Wind and Structures

  • 제34권1호
  • /
  • Pages.81-90
  • /
  • 2022
  • /
  • 1226-6116(pISSN)
  • /
  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Spatial correlation of aerodynamic forces on 5:1 rectangular cylinder in different VIV stages

  • Lei, Yongfu (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Sun, Yanguo (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Zhang, Tianyi (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Yang, Xiongwei (Research Center for Wind Engineering, Southwest Jiaotong University) ;
  • Li, Mingshui (Research Center for Wind Engineering, Southwest Jiaotong University)
  • 투고 : 2021.04.08
  • 심사 : 2021.07.09
  • 발행 : 2022.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

To better understand the vortex-induced vibration (VIV) characteristics of a 5:1 rectangular cylinder, the distribution of aerodynamic force and the non-dimensional power spectral density (PSD) of fluctuating pressure on the side surface were studied in different VIV development stages, and their differences in the stationary state and vibration stages were analyzed. The spanwise and streamwise correlations of surface pressures were studied, and the flow field structure partitions on the side surface were defined based on the streamwise correlation analysis. The results show that the variation tendencies of mean and root mean square (RMS) pressure coefficients are similar in different VIV development stages. The RMS values during amplitude growth are larger than those at peak amplitude, and the smallest RMS values are observed in the stationary state. The spanwise correlation coefficients of aerodynamic lifts increase with increase of the peak amplitude. However, for the lock-in region, the maximum spanwise correlation coefficient for aerodynamic lifts occurs in the VIV rising stage rather than in the peak amplitude stage, probably due to the interaction of vortex shedding force (VSF) and self-excited force (SEF). The streamwise correlation results show that the demarcation point positions between the recirculation region and the main vortex region remain almost constant in different VIV development stages, and the reattachment points gradually move to the tailing edge with increasing amplitude. This study provides a reference to estimate the demarcation point and reattachment point positions through streamwise correlation and phase angle analysis from wind tunnel tests.

키워드

과제정보

The research described in this paper was financially supported by the Sichuan Science and Technology Program (2020YJ0306) and National Natural Science Foundation (Nos. 51408505 and 51878580).

참고문헌

  1. 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.
  2. 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.
  3. Eurocode I. (2010), Actions on Structures Part1-4: General actions. Wind Actions, The European Standard EN, Brussels, Belgium.
  4. Goswami, I., Scanlan, R.H. and Jones, N.P. (1992), "Vortex shedding from circular cylinders: Experimental data and a new model", J. Wind Eng. Ind. Aerod., 41-44, 763-774. https://doi.org/10.1016/0167-6105(92)90495-V.
  5. Berger, E. and Wille, R. (1972), "Periodic flow phenomenon", Annu. Rev. Fluid Mech., 4(1), 313-340. https://doi.org/10.1146/annurev.fl.04.010172.001525.
  6. Li, M., Li, Q.S. and Shi, H.Y. (2020), "Aerodynamic pressures on a 5:1 rectangular cylinder in sinusoidal streamwise oscillatory flows with non-zero mean velocities", J. Wind Eng. Ind. Aerod., 208, 104440. https://doi.org/10.1016/j.jweia.2020.104440.
  7. Li, M.S., Li, S.P., Liao, H.L., Zeng, J.D. and Wang, Q. (2016), "Spanwise correlation of aerodynamic forces on oscillating rectangular cylinder", J. Wind Eng. Ind. Aerod., 154, 47-57. https://doi.org/10.1016/j.jweia.2016.04.003.
  8. Liu, X.B., Yan, C. and Liu, Q. (2013). "Wind tunnel study on spanwise correlation of aerodynamic forces on a 5:1 rectangular cylinder", Proceeding of the Eighth Asia-Pacific Conference on Wind Engineering. Chennai, India, December.
  9. Ma, C.M. (2007), 3D aerodynamic admittances of streamlined box bridge decks, Ph.D. Dissertation, Southwest Jiaotong University, Chengdu.
  10. Mannini, C., Marra, A.M., Pigolotti, L. and Bartoli, G. (2017), "The effects of free-stream 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.
  11. Mannini, C., Soda, A. and Schewe, G. (2010), "Unsteady RANS modelling of flow past a rectangular cylinder: Investigation of Reynolds number effects", Comput. Fluids, 39(9), 1609-1624. https://doi.org/10.1016/j.compfluid.2010.05.014.
  12. Mannini, C., Soda, A. and Schewe, G. (2011), "Numerical investigation on the three-dimensional unsteady flow past a 5:1 rectangular cylinder", J. Wind Eng. Ind. Aerod., 99(4), 469-482. https://doi.org/10.1016/j.jweia.2010.12.016.
  13. Matsumoto, M., Shirato, H., Araki, K., Haramura, T. and Hashimoto, T. (2003), "Spanwise coherence characteristics of surface pressure field on 2-D bluff bodies", J. Wind Eng. Ind. Aerod., 91(1-2), 155-163. https://doi.org/10.1016/S0167-6105(02)00342-2.
  14. Nakamura, Y. and Nakashima, M. (1986), "Vortex excitation of prisms with elongated rectangular, H and h cross-sections", J. Fluid Mech., 163, 149-169. https://doi.org/10.1017/S0022112086002252.
  15. Nakamura, Y., Ohya, Y., Ozono, S. and Nakayama, R. (1996), "Experimental and numerical analysis of vortex shedding from elongated rectangular cylinders at low Reynolds numbers 200-103", J. Wind Eng. Ind. Aerod., 65(1), 301-308. https://doi.org/10.1016/S0167-6105(97)00048-2.
  16. Nguyen, D.T., Hargreaves, D.M. and Owen, J.S. (2018), "Vortexinduced vibration of a 5:1 rectangular cylinder: A comparison of wind tunnel sectional model tests and computational simulations", J. Wind Eng. Ind. Aerod., 175, 1-16. https://doi.org/10.1016/j.jweia.2018.01.029.
  17. Parker, R. and Welsh, M.C. (1983), "Effects of sound on flow separation from blunt flat plates", Int. J. Heat Fluid Flow, 4(2), 113-127. https://doi.org/10.1016/0142-727X(83)90014-0.
  18. Ricciardelli, F. (2010), "Effects of the vibration regime on the spanwise correlation of the aerodynamic forces on a 5:1 rectangular cylinder", J. Wind Eng. Ind. Aerod., 98(4-5), 215-225. https://doi.org/10.1016/j.jweia.2009.10.017.
  19. Ricciardelli, F. and Marra, A.M. (2008). "Sectional aerodynamic forces and their longitudinal correlation on a vibrating 5:1 rectangular cylinder", Proceedings of the 6th International Colloquium on Bluff Body Aerodynamics and Applications, Milan, Italy, July.
  20. Scanlan, R.H. (1981), State-of-the-Art Method for Calculating Flutter, Vortex-Induced, and Buffeting Response of Bridge Structures, Report Numbers: FHWA-RD-80- 50 Final Rpt., FCP 35A1-102, Federal Highway Administration, Washington, U.S.A.
  21. Stokes, A.N. and Welsh, M.C. (1986), "Flow-resonant sound interaction in a duct containing a plate, II: Square leading edge", J. Sound Vib., 104(1), 55-73. https://doi.org/10.1016/S0022-460X(86)80131-6.
  22. Sun, Y.G., Li, M., Li, M. and Liao, H.L. (2019), "Spanwise correlation of vortex-induced forces on typical bluff bodies", J. Wind Eng. Ind. Aerod., 189, 186-197. https://doi.org/10.1016/j.jweia.2019.03.020.
  23. Shu, Z.R. and Li, Q.S. (2017), "An experimental investigation of surface pressures in separated and reattaching flows: effects of freestream turbulence and leading edge geometry", J. Wind Eng. Ind. Aerod., 165, 58-66. https://doi.org/10.1016/j.jweia.2017.03.004.
  24. Taylor, Z.J., Gurka, R. and Kopp, G.A. (2014), "Effects of leading edge geometry on the vortex shedding frequency of an elongated bluff body at high Reynolds numbers", J. Wind Eng. Ind. Aerod., 128, 66-75. https://doi.org/10.1016/j.jweia.2014.03.007.
  25. Williamson, C.H.K. (1988), "The existence of two stages in the transition to three dimensionality of a cylinder wake", Phys. Fluids, 31(11), 4. https://doi.org/10.1063/1.866925.
  26. Wu, B., Li, S., Li, K. and Zhang, L. (2020a), "Numerical and experimental studies on the aerodynamics of a 5:1 rectangular cylinder at angles of attack", J. Wind Eng. Ind. Aerod., 199, 104097. https://doi.org/10.1016/j.jweia.2020.104097.
  27. Wu, B., Li, S.P., Cao, S.Y., Yang, Q.S. and Zhang, L.L. (2020b), "Numerical investigation of the separated and reattaching flow over a 5:1 rectangular cylinder in streamwise sinusoidal flow", J. Wind Eng. Ind. Aerod., 198, 104120. https://doi.org/10.1016/j.jweia.2020.104120.