摘要
目的:研究无患子复叶在风速0~22.7 m/s范围内的复叶形态变化及气动特性。方法:通过风洞实验及高速拍照法拍摄无患子复叶形态变化。结果:在实验风速范围内,无患子复叶出现6种状态,分别为叶轴大幅弯曲、U型稳定、叶轴低频振动、叶片对合稳定、高频振动及合成卷稳定。结论:随风速的持续增加叶轴倾角θ最终稳定在80°附近,叶片倾角θ1最终稳定在90°附近;复叶特征宽度相对变化数最终稳定在0.2附近;叶轴末端位移在空间范围内呈螺旋式上升。
Aims:This paper studies the aerodynamic characteristics and reconfiguration of Soapberry's compound leaves in the 0~22.7 m/s wind.Methods:Soapberry's compound leaves,morphological change was observed by wind tunnel experiments and high speed photography.Results:There were six types of state of Rachis bend,U steady,Rachis low frequency vibration,blade matching steady,Rachis high frequency vibration and synthetic volume steady within the experimental wind speed range.Conclusions:With the wind speed increasing,rachis inclination was in the vicinity of 80° and leaf inclination in 90° finally.Feature width was in the vicinity of 0.2 finally.Rachis tail displacement rose spirally.
作者
赵洪涛
邵传平
ZHAO Hongtao;SHAO Chuanping(College of Metrology and Measurement Engineering,China Jiliang University,Hangzhou 310018,China)
出处
《中国计量大学学报》
2019年第2期144-149,共6页
Journal of China University of Metrology
基金
国家自然科学基金项目(No.11172286)
关键词
计量
无患子复叶
重构
倾角
特征宽度
位移
measurement
Soapberry's compound leaves
reconfiguration
inclination
feature width
displacement
