摘要
本文研究了在大气边界层气流中同轴双方柱气动力载荷的相互干扰,讨论了这种干扰与风向角和间距比之间的关系。结果表明处于相邻方柱的干扰下,上游方柱的最大气动力载荷大于单体的载荷;而下游方柱则受到前往明显的阻挡作用,不仅如此,当风向角为0°,小间距下的后柱,不但没有阻力,还会受到反向的推力。还发现在串列情况下存在和双圆柱类似的临界间距,阻力和升力在临界间距附近有明显的突变。同时将本实验的结果和一些文献中的结果进行了比较。
The interference effects on wind loads of two prismatic cylinders arranged in a line were studied in this paper. The experiments were conducted in an atmosphere boundary layer wind tunnel in Fudan University, and the flow field was simulated as terrain C in Chinese code. The interference effects were seriously in some arrangements (space ratio and azimuth) . The maximum wind loads on upstream prismatic cylinder were greater than those on single prism. And downstream prismatic cylinder was got negative force in some azimuths. When two prismatic cylinders were in tandem arrangement, a critical space was found as two circle cylinders undergo in the same situation. Around the critical space, the drag and lift force changed remarkably. The results in this paper were compared with that in other relative literatures.
出处
《力学季刊》
CSCD
2000年第3期365-370,共6页
Chinese Quarterly of Mechanics
基金
上海市建设技术发展基金(A9605101)
上海市工程结构新技术重点实验室资助
