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粗糙床面明槽水流能谱特性
POWER SPECTRUM CHARACTERISTICS OF ROUGH WALL OPEN-CHANNEL FLOW
【摘要】 对粗糙床面明槽水流能谱特性进行了研究,结果表明功率谱曲线、最大功率谱及相应的频率沿垂线的分布与相对光滑度大小紧密相关,据此得到了流动二维性及小尺度粗糙的判据;此外,在本实验条件下,能量主要集中在频率小于2Hz的涡体内。
【Abstract】 In this paper, the power spectrum characteristics of open channel flow over rough wall has been studied. The experimental results indicate that the distributions of power spectrum, the maximum spectrum and its frequency in vertical direction are greatly related to the relative smoothness, and the criteria to clarify the flow two-dimensionality and small scale roughness are obtained. Moreover, the energy is concentrated in the range of f<2Hz in this experiment.
【基金】 国家自然科学基金
- 【文献出处】 应用基础与工程科学学报 ,Journal of Basic Science and Engineering , 编辑部邮箱 ,1994年04期
- 【分类号】TV133
- 【被引频次】3
- 【下载频次】90