| 水流脉动压力的谱特性及相干尺度 |
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| 引用本文： | 王雨苗,路观平,张法宝.水流脉动压力的谱特性及相干尺度[J].合肥工业大学学报(自然科学版),1998(5). |
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| 作者姓名： | 王雨苗 路观平 张法宝 |
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| 作者单位： | 山东水利专科学校，安徽水利科学研究院 |
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| 摘 要： | 利用试验及时空相关分析的方法，研究了泄水建筑物紊流区脉动压力的特性。分析了在时域及频域中时空关系，指出相干函数更能刻划时空关系的频率特性，脉动压力的能量主要集中于低频区。根据试验结果，研究了脉动压力相干函数与相干尺度的分布，并对其一般性质作了一些讨论。
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| 关 键 词： | 脉动压力 相干分析 相干尺度 时空相关 |
THE SPECTRUM CHARACTER AND COHERENCE SCALE OF FLUCTUATION PRESSURE IN WATER FLOW |
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| Wang Yumiao.THE SPECTRUM CHARACTER AND COHERENCE SCALE OF FLUCTUATION PRESSURE IN WATER FLOW[J].Journal of Hefei University of Technology(Natural Science),1998(5). |
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| Authors: | Wang Yumiao |
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| Institution: | Wang Yumiao (Shandong Hydraulic Engineering Institute)Lu Guanping Zhang Fabao (Anhui Water Resources Research Institute) |
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| Abstract: | The character of fluctuation pressure in turbulance flow on discharge building is studied with test and time space correlation method.The time space relations both in time and frequency domains are analyzed.It is pointed out that the coherence function may express the frequency character of the time space relation, and the energy of the fluctuation pressure is concentrated mainly in the low frequency region. Based on test result, the distribution and character of the coherence function and scale of the fluctuation pressure are discussed. |
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| Keywords: | fluctuation pressure coherence analysis coherence scale time space correlation |
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