Wind and Structures

  • 제25권3호
  • /
  • Pages.301-328
  • /
  • 2017
  • /
  • 1226-6116(pISSN)
  • /
  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Wind tunnel investigations on aerodynamics of a 2:1 rectangular section for various angles of wind incidence

  • Keerthana, M. (SIR-Structural Engineering Research Centre, CSIR Madras Campus) ;
  • Harikrishna, P. (SIR-Structural Engineering Research Centre, CSIR Madras Campus)
  • 투고 : 2017.02.27
  • 심사 : 2017.08.07
  • 발행 : 2017.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

Multivariate fluctuating pressures acting on a 2:1 rectangular section (2-D) with dimensions of 9 cm by 4.5 cm has been studied using wind tunnel experiments under uniform and smooth flow condition for various angles of wind incidence. Based on the variation of mean pressure coefficient distributions along the circumference of the rectangular section with angle of wind incidence, and with the aid of skin friction coefficients, three distinct flow regimes with two transition regimes have been identified. Further, variations of mean drag and lift coefficients, Strouhal number with angles of wind incidence have been studied. The applicability of Universal Strouhal number based on vortex street similarity of wakes in bluff bodies to the 2:1 rectangular section has been studied for different angles of wind incidence. The spatio-temporal correlation features of the measured pressure data have been studied using Proper Orthogonal Decomposition (POD) technique. The contribution of individual POD modes to the aerodynamic force components, viz, drag and lift, have been studied. It has been demonstrated that individual POD modes can be associated to different physical phenomena, which contribute to the overall aerodynamic forces.

키워드

참고문헌

  1. Ahlborn, B., Setob, M.L. and Noack, B.R. (2002), "On drag, strouhal number and vortex-street structure", Fluid Dyn Res., 30(6), 379-399. https://doi.org/10.1016/S0169-5983(02)00062-X
  2. Amrouche, N., Dizene, R. and Laneville, A. (2010), "Observations of the wind tunnel blockage effects on the mean pressure distributions around rectangular prisms in smooth and grid turbulent flows", Revue des Energies Renouvelables SMEE'10, Algeria, 21-26.
  3. Awbi, H.B. (1978), "Wind-tunnel-wall constraint on two-dimensional rectangular-section prisms", J. Wind. Eng. Ind. Aerod., 3(4), 285-306. https://doi.org/10.1016/0167-6105(78)90034-X
  4. Bartoli, G., Bruno, L., Buresti, G., Ricciardelli, F., Salvetti, M.V. and Zasso, A. (2009), "BARC: a benchmark on the aerodynamics of a rectangular 5:1 cylinder", Proceedings of the 5th European African Conference on Wind Engineering, Italy, July.
  5. Bruno, L., Fransos, D., Coste, N. and Bosco, A. (2010), "3D flow around a rectangular cylinder: A computational study", J. Wind. Eng. Ind. Aerod., 98 (6-7), 263-276. https://doi.org/10.1016/j.jweia.2009.10.005
  6. Bruno, L., Salvetti, M.V. and Ricciardelli, F. (2014), "Benchmark on the aerodynamics of a rectangular 5:1 cylinder: An overview after the first four years of activity", J. Wind. Eng. Ind. Aerod., 126, 87-106. https://doi.org/10.1016/j.jweia.2014.01.005
  7. Carassale, L. (2012), "Analysis of aerodynamic pressure measurements by dynamic coherent structures", Probabilist. Eng. Mech., 28, 66-74. https://doi.org/10.1016/j.probengmech.2011.08.010
  8. Carassale, L., Solari, G. and Tubino, F. (2007), "Proper orthogonal decomposition in wind engineering: part 2: theoretical aspects and some applications", Wind Struct., 10(2), 177-208. https://doi.org/10.12989/was.2007.10.2.177
  9. Cebeci, T., Mosinskis, G.J. and Smith, A.M. O. (1972), "Calculation of separation points in incompressible turbulent flows", J. Aircraft., 9(9), 618-624. https://doi.org/10.2514/3.59049
  10. Csiba, A.L. and Martinuzzi, R.J. (2008), "Investigation of bluff body asymmetry on the properties of vortex shedding", J. Wind. Eng. Ind. Aerod., 96, 1152-1163. https://doi.org/10.1016/j.jweia.2007.06.037
  11. de Grenet, E. T. and Ricciardelli, F. (2004), "Analysis of the wind loading of square cylinders using covariance proper transformation", Wind Struct., 7(2), 71-88. https://doi.org/10.12989/was.2004.7.2.071
  12. Dutta, S., Muralidhar, K. and Panigrahi, P. (2003), "Influence of the orientation of a square cylinder on the wake properties", Exp. Fluids., 34(1), 16-23. https://doi.org/10.1007/s00348-002-0484-x
  13. Gao, G. and Zhu, L. (2016), "Measurement and verification of unsteady galloping force on a rectangular 2:1 cylinder", J. Wind. Eng. Ind. Aerod., 157, 76-94. https://doi.org/10.1016/j.jweia.2016.08.004
  14. Griffin, O.M. (1981), "Universal similarity in the wakes of stationary and vibrating bluff structures", T. Am. Soc. Mech. Eng., 103, 52-58.
  15. Hemon, P. and Santi, F. (2002), "On the aeroelastic behavior of rectangular cylinders in cross-flow", J. Fluid. Struct., 16(7), 855-889. https://doi.org/10.1006/jfls.2002.0452
  16. Hemon, P., Santi, F., Schnoerringer, B. and Wojciechowski, J. (2001), "Influence of free-stream turbulence on the movement-induced vibrations of an elongated rectangular cylinder in cross-flow", J. Wind. Eng. Ind. Aerod., 89, 1383-1395. https://doi.org/10.1016/S0167-6105(01)00126-X
  17. Hirano, H., Maruoka, A. and Watanabe, S. (2002), "Calculation of aerodynamic properties of rectangular cylinder with slenderness ratio of 2:1 under various angles of wind incidence", J. Struct. Eng., 48, 971-978.
  18. Hoa, L. T., Tamura, Y., Matsumoto, M. and Shirato, H. (2013), "Understanding of unsteady pressure fields on prisms based on covariance and spectral proper orthogonal decompositions", Wind Struct., 16(5), 517-540. https://doi.org/10.12989/was.2013.16.5.517
  19. Keerthana, M. and Harikrishna, P. (2013). "Application of CFD for assessment of galloping stability of rectangular and H sections", J. Sci. Ind. Res. India, 72, 419-427.
  20. Kikuchi, H., Tamura, Y., Ueda, H. and Hibi, K. (1997), "Dynamic wind pressure acting on a tall building model - proper orthogonal decomposition", J. Wind. Eng. Ind. Aerod., 69-71, 631-46. https://doi.org/10.1016/S0167-6105(97)00193-1
  21. Knisely, C. (1990), "Strouhal numbers of rectangular cylinders at incidence: A review and new data", J Fluid. Struct, 4 (4), 371-393. https://doi.org/10.1016/0889-9746(90)90137-T
  22. Larose, G.L. and D'Auteuil, A. (2006), "On the Reynolds number sensitivity of the aerodynamics of bluff bodies with sharp edges", J. Wind. Eng. Ind. Aerod., 94, 365-376. https://doi.org/10.1016/j.jweia.2006.01.011
  23. Larose, G.L. and D'Auteuil, A. (2008), "Experiments on 2D rectangular prisms at high Reynolds numbers in a pressurised wind tunnel", J. Wind. Eng. Ind. Aerod., 96, 923-933. https://doi.org/10.1016/j.jweia.2007.06.018
  24. Lee, B.E. (1975), "The effect of turbulence on the pressure field of a square prism", J. Fluid. Mech., 69, 263-282. https://doi.org/10.1017/S0022112075001437
  25. Li, F., Gu, M., Ni, Z. and Shen, S. (2012), "Wind pressures on structures by proper orthogonal decomposition", J. Civil Eng. Architect., 6(2), 238-243.
  26. Mannini, C., Marra, A.M., Pigolotti, L. and Bartoli, G. (2017), "The effects of turbulence and angle of attack on the aerodynamics of a cylinder with rectangular 5:1 cross-section", J. Wind. Eng. Ind. Aerod., 161, 42-58. https://doi.org/10.1016/j.jweia.2016.12.001
  27. Matsumoto, M., Ishizaki, H., Matsuoka, C., Daito, Y., Ichikawa, Y. and Shimahara, A. (1998), "Aerodynamic effects of the angle of wind incidence on a rectangular prism", J. Wind. Eng. Ind. Aerod., 77-78, 531-542. https://doi.org/10.1016/S0167-6105(98)00170-6
  28. McClean, J.F. and Sumner, D. (2014), "An experimental investigation of aspect ratio and incidence angle effects for the flow around surface-mounted finite-height square prisms", J. Fluid. Eng. -T ASME, 136(8), 081206:1-10.
  29. Noda, H. and Nakayama, A. (2003), "Free-stream turbulence effects on the instantaneous pressure and forces on cylinders of rectangular cross section", Exp Fluids, 34, 332-344. https://doi.org/10.1007/s00348-002-0562-0
  30. Okajima, A. (1982), "Strouhal numbers of rectangular cylinders", J, Fluid, Mech,, 123, 379-398. https://doi.org/10.1017/S0022112082003115
  31. Qiu, Y., Sun, Y., Wu, Y. and Tamura, Y. (2014), "Analyzing the fluctuating pressures acting on a circular cylinder using stochastic decomposition", J, Fluid, Struct,, 50, 512-527. https://doi.org/10.1016/j.jfluidstructs.2014.07.008
  32. Schewe, G. (2009), "Reynolds-Number-Effects in Flow around a rectangular Cylinder with Aspect Ratio 1:5", Proceedings of the 5th European-African Conference on Wind Engineering, Florence, Italy.
  33. Schlichting, H. (1979), Boundary Layer Theory, McGraw-Hill, New York.
  34. Shimada, K. and Ishihara, T. (1999), "Prediction of aeroelastic vibration of rectangular cylinders by k-epsilon model", J. Aerospace Eng., 12(4), 122-135. https://doi.org/10.1061/(ASCE)0893-1321(1999)12:4(122)
  35. Shimada, K. and Ishihara, T. (2002), "Application of modified k-epsilon model to the prediction of aerodynamic characteristics of rectangular cross-sectional cylinders", J. Fluid. Struct., 16(4), 465-485. https://doi.org/10.1006/jfls.2001.0433
  36. Simiu, E. and Scanlan, R. (1996), Wind Effects On Structures, John Wiley & Sons, New York.
  37. Solari, G., Carassale, L. and Tubino, F. (2007), "Proper orthogonal decomposition in wind engineering - Part 1: A state-of-the-art and some prospects", Wind Struct., 10(2), 153-176. https://doi.org/10.12989/was.2007.10.2.153
  38. Tamura, Y., Suganuma, S., Kikuchi, H. and Hibi, K. (1999), "Proper orthogonal decomposition of random wind pressure field", J. Fluid. Struct., 13, 1069-1095. https://doi.org/10.1006/jfls.1999.0242
  39. van Oudheusden, B.W., Scarano, F., van Hinsberg, N.P. and Watt, D.W. (2005), "Phase-resolved characterization of vortex shedding in the near wake of a square-section cylinder at incidence", Exp. Fluids, 39 (1), 86-98. https://doi.org/10.1007/s00348-005-0985-5
  40. Wang, X. and Gu, M. (2015), "Experimental investigation of reynolds number effects on 2D rectangular prisms with various side ratios and rounded corners", Wind Struct., 21(2), 183-202. https://doi.org/10.12989/was.2015.21.2.183
  41. Yeung, W.W.H. (2010). "On the relationships among strouhal number, pressure drag, and separation pressure for blocked bluff-body flow", J. Fluid. Eng. - T ASME, 132(2), 021201:1-10.
  42. Yu, D. and Kareem, A. (1998), "Parametric study of flow around rectangular prisms using LES", J. Wind. Eng. Ind. Aerod., 77-78, 653-662. https://doi.org/10.1016/S0167-6105(98)00180-9
  43. Zhang, Q., Liu, Y. and Wang, S. (2014), "The identification of coherent structures using proper orthogonal decomposition and dynamic mode decomposition", J. Fluid. Struct., 49, 53-72. https://doi.org/10.1016/j.jfluidstructs.2014.04.002

피인용 문헌

  1. Validation of the numerical simulations of flow around a scaled-down turbine using experimental data from wind tunnel vol.29, pp.6, 2017, https://doi.org/10.12989/was.2019.29.6.405
  2. Fluid-structure interaction of a tensile fabric structure subjected to different wind speeds vol.31, pp.6, 2017, https://doi.org/10.12989/was.2020.31.6.533