performance at low Reynolds numbers. AIAA J 41(8):1599–1601

    Article  Google Scholar 

  • Yarusevych S, Kawall JG, Sullivan PE (2007) Separated shear layer transition at low Reynolds numbers: experiments and stability analysis. In: 37th AIAA fluid dynamics conference and exhibit. Miami, Florida, USA, 25–28 June

    Google Scholar 

  • Yarusevych S, Sullivan PE, Kawall JG (2007b) Effect of acoustic excitation amplitude on airfoil boundary layer and wake development. AIAA J 45(4):760–771

    Article  Google Scholar 

  • Zaman KBMQ (1992) Acoustic excitation on stalled flows. AIAA Journal 30:1492–1498

    Article  Google Scholar 

  • Zaman KBMQ, McKinzie DJ (1991) Control of laminar separation over airfoils by acoustic excitation. AIAA Journal 29:1075–1083

    Article  Google Scholar 

  • Zhang W, Hain R, Kahler CJ (2008) Scanning PIV investigation of the laminar separation bubble on a SD7003 airfoil. Exp Fluids 45:725–743

    Article  Google Scholar 

Download references

Acknowledgments

The authors would like to acknowledge funding from the Scientific and Technological Research Council of Turkey (TÜBİTAK) under the project no: 110M068, the Scientific Research Projects Unit of Erciyes University under the contract no: FBA-08-574, FBA-10-3355, FBY-10-3369, FBY-11-3516, FBY-11-3813 and DIP-12-4068. The authors would also like to thank personally Assoc. Prof. Dr. Selçuk ERKAYA from Department of Mechatronics Engineering in Erciyes University for helping to measure the wind tunnel resonance characteristics by microphone.

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Authors and Affiliations

  1. Wind Engineering and Aerodynamics Research (WEAR) Laboratory, Department of Energy Systems Engineering, Erciyes University, 38039, Kayseri, Turkey

    M. Serdar Genç, H. Hakan Açıkel & Gökhan Özkan

  2. Department of Aircraft and Aerospace Engineering, Gaziantep University, 27310, Gaziantep, Turkey

    İlyas Karasu

  3. Department of Airframe and Powerplant, Civil Aviation School, Atilim University, 06836, Ankara, Turkey

    M. Tuğrul Akpolat

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  1. M. Serdar Genç
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  2. İlyas Karasu
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  3. H. Hakan Açıkel
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  4. M. Tuğrul Akpolat
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  5. Gökhan Özkan
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Correspondence to M. Serdar Genç .

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Editors and Affiliations

  1. Anadolu Univeristy, Tepebaşı, Turkey

    T. Hikmet Karakoc

  2. Bahçeşehir University, Beşiktaş/İstanbul, Turkey

    M. Baris Ozerdem

  3. Anadolu Univeristy, Tepebaşı, Turkey

    M. Ziya Sogut

  4. Dokuz Eylul University, Alsancak, Izmir, Turkey

    Can Ozgur Colpan

  5. FACULTY OF AERONAUTICS AND ASTRONAU, Anadolu Univeristy, Tepebaşı, Turkey

    Onder Altuntas

  6. Bilecik S.E. University, Gulumbe, Bilecik, Turkey

    Emin Açıkkalp

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Genç, M.S., Karasu, İ., Açıkel, H.H., Akpolat, M.T., Özkan, G. (2016). Acoustic Control of Flow Over NACA 2415 Aerofoil at Low Reynolds Numbers. In: Karakoc, T., Ozerdem, M., Sogut, M., Colpan, C., Altuntas, O., Açıkkalp, E. (eds) Sustainable Aviation. Springer, Cham. https://doi.org/10.1007/978-3-319-34181-1_31

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  • DOI: https://doi.org/10.1007/978-3-319-34181-1_31

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  • Print ISBN: 978-3-319-34179-8

  • Online ISBN: 978-3-319-34181-1

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