DOI QR코드

DOI QR Code

Characteristics of wind loading on internal surface and its effect on wind-induced responses of a super-large natural-draught cooling tower

  • Zou, Yun-feng (School of Civil Engineering, Central South University) ;
  • Fu, Zheng-yi (School of Civil Engineering, Central South University) ;
  • He, Xu-hui (School of Civil Engineering, Central South University) ;
  • Jing, Hai-quan (School of Civil Engineering, Central South University) ;
  • Li, Ling-yao (School of Civil Engineering, Central South University) ;
  • Niu, Hua-wei (Wind Engineering Research Center, Hunan University) ;
  • Chen, Zheng-qing (Wind Engineering Research Center, Hunan University)
  • 투고 : 2018.08.11
  • 심사 : 2019.04.26
  • 발행 : 2019.10.25

초록

Wind loading is one of important loadings that should be considered in the design of large hyperbolic natural-draught cooling towers. Both external and internal surfaces of cooling tower are under the action of wind loading for cooling circulating water. In the previous studies, the wind loads on the external surface attracted concernedly attention, while the study on the internal surface was relatively ware. In the present study, the wind pressure on the internal surface of a 220 m high cooling tower is measured through wind tunnel testing, and the effect of ventilation rate of the packing layer on internal pressure is a major concern. The characteristics of internal wind pressure distribution and its effect on wind-induced responses calculated by finite element method are investigated. The results indicate that the wind loading on internal surface of the cooling tower behaves remarkable three-dimensional effect, and the pressure coefficient varies along both of height and circumferential directions. The non-uniformity is particularly strong during the construction stage. Analysis results of the effect of internal pressure on wind-induced responses show that the size and distribution characteristics of internal pressure will have some influence on wind-induced response, however, the outer pressure plays a dominant role in the wind-induced response of cooling tower, and the contribution of internal pressure to the response is small.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundations of China, Natural Science Foundations of Hunan Province

참고문헌

  1. Bamu, P.C. and Zingoni, A. (2005), "Damage, deterioration and long-term structural performance of cooling-tower shells: A survey of developments over the past 50 years", J. Eng. Struct., 27, 1794-1800. https://doi.org/10.1016/j.engstruct.2005.04.020.
  2. Bao, K.Y., Shen, G.H. and Sun, B.N. (2009), "Numerical simulation of mean wind load on large hyperbolic cooling tower", Acta Aerod. Sinica, 27(6), 650-655. (in Chinese) https://doi.org/10.3969/j.issn.0258-1825.2009.06.005
  3. C. E. G. B. (1965), "Report of the committee of inquiry into the collapse of cooling towers at Ferrybridge on November 7, 1965", UK: Central Electricity Generating Board. https://trove.nla.gov.au/version/25162701.
  4. Cheng, X.X., Zhao, L., Ge, Y.J., Dong, J. and Demaritino, C. (2017), "A comprehensive high Reynolds number effects simulation method for wind pressures on cooling tower models", Wind Struct., 24(2), 119-144. https://doi.org/10.12989/was.2017.24.2.119.
  5. Diver, M. (1977), "Large cooling towers the present trend", J. Struct.Engineer, 10(55), 130-137.
  6. Hashish, M.G. and Abu-Sitta, S.H. (1974), "Response of hyperbolic cooling towers to turbulent wind", J. Struct. Eng., 100(5), 1037-1051.
  7. Harnach, R. and Niemann, H.J. (1980), "The influence of realistic mean wind loads on the static response and the design of high cooling towers", Eng. Struct., 2, 27-34. https://doi.org/10.1016/0141-0296(80)90026-7.
  8. Kawarabata, Y., Nakae, S. and Harada, M. (1983), "Some aspects of the wind design of cooling towers", J. Wind Eng. Ind. Aerod., 14, 167-180. https://doi.org/10.1016/0167-6105(83)90020-X.
  9. Kasperski, M. and Niemann, H.J. (1988), "On the correlation of dynamic wind loads and structural response of natural-draught cooling towers", J. Wind Eng. Ind. Aerod., 30(2), 67-75. https://doi.org/10.1016/0167-6105(88)90072-4.
  10. Ke, S.T., Ge, Y.J. and Zhao, L. (2012), "A new methodology for analysis of equivalent static wind loads on super-large cooling towers". J. Wind Eng. Ind. Aerod., 111, 30-39. https://doi.org/10.1016/j.jweia.2012.08.001.
  11. Ke, S.T., Liang, J., Zhao, L. and Ge, Y.J. (2015), "Influence of ventilation rate on the aerodynamic interference between two extra-large indirect dry cooling towers by CFD", Wind Struct., 20(3), 449-468. http://dx.doi.org/10.12989/was.2015.20.3.449.
  12. Ke, S.T., Wang, H. and Ge, Y.J. (2017a), "Multi-dimensional extreme aerodynamic load calculation in super-large cooling towers under typical four-tower arrangements", Wind Struct., 25(2), 101-129. http://dx.doi.org/10.12989/was.2017.25.2.101.
  13. Ke, S.T., Wang, H. and Ge, Y.J. (2017b), "A study on the average wind load characteristics and wind-induced responses of a super-large straight-cone steel cooling tower", Wind Struct., 25(5), 91-109. http://dx.doi.org/10.12989/was.2017.25.5.433.
  14. Ke, S.T., Du, L.Y., Ge, Y.J., Yang, Q., Wang, H. and Tamura, Y. (2018a), "A study on the action mechanism of internal pressures in straight-cone steel cooling tower under two-way coupling between wind and rain". Wind Struct., 27(1), 65-74. http://dx.doi.org/10.12989/was.2018.27.1.011.
  15. Ke, S.T, Du, L.Y., Ge, Y.J. and Tamura, Y. (2018b), "Multi-dimensional wind vibration coefficients under suction for ultra-large cooling towers considering ventilation rates of louvers", Struct. Eng. Mech., 66(2), 14-21. https://doi.org/10.12989/sem.2018.66.2.273.
  16. Karakas, A, Ozgan, K. and Daloglu, A.T. (2016), "A consistent FEM-Vlasov model for hyperbolic cooling towers on layered soil under unsymmetrical wind load", Wind Struct., 22(6), 617-633. http://dx.doi.org/10.12989/was.2016.22.6.617.
  17. Li, P.F., Zhao, L. and Ge, Y.J. (2008), "Investigation on wind load characteristics for super large cooling tower in wind tunnel", Eng. Mech., 25(6), 60-67. (in Chinese)
  18. Ministry of construction of the people's Republic of China, GB/T 50102-2003 (2003), "Code for design of cooling for industrial recalculating water". Beijing, China Planning Press.
  19. Nimeann, H.J. and Zerna, W. (1986), "Impact of research on development of large cooling towers", J. Eng. Struct., 8, 74-86. https://doi.org/10.1016/0141-0296(86)90023-4.
  20. People's Republic of China Ministry of Construction, GB50009-2012 (2012), "Load code for the design of building structures", Beijing, China Building Industry Press, (in Chinese)
  21. Sollenberger, N.J. and Billington, D.P. (1980), "Wind loading and response of cooling towers", J. Struct. Div. - ASCE, 103(3), 601-621. https://doi.org/10.1061/JSDEAG.0005383
  22. Scanlan, R.H. and Leonard, J.F. (1982), "Turbulent winds and pressure effects around a rough cylinder at high Reynolds number", J. Wind Eng. Ind. Aerod., 9, 207-236. https://doi.org/10.1016/0167-6105(82)90016-2.
  23. Shen, G.H., Zhang, C.S. and Sun, B.N. (2011a), "Numerical simulation of wind load on inner surface of large hyperbolic cooling tower", J. Harbin Inst. Technol., 43(4), 104-108. (in Chinese)
  24. Shen, G.H., Yu, G.P. and Sun, B.N. (2011b), "Analysis of wind load on large hyperbolic cooling tower considering interaction between internal and external pressure", Acta Aerod. Sinica, 29(4), 339-446. (in Chinese)
  25. Sun, T.F. and Zhou, L.M. (1983), "Wind pressure distribution around a ribless hyperbolic cooling tower", J. Wind Eng. Ind. Aerod., 14(1-3), 181-192. https://doi.org/10.1016/0167-6105(83)90021-1.
  26. Technical Guideline for the Structural Design, Computation and Execution of Cooling Towers (2005), Structural Design of Cooling Towers(VGB-R 610Ue). German.
  27. The people's Republic of China National Development and Reform Commission, NDGJ5-88 (2006), "Technical specification for hydraulic design of thermal power plant". Beijing: China Electric Power Press, (in Chinese).
  28. Zhao, L. and Ge, Y.J. (2010), "Wind loading characteristics of super-large cooling towers", Wind Struct., 13(3), 257-273. https://doi.org/10.12989/was.2010.13.3.257
  29. Zhao, L., Ge, Y.J. and Kareem, A. (2017), "Fluctuating wind pressure distribution around full-scale cooling towers", J. Wind Eng. Ind. Aerod., 165, 34-45. https://doi.org/10.1016/j.jweia.2017.02.016.
  30. Zou, Y.F., He, X.H., Jing, H.Q., Zhou, S., Niu, H.W. and Chen, Z.Q. (2018), "Characteristics of wind-induced displacement of super-large cooling tower based-on continuous medium wind tunnel test", J. Wind Eng. Ind. Aerod., 180, 201-212. https://doi.org/10.1016/j.jweia.2018.08.001.
  31. Zhang, J.F., Ge, Y.J. and Zhao, L. (2013), "Influence of latitude wind pressure distribution on the responses of hyperbolodial cooling tower shell", Wind Struct., 16(6), 579-601. http://dx.doi.org/10.12989/was.2013.16.6.579.
  32. Zhang, J.F., Ge, Y.J., Zhao, L. and Zhu, B. (2017), "Wind induced dynamic responses on hyperbolic cooling tower shells and the equivalent static wind load", J. Wind Eng. Ind. Aerod., 169, 280-289. https://doi.org/10.1016/j.jweia.2017.08.002.