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cave-in cavity
相关语句
  陷落腔
     Numerical research on pressure distribution of inside wall of a cave-in cavity with free surface under the uniform fluid condition
     均匀流场中含自由液面的陷落腔压力分布数值研究
短句来源
     Research on Fluctuating Pressure Distribution on Inside Wall of Cave-in Cavity with Free Surface under Uniform Fluid Condition
     均匀流场中含自由液面的陷落腔脉动压力分布研究
     The hydrodynamic experiment of the cave-in cavity model is carried out under the condition of uniform fluid. A large numbers of work conditions have been simulated, and the fluctuating pressure of the fluid acted on the inside wall of the cavity is measured.
     在有自由液面的情况下,针对横剖面为圆形的陷落腔模型,在均匀流场条件下,开展水动力实验研究, 模拟了大量的工况,测量了腔体壁面的流体脉动压力。
  “cave-in cavity”译为未确定词的双语例句
     Research on pressure distribution of inside wall of a cave-in cavity with free surface under uniform fluid condition
     均匀流作用下有自由液面的陷落式腔体侧壁压力分布研究
     This paper is instructive to the optimization of the cross section, especially to the design of the cave-in cavity with better hydrodynamic performance.
     本文对优化腔体横剖面形式,尤其是水动力性能较佳的陷落式腔体结构设计有较高的指导意义。
  相似匹配句对
     1. It's that cave and fracture constitute the fracture-cavity unit.
     1.缝洞单元的构成要素包括溶洞和裂缝两大部分。
短句来源
     The cavity is V type.
     谐振腔为 V型结构。
短句来源
     Exploring Cavity
     空洞探测
短句来源
     Detection of Cavity
     空洞探测
短句来源
     Atom-Cavity Q.E.D.(Continued)
     含原子腔的Q.E.D.(续)
短句来源
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The hydrodynamic experiment of the cave-in cavity model is studied under the condition of uniform cross-flow.Different cross sections of the model have been tested,such as square and circle,and the constant pressure of the fluid acted on the inside wall of the cavity is measured.By comparison of the pressure coefficient distribution at the bottom of the cavity,the influence of the sloshing phenomena on the pressure distribution in different kinds of cavities is discussed.The result of...

The hydrodynamic experiment of the cave-in cavity model is studied under the condition of uniform cross-flow.Different cross sections of the model have been tested,such as square and circle,and the constant pressure of the fluid acted on the inside wall of the cavity is measured.By comparison of the pressure coefficient distribution at the bottom of the cavity,the influence of the sloshing phenomena on the pressure distribution in different kinds of cavities is discussed.The result of experiment indicates that, under the condition of uniform cross-flow,if the diameter of the circle cavity is equal to the length of side of the square,when the Froude number is 0.35, the constant pressure at the bottom of the circle cavity is obviously less than the square cavity.While the Froude number is larger than 0.35,the constant pressure at the bottom of the circle cavity is nearly the same as the square cavity.This paper is a reference to the optimization of the cross section,especially to the design of the cave-in cavity with better hydrodynamic performance.

在有自由液面的情况下,针对横剖面为圆形和方形的陷落腔模型,在均匀流场条件下的水动力数值实验研究,取得了腔体壁面的流体定常压力和脉动压力的实验数据.利用计算流体力学软件CFX对有自由液面的陷落腔内液体的晃荡现象和压力分布进行了数值计算,分析了模型所受的定常压力随傅汝德数和腔体形状的变化趋势,在脉动力分析中利用随机过程的理论,并讨论了晃荡现象对压力分布的影响.

Moonpool is just like a cave-in cavity with a free surface. With the help of empirical mode decomposition (EMD) method this experiment was conducted in a towing tank. The key part of the EMD method is that complicated data set can be decomposed into a finite and often small number of 'intrinsic mode functions (IMF)'. By a comparative method, the data were collected with and without the moonpool in all conditions separately. With the empirical mode decomposition, the intrinsic mode functions of the data,...

Moonpool is just like a cave-in cavity with a free surface. With the help of empirical mode decomposition (EMD) method this experiment was conducted in a towing tank. The key part of the EMD method is that complicated data set can be decomposed into a finite and often small number of 'intrinsic mode functions (IMF)'. By a comparative method, the data were collected with and without the moonpool in all conditions separately. With the empirical mode decomposition, the intrinsic mode functions of the data, and then the PSD spectrum of each IMF are obtained. From the difference of each PSD spectrum between the results with and without moonpool, the data for the flow over the moonpool can be obtained. For the moonpool, the fluctuating force consists of the water oscillation and the shear layer self sustained oscillation. The frequency of the water oscillation is determined by the shape and size of the moonpool. The frequcney of the shear layer self sustained oscillation is also related with the flow velocity over the moonpool, which will change with the velocity. When the two frequencies are close to each other, a resonance will happen. In this experiment, when the Froude number falls within the range of 0.26 to 0.39, the resonance phenomenon is observed. It appears that the water in the moonpool moves up and down in the vertical direction. This is so-called the "Piston" phenomenon. When the Froude number is greater than 0.52, there is no resonance phenomenon any more. In this paper, under some assumptions and the potential flow theory, the resonance frequency of the water in the moonpool is calculated, which is very close to the experiment result. In a resonance, the fluid fluctuating force in the moonpool is a harmonic force. The frequency is the same as the resonance frequency and the amplitude is great. When there is no resonance, the fluctuating force can be obtained with the EMD method, which consists of the shear layer oscillation and the water oscillation. The wall pressure is also measured in this investigation. The wall pressure of the moonpool is found quite different not only in value but also in distribution in the circumferential direction and the vertical direction, whether in resonance or not.

采用基于经验模态分解(EMD)的本征模态函数(IMF)分析方法和对比研究的实验方法,实验研究了圆形月池在均匀流条件下的流激振荡特性.通过实验研究发现,尽管腔内的流体在不同来流的条件下运动趋势有所不同,但归纳起来对于月池结构,其内部存在两类振荡源,一类是腔内流体的固有振荡,该频率与腔体结构形式、尺寸、腔内流体深度有关,与来流无关;另一类则是流体流经腔口时产生的流体动力振荡,该频率与来流特性、速度有关.当二者频率相近时将会激起腔内流体的共振,即会有“活塞(piston)”现象产生.实验中,还在腔体侧壁上布置了压力传感器,用来分析腔体侧壁受到的流体压力特性及其变化趋势.

>=The hydrodynamic experiment of the cave-in cavity model is carried out under the condition of uniform fluid. A large numbers of work conditions have been simulated, and the fluctuating pressure of the fluid acted on the inside wall of the cavity is measured. The trend of the fluctuating pressure coefficient in different position of the cavity is analyzed, and the influence of the sloshing phenomena on the pressure distribution is discussed. It is found that in the experiment, when the Froude...

>=The hydrodynamic experiment of the cave-in cavity model is carried out under the condition of uniform fluid. A large numbers of work conditions have been simulated, and the fluctuating pressure of the fluid acted on the inside wall of the cavity is measured. The trend of the fluctuating pressure coefficient in different position of the cavity is analyzed, and the influence of the sloshing phenomena on the pressure distribution is discussed. It is found that in the experiment, when the Froude number is less than 0.35, the sloshing phenomena will happen, and in these conditions, the fluctuating pressure coefficients are much larger than other conditions and change intensively. The result of the experiment indicates that, the resonance of the cut layer's self-sustain vibration and the liquid's depth stationary wave vibration is the reason of the sloshing phenomena. The velocity of the fluid in the conditions when the Froude number is less than 0.35 has reached the demanded velocity to generate interaction between the two kind of vibrations mentioned above.This paper is instructive to the optimization of the cross section, especially to the design of the cave-in cavity with better hydrodynamic performance.

在有自由液面的情况下,针对横剖面为圆形的陷落腔模型,在均匀流场条件下,开展水动力实验研究, 模拟了大量的工况,测量了腔体壁面的流体脉动压力。本文分析了模型所受的脉动压力随傅汝德数在不同腔体位置的变化趋势,并讨论了晃荡现象对压力分布的影响。实验时发现,傅汝德数小于0.35的工况有明显的晃荡现泉发生,而傅汝德数小于0.35的工况的脉动压力系数也明显大于其他工况,且变化剧烈。本文认为,流体剪切层自持振荡与腔内液体深度驻波振荡共振是产生晃荡现象的原因,本文实验中Fr≤0.35的工况对应的流速正是达到以上两种振荡频率耦合所需要的流速。本文对工程应用中的腔体尺度和形式的设计有一定的指导意义。

 
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