Aerodynamic and Aeroacoustic Performance of a Wing with Structured Surface Inspired by Owl’s Wings

Document Type : Regular Article

Authors

1 Department of Mechanical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran

3 Khayyam Research Institute, Ministry of Science, Research and Technology, Tehran, Iran

4 Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY, United States

10.47176/jafm.15.04.33091

Abstract

With the advent of various advanced materials, the idea of flying like birds has attracted considerable attention in recent years. In addition, aeroacoustics has become an important issue and is being widely studied. In this work, based on the shape of Owls’ wings, an attempt was made to improve the aeroacoustic and aerodynamic performances of conventional aircraft wings. For this purpose, wings with different elements, namely, square, triangular, and semicircular, on their top surface were examined. In addition, three different spatial distributions of the elements according to the Owl’s wings shape were considered. For incompressible airflow, aerodynamic and aeroacoustic parameters of wing with structured surfaces were investigated. Also, a wing with serrations was examined. The results indicate that wings with elements distributed starting from maximum section thickness and continuing up to the trailing edge are the most suitable case for both aerodynamic and aeroacoustic improvements. On the other hand, a two-sided serrated wing and a serrated wing in the trailing edge reduce the sound level significantly. In addition, the use of both elements and serrations delays wing stall and thus markedly increases the maximum lift coefficient.

Keywords


Daochun, K.Z., L.J. Xiang and C. Cheng (2020). Chinese Journal of Aeronautics 33(2), 493-500.##
Dimino, I., L. Lecce and D. R, Pecora (2017). Morphing Wing Technologies: Large Commercial Aircraft and Civil Helicopters Butterworth-Heinemann, Oxford, United Kingdom.##
Esmaeilpour, M. (2010). Asseeement of B-L, k-Omega, k-epsilon, SST Turbulent Models for External Flow over an Airfoil. M.Sc. Thesis, Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran.##
Genç, M. S., İ. Karasu, H. H. Açıkel, M. T. Akpolat and G. Özkan (2016). Acoustic Control of Flow over NACA2415 Airofoil at Low Reynolds Numbers. Sustainable Aviation 29(6), 375-420.##
Ghods, M. (2001). Theory of Wings and Wind Tunnel Testing of a NACA2415 Airfoil. Ph.D. Dissertation, Aerspace Engineering Department, University of British Columbia, Vancouver, Canada.##
Gurvan, J. M., S. Valentina, D. Johannes, E. D. Carsten, R. Jean-François and B. Marianna (2017). Dynamics of a Hybrid Morphing Wing with Active Open Loop Vibrating Trailing Edge by Time-resolved PIV and Force Measurements.  Journal of Fluids and Structures 74(12), 263-290.##
Ingard, U. (2010). Notes on Acoustics. Jones & Bartlett Massachusetts, USA.##
Jawahar, H. Kamliya. and M. Azarpeyvand (2018). Aerodynamic and Aeroacoustic Performance of Airfoils Fitted with Morphing Trailing-edges. AIAA/CEAS  Aeroacoustics Conference, University of Bristol, Princeton, AIAA/CEAS Aeroacoustics Conference, University of Bristol, Princeton, U.S.A.##
Jawahar, H. K., N. Zang and M. Azarpeyvand (2020a). Aerodynamic and Aeroacoustic Performance of Spanwise Morphed Airfoils. AIAA Aviation Forum 100, 2580.##
Jawahar, H. K., M. Azarpeyvand and C. Ilario (2020b). Aerodynamic and Aeroacoustic Performance of High-lift Airfoil with Serrated Slat Cusp. AIAA Aviation Forum 2554.##
Jaworski, J. W. and N. Peake (2020). Aeroacoustics of Silent Owl Flight. Annual Review of Fluid Mechanics 52, 395-420.##
Joshi, K., C. G. Vazquez, J. L. Kauffman and S. Bhattacharya (2020). Unsteady Maneuvering of a Morphing Wing. AIAA Scitech 185-193.##
Kim, K. J. and G. H. Yoon (2020). Aeroacoustic Topology Optimization of Noise Barrier, Based on Lighthill's Acoustic Analogy. Journal of Sound and Vibration 483, 1-27.##
Kun, C., L. Qingping and L. Genghua (2012). The Sound Suppression Characteristics of Wing Feather of Owl (Bubo Bubo). Journal of Bionic Engineering 9(2), 192-199.##
Lighthill, M. J. (1952). On Sound Generated Aerodynamically I. General Theory. The Royal Society of London. Series A. Mathematical and Physical Sciences 211(1107), 564-587.##
Previtali, F. M., A. F. Arrieta and P. Emadi (2014). Performance of a Three-dimensional Morphing Wing and Comparison with a Conventional Wing. AIAA J 52(10), 883-845.##
Proudman, I. (1952). The Generation of Noise by Isotropic Turbulence. Royal Society of London. Series A. Mathematical and Physical Sciences 214(1116), 119-132.##
Rohit, B., S. S. R. Redy, S. Ghosh and S. Shakil (2021). Computations of Flow Past the Corrugated Sirfoil of Drosophila Melanogaster at Ultra Low Reynolds Number. Journal of Applied Fluid Mechanics 14(2), 417-427.##
Shahzad, A., H. Hamdani and A. Aizaz (2017). Investigation of Corrugated Wing in Unsteady Motion. Journal of Applied Fluid Mechanics 10(3), 833-845.##
Sneed, N., R. Smith, M. Cash and E. Anderson (2007). Smart-material Based Hydraulic Pump System for Actuation of a Morphing Wing. The 48th AIAA/ASME/ASCE/ AHS/ASC Structures, Structural Dynamics, and Materials Conference, University of Hawaii, Hawaii, U.S.A.##
Tsushima, R., M. Tamayama and H. Arizono (2020). Aeroelastic Characteristics of Morphing Wings with Pantographic Substructures. AIAA Scitech 2020, 2189.##
Yazik, M. M. and M. Sultan (2019). Shape Memory Polymer and Its Composites as Morphing Materials. Failure Analysis in Biocomposites, Fibre-Reinforced Composites and Hybrid Composites. Elsevier, 181-198.##
Zaini, H. and N. Ismail (2016). A Review of Morphing Wings. International Conference in Mechanical Engineering Colloquium, School of Mechanical Engineering, University of Liverpool, Liverpool, England.##
Volume 15, Issue 4 - Serial Number 66
July and August 2022
Pages 1243-1253
  • Received: 09 June 2021
  • Revised: 07 March 2022
  • Accepted: 09 March 2022
  • First Publish Date: 01 July 2022