| 深埋隧道地震动力响应的复反应分析 |
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| 引用本文： | 何友声,刘桦,赵岗. 深埋隧道地震动力响应的复反应分析[J]. 力学学报, 1997, 29(1): 1-7. DOI: 10.6052/0459-1879-1997-1-1995-189 |
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| 作者姓名： | 何友声 刘桦 赵岗 |
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| 作者单位： | 上海交通大学工程力学系，200030 |
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| 摘 要： | 采用高速摄影技术对定常来流中ＮＡＣＡ４４１２翼的不稳定的空泡流形态特征进行了水洞试验研究．试验结果揭示了由于空泡形态断裂而产生的低频脉动现象．这一现象在跨空泡流（Ｔｒａｎｓ－ｃａｖｉｔａｔｉｎｇｆｌｏｗ）情况下尤为明显，常使空泡长度和厚度在大幅范围内拟周期地变动，其频率特性比较稳定，有别于空泡末端局部泡团脱落而产生的脉动
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| 关 键 词： | 复反应法 动力响应 复模量 深埋隧道 |
| 收稿时间： | 1996-12-26 |
A STUDY ON PULSATION OF TWO-DIMENSIONAL CAVITATING FLOW |
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| He Yousheng Liu Hua Zhao Gang. A STUDY ON PULSATION OF TWO-DIMENSIONAL CAVITATING FLOW[J]. chinese journal of theoretical and applied mechanics, 1997, 29(1): 1-7. DOI: 10.6052/0459-1879-1997-1-1995-189 |
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| Authors: | He Yousheng Liu Hua Zhao Gang |
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| Affiliation: | Chengdu Institute of Technology, Chengdu 610059 |
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| Abstract: | The unsteady behavior of a two-dimensional cavitating flow around a NACA4412 foil is investigated in a cavitation tunnel by using the high-speed photography. The high speed photographic records show that there is a low frequency pulsating phenomenon caused by the abrupt breakup of cavity. This pulsation of cavitating flow appears significantly in case of the trans-cavitating flow and results in the pseudo-periodic evolution of cavity length and cavity thickness. The frequency characteristics of the low-frequency pulsation seems to be stable and is different from the pulsation caused by the local breakupof the cavity at its tail zone. |
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| Keywords: | cavitating flow trans-cavitating flow breakoff pulsation high-speed photography |
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