| 三圆柱绕流压力的脉动幅度及其与RMS值数值关系的实验研究 |
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| 引用本文： | 徐有恒,张德龙,马健.三圆柱绕流压力的脉动幅度及其与RMS值数值关系的实验研究[J].水动力学研究与进展(A辑),1997(4). |
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| 作者姓名： | 徐有恒 张德龙 马健 |
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| 作者单位： | 复旦大学应用力学系 上海200433 |
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| 摘 要： | 本文用实验的方法研究了单圆柱和正品字和倒品字排列三圆柱脉动压力幅度的大小以及它们与均方根(RMS)值之间的定量关系.在大多数情况下,脉动幅度是RMS值的3～4倍,有较固定的数值变动范围.强烈的压力脉动发生在后排圆柱的某些部位,表明了群体干扰对脉动压力幅度的严重影响,而缝隙流动影响了它们与RMS值之间的比例关系.
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| 关 键 词： | 脉动压力 脉动幅度 绕流三圆柱 |
An Experimental Study on the Amplitude of Fluctuating Pressure of Flow around a Group of Three Cylinders |
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| Xu You-heng,Zhang De-long,Ma Jian.An Experimental Study on the Amplitude of Fluctuating Pressure of Flow around a Group of Three Cylinders[J].Journal of Hydrodynamics,1997(4). |
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| Authors: | Xu You-heng Zhang De-long Ma Jian |
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| Abstract: | In this paper , the amplitude of fluctuating pressure ( Cps) of flow around a single cylinder and a group of three cylinders under two typical wind directions have been studied by wind tunnel testing. Especially, the relations between amplitude and root mean square value ( Cprms) of fluctuating pressure has been found. The amplitudes of fluctuating pressure are in the range of 3~4 times of RMS value in most situations.The large fluctualing pressure appeared on the some part of the rear cylinder, which are caused by the inter-ference of group of cylinders. The relations between Cps and Cprms are out of the range sometimes is due to the strong gap flow at small space ratios. |
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| Keywords: | fluctuating pressure amplitude of fluctuating pressure flow around a group of three cylinders |
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