Numerical investigation on the drag reduction properties of a suction controlled high-rise building  

作　　者：Chao-rong ZHENG Yao-chun ZHANG 

机构地区：[1]School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2010年第7期477-487,共11页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 59895410) supported by the National Natural Science Foundation of China

摘　　要：To reduce the wind-induced drag and improve the wind-resistance performance of a high-rise building, steady suction control is introduced into the building structure. Based on validation of the numerical methods by experiment with suction control over the flow separation of a 3D backward-facing step, the Reynolds stress equation model is used to investigate the drag reduction (DR) properties of a high-rise building whose side faces are controlled by all-height suction. Effects of the orifice geometrical parameters and suction flux parameters on the DR and the separation control are analyzed, and the detailed flow fields are shown to clarify the mechanism of suction control. The results indicate that suction control is very effective in reducing the wind loads on the high-rise building model, and only the dimensionless suction flux dominates. Lastly, the power consumed and the counterforce induced by suction are discussed, the suction models become the "zero-drag" model under certain suction angles.To reduce the wind-induced drag and improve the wind-resistance performance of a high-rise building, steady suction control is introduced into the building structure. Based on validation of the numerical methods by experiment with suction control over the flow separation ofa 3D backward-facing step, the Reynolds stress equation model is used to investigate the drag reduction （DR） properties of a high-rise building whose side faces are controlled by all-height suction. Effects of the orifice geometrical parameters and suction flux parameters on the DR and the separation control are analyzed, and the detailed flow fields are shown to clarify the mechanism of suction control. The results indicate that suction control is very effective in reducing the wind loads on the high-rise building model, and only the dimensionless suction flux dominates. Lastly, the power consumed and the counterforce induced by suction are discussed, the suction models become the ＂zero-drag＂ model under certain suction angles.

关 键 词：High-rise building Numerical simulation Suction control Drag reduction (DR) POWER Mechanism analysis 

分 类 号：TU973.213[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]