基于回流多风扇主动控制引导风洞的风场模拟试验
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摘要
为了深入开展复杂建筑物及输配电线路的台风风荷载研究,提升复杂建筑物及输配电线路抗台风灾害的能力,拟研制一种回流多风扇主动控制风洞。为了突破回流多风扇主动控制风洞结构设计的关键技术,验证全尺寸风洞能否达到预期指标,研制了回流单动力段主动控制引导风洞。文中主要介绍了该引导风洞的结构设计和主动来流(均匀流场和湍流流场)模拟试验。试验结果表明:该引导风洞的最大风速达到18.2 m/s;正弦脉动流场风速为15.1 m/s(平均速度)±3.8 m/s(振幅)时,最大频率为7 Hz;正弦脉动风场模拟相似度高达94.3%。
The multiple controlled fan wind tunnel is designed to investigate the typhoon wind load and improve the resistance ability for complex buildings and transmission tower-line systems(TTLS). In order to achieve the key technology during the structure design of the full-scale wind tunnel,a small-scale model of the closed-circuit single controlled fan wind tunnel is established. The uniform and turbulence characteristics of the atmospheric boundary layer(ABL)in the small-scale wind tunnel are discussed. The obtained results show that the value of the maximum average wind speed can reach 18.2 m/s and the maximum circular frequency is 7 Hz. Meanwhile,the mean wind speed of the sinusoidal wave flow is 15.1 m/s at the peak of amplitude of 3.8 m/s. The generated sinusoidal wave flow has a high correlation coefficient at 94.3% with the target.
The multiple controlled fan wind tunnel is designed to investigate the typhoon wind load and improve the resistance ability for complex buildings and transmission tower-line systems(TTLS). In order to achieve the key technology during the structure design of the full-scale wind tunnel,a small-scale model of the closed-circuit single controlled fan wind tunnel is established. The uniform and turbulence characteristics of the atmospheric boundary layer(ABL)in the small-scale wind tunnel are discussed. The obtained results show that the value of the maximum average wind speed can reach 18.2 m/s and the maximum circular frequency is 7 Hz. Meanwhile,the mean wind speed of the sinusoidal wave flow is 15.1 m/s at the peak of amplitude of 3.8 m/s. The generated sinusoidal wave flow has a high correlation coefficient at 94.3% with the target.
引文
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[23]HUI Y,YOSHIDA A,TAMURA Y.Interference effects between two rectangular-section high-rise buildings on local peak pressure coefficients[J].Journal of Fluids&Structures,2013,37(37):120-133.
[24]VARSHNEY K,PODDAR K.Experiments on integral length scale control in atmospheric boundary layer wind tunnel[J].Theoretical&Applied Climatology,2011,106(1/2):127-137.
[25]CAO S Y,TAMURA Y,KIKUCHI N.A case study of gust factor of a strong typhoon[J].Journal of Wind Engineering&Industrial Aerodynamics,2015,138:52-60.
[26]TORRIELLI A,REPETTO M P,SOLARI G.Arefined analysis and simulation of the wind speed macro-meteorological components[J].Journal of Wind Engineering&Industrial Aerodynamics,2014,132(132):54-65.
[2]SONG P Z.Simulation of atmospheric boundary layer in an open-loop wind tunnel using spire roughness element technique[D].Windsor:University of Windsor,2017.
[3]SILL B L.Turbulent boundary layer profiles over uniform rough surfaces[J].Journal of Wind Engineering&Industrial Aerodynamics,1988,31(2):147-163.
[4]CERMAK J E.Progress in physical modeling for wind engineering[J].Journal of Wind Engineering&Industrial Aerodynamics,1995,54/55(94):439-455.
[5]TEUNISSEN H W.Simulation of the planetary boundary layer in a multiple-jet wind tunnel[J].Atmospheric Environment,1972,9(2):145-174.
[6]KAWATANI M,KIM H.Evaluation of aerodynamic admittance for buffeting analysis[J].Journal of Wind Engineering&Industrial Aerodynamics,1992,41(1/2/3):613-624.
[7]NISHI A,KIKUGAWA H,MATSUDA Y,et al.Turbulence control in multiple-fan wind tunnels[J].Journal of Wind Engineering&Industrial Aerodynamics,1997,67/68(4):861-872.
[8]ALY A M,BITSUAMLAK G T,CHOWDHURYA G.Full-scale aerodynamic testing of a loose concrete roof paver system[J].Engineering Structures,2012,44(6):260-270.
[9]SMITH J T,MASTERS F J,LIU Z,et al.Asimplified approach to simulate prescribed boundary layer flow conditions in a multiple controlled fan wind tunnel[J].Journal of Wind Engineering&Industrial Aerodynamics,2012,109(4):79-88.
[10]BUTLER K,CAO S Y,KAREEM A,et al.Surface pressure and wind load characteristics on prisms immersed in a simulated transient gust front flow field[J].Journal of Wind Engineering&Industrial Aerodynamics,2010,98(6/7):299-316.
[11]TOSHIMITSU K,NARIHARA T,KIKUGAWAH,et al.Experimental study of improved HAWTperformance in simulated natural wind by an active controlled multi-fan wind tunnel[J].Journal of Thermal Science,2017,26(2):113-118.
[12]CAO S Y,NISHI A,KIKUGAWA H,et al.Reproduction of wind velocity history in a multiple fan wind tunnel[J].Journal of Wind Engineering&Industrial Aerodynamics,2002,90(12/13/14/15):1719-1729.
[13]MOONEGHI M A,IRWIN P,CHOWDHURY AG.Large-scale testing on wind uplift of roof pavers[J].Journal of Wind Engineering&Industrial Aerodynamics,2014,128(128):22-36.
[14]ALY A M,CHOWDHURY A G,BITSUAMLAKG.Wind profile management and blockage assessment for a new 12-fan wall of wind facility at FIU[J].Wind&Structures An International Journal,2011,14(4):285-300.
[15]BAHERU T,CHOWDHURY A G,BITSUAMLAK G,et al.Simulation of wind-driven rain associated with tropical storms and hurricanes using the 12-fan wall of wind[J].Building&Environment,2014,76(6):18-29.
[16]FU T C,ALY A M,CHOWDHURY A G,et al.Proposed technique for determining aerodynamic pressures on residential homes[J].Wind&Structures An International Journal,2012,15(1):27-41.
[17]MORRISON M J,BROWM T M,LIU Z Z.Comparison of field and full-scale laboratory peak pressures at the IBHS research center[C]//Proceeding of ATC and SEI Conference on Advances in Hurricane Engineering.Miami,Florida:[s.n.],2012.
[18]SMITH J T.Simulation of prescribed boundary flow conditions in a multiple controlled fan wind tunnel[D].Gainesville,Florida:University of Florida,2011.
[19]STANDOHAR A C D,ESTES H,JOHNSTONT,et al.Reducing losses from wind-related natural perils:Research at the IBHS research center[J].Frontiers in Built Environment,2017(3):1-19.
[20]LIU Z Z,SMITH J,MASTERS F J,et al.Assessment of wind storm facility at the insurance center for building safety research[C]//The Seventh Asia-Pacific Conference on Wind Engineering.Taipei,China:[s.n.],2009.
[21]曹曙阳,朱乐东,赵林.TJ-5多风扇主动控制风洞[EB/OL].(2017-04-08)[2018-08-30].http://mp.weixin.qq.com/s/idD-_ryEMW4GNwYMQHjx3Q,2017.CAO Shuyang,ZHU Ledong,ZHAO Lin.The closed-circuit multiple controlled fan wind tunnel TJ-5[EB/OL].(2017-04-08)[2018-08-30].http://mp.weixin.qq.com/s/idD-_ryEMW4GNwYMQHjx3Q,2017.
[22]CAO J X,CAO S Y,GE Y J.Characteristics and performances of a newly-built actively-controlled multiple-fan wind tunnel[C]//The 9th Asia-Pacific Conference on Wind Engineering.Auckland,New Zealand:[s.n.],2017.
[23]HUI Y,YOSHIDA A,TAMURA Y.Interference effects between two rectangular-section high-rise buildings on local peak pressure coefficients[J].Journal of Fluids&Structures,2013,37(37):120-133.
[24]VARSHNEY K,PODDAR K.Experiments on integral length scale control in atmospheric boundary layer wind tunnel[J].Theoretical&Applied Climatology,2011,106(1/2):127-137.
[25]CAO S Y,TAMURA Y,KIKUCHI N.A case study of gust factor of a strong typhoon[J].Journal of Wind Engineering&Industrial Aerodynamics,2015,138:52-60.
[26]TORRIELLI A,REPETTO M P,SOLARI G.Arefined analysis and simulation of the wind speed macro-meteorological components[J].Journal of Wind Engineering&Industrial Aerodynamics,2014,132(132):54-65.