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The influence of internal ring beams on the internal pressure for large cooling towers with wind-thermal coupling effect

  • Ke, Shitang (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Yu, Wei (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Ge, Yaojun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Zhao, in (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Cao, Shuyang (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2018.09.08
  • 심사 : 2018.11.07
  • 발행 : 2019.01.25

초록

Internal ring beams are primary components of new ring-stiffened cooling towers. In this study, numerical simulation of the internal flow field of a cooling tower with three ring beams under wind-thermal coupling effect is performed. The studied cooling tower is a 220-m super-large hyperbolic indirect natural draft cooling tower that is under construction in China and will be the World's highest cooling tower, the influence of peripheral radiators in operating cooling tower is also considered. Based on the simulation, the three-dimensional effect and distribution pattern of the wind loads on inner surface of the cooling tower is summarized, the average wind pressure distributions on the inner surface before and after the addition of the ring beams are analyzed, and the influence pattern of ring beams on the internal pressure coefficient value is derived. The action mechanisms behind the air flows inside the tower are compared. In addition, the effects of internal ring beams on temperature field characteristics, turbulence kinetic energy distribution, and wind resistance are analyzed. Finally, the internal pressure coefficients are suggested for ring-stiffened cooling towers under wind-thermal coupling effect. The study shows that the influence of internal stiffening ring beams on the internal pressure and flow of cooling towers should not be ignored, and the wind-thermal coupling effect should also be considered in the numerical simulation of cooling tower flow fields. The primary conclusions presented in this paper offer references for determining the internal suction of such ring-stiffened cooling towers.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation, Jiangsu Province Outstanding Natural Science Foundation, Postdoctoral Science Foundation

참고문헌

  1. Babu, G.R. Rajan, S.S., Harikrishna, P. et al. (2013), "Experimental Determination of Wind-Induced Response on a Model of Natural Draught Cooling Tower", Exp. Techniques, 37(1), 35-46. https://doi.org/10.1111/j.1747-1567.2011.00715.x
  2. Burger, A.A.S. (2014), "Numerical analysis of flow around infinite and finite cylinders at trans-critical Reynolds numbers with and without surface roughness", University of Sussex, 40(4), 219-242.
  3. Cheng, X.X., Zhao, L., Ge, Y.J. et al. (2015), "Wind pressures on a large cooling tower", Adv. Struct. Eng., 18(2), 201-220. https://doi.org/10.1260/1369-4332.18.2.201
  4. Dong, G.C., Zhang, J.R., Cai, C.S. et al. (2015), "Numerical simulation of internal surface pressure coefficient of super-large cooling tower under operating conditions", J. Hunan Univerisity (Naturnal Science), 42(1), 17-23. (In Chinese)
  5. Dong, G.C., Zhang, J.R., Cai, C.S. et al. (2016), "Study of internal surface pressure coefficient of super-large cooling tower with different internal main components", Eng. Mech., 33(4), 77-83. (In Chinese)
  6. Du, X.P., Yin, Y., Zeng, M. et al. (2014), "An experimental investigation on air-side performances of finned tube heat exchangers for indirect air-cooling tower", Therm. Science, 18(3), 863-874. https://doi.org/10.2298/TSCI1403863D
  7. GB 50009-2012 (2012), Load code for the design of building structures, The Ministry of Construction of China, Beijing, China, 35-36. (In Chinese)
  8. GB/T 50102-2014 (2014), Code for design of cooling for industrial recirculating water, The Ministry of Construction of China, Beijing, China, 24-25 (In Chinese)
  9. Goudarzi, M.A. and Sabbagh-Yazdi, S.R. (2011), "Effects of modeling strategy on computational wind pressure distribution around the cooling tower's", Wind Struct., 14(1), 81-84. https://doi.org/10.12989/was.2011.14.1.081
  10. Gu, H., Wang, H., Gu, Y. et al. (2016), "A numerical study on the mechanism and optimization of wind-break structures for indirect air-cooling towers", Energ. Convers. Manage., 108, 43-49. https://doi.org/10.1016/j.enconman.2015.11.006
  11. JGJ/T 338-2014 (2014), Standard for wind tunnel test of buildings and structures, The Ministry of Construction of China, Beijing, China, 16-17. (In Chinese)
  12. 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(1-3), 67-75. https://doi.org/10.1016/0167-6105(88)90072-4
  13. 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
  14. Ke, S.T., Ge, Y.J. and Zhao, L. (2015), "Wind-induced vibration characteristics and parametric analysis of large hyperbolic cooling towers with different feature sizes", Struct. Eng. Mech., 54(5), 891-908. https://doi.org/10.12989/sem.2015.54.5.891
  15. Ke, S.T., Liang, J., Zhao, L. et al. (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. https://doi.org/10.12989/was.2015.20.3.449
  16. Ke, S.T., Yu, W., Zhu, P. et al. (2018), "Full-scale measurements and damping ratio properties of cooling towers with typical heights and configurations", Thin-Wall. Struct., 124, 437-448. https://doi.org/10.1016/j.tws.2017.12.024
  17. Li, P.F., Zhao, L., Ge, Y.J. et al. (2014), "Wind tunnel investigation on wind load characteristics for super large cooling towers", Eng. Mech., 25(6), 60-67. (In Chinese)
  18. Li, X., Gurgenci, H., Guan, Z. et al. (2017), "Measurements of crosswind influence on a natural draft dry cooling tower for a solar thermal power plant" , Appl. Energ., 206, 1169-1183. https://doi.org/10.1016/j.apenergy.2017.10.038
  19. Sabouri-Ghomi, S., Kharrazi, M.H.K. and Javidan, P. (2006), "Effect of stiffening rings on buckling stability of R.C. hyperbolic cooling towers", Thin-Wall. Struct., 44(2), 152-158. https://doi.org/10.1016/j.tws.2006.02.005
  20. Shen, G.H., Yu, G.P., Sun, B.N. et al. (2011), "Analysis of wind load on large hyperbolic cooling tower considering interaction between internal and external pressure", Acta Areodynam. Sinica, 29(4), 439-446. (In Chinese)
  21. Shen, G.H., Zhang, C.S., Sun, B.N. et al. (2011), "Numerical simulation of wind load on inner surface of large hyperbolic cooling tower", J. Harbin Institute of Technology, 43(4), 104-108. (In Chinese)
  22. Sollenbercer, N.J. and Billington, D.P. (1980), "Wind loading and response of cooling tower", J. Struct. Div. - ASCE, 106(3), 601-621. https://doi.org/10.1061/JSDEAG.0005383
  23. Sun, T.F. and Zhou, L.M. (1983), "Wind pressure distribution around a ribless hyperbolic cooling tower", J. Wind Eng. Ind. Aerod., 14(1), 181-192. https://doi.org/10.1016/0167-6105(83)90021-1
  24. VGB-R610Ue (2005), VGB-Guideline: Structural design of cooling tower-technical guideline for the structural design, computation and execution of cooling tower, Essen: BTR Bautechnik Bei Kuhlturmen.
  25. Widodo, T. and Riyadi, B. (2014), "A parametric study of wind catcher model in a typical system of evaporative cooling tower using CFD", Appl. Mech. Mater., 660, 659-663. https://doi.org/10.4028/www.scientific.net/AMM.660.659
  26. Wittek, U. and Grote, K. (2015), "Substitute wind concept for elastic stability of cooling tower shells", Mater. Member Behavior, 500-513.
  27. Zhang, J.F., Chen, H., Ge, Y.J. et al. (2014), "Effects of stiffening rings on the dynamic properties of hyperboloidal cooling towers", Struct. Eng. Mech., 49(5), 619-629. https://doi.org/10.12989/sem.2014.49.5.619
  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., Chen, X., Ke, S.T. and Ge, Y.J. (2014), "Aerodynamic and aero-elastic performances of super-large cooling towers", Wind Struct., 19(4), 443-465. https://doi.org/10.12989/was.2014.19.4.443
  30. Zou, Y.F., He, X.H., Chen, Z.Q. et al. (2015), "Wind tunnel test and numerical simulation study on internal wind loading for super large cooling tower", Acta Areodynam. Sinica, 33(5), 697-705. (In Chinese)
  31. Zou, Y.F., He, X.H., Tan, L.X. et al. (2015), "Three-dimensional effect and design value of inter surface wind loading for single super-large cooling tower", J. Hunan University (Natural Sciences), 42(1), 24-30. (In Chinese)