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相干
    很抱歉,暂未找到该词条在当前类别下的译词。您可以查看在所有学科下的译词。
相关语句
  “相干”译为未确定词的双语例句
    On the Conditions of Waves' Interference
    刍议波的相干条件
短句来源
    NUMERICAL SIMULATION OF MANY-COHERENT STRUCTURES IN THE WALL REGION OF TURBULENT BOUNDARY LAYER
    湍流边界层近壁区多个相干结构的数值模拟
短句来源
    The coat change the distributing of energy, thephased-average evolution shapes and the flatness factor, enhance the coherentstructures, make the flow regular, and work on and control the multi-scale coherenteddy structure in a turbulent boundary layer, in order to reduce the resistance of thewall.
    通过改变平板湍流边界层中不同尺度相干结构的能量分布、条件相位平均波形、平坦因子、相对强度、发生概率,使湍流结构相干性增强,流动有序化程度提高,从而对平板湍流边界层中原有的多尺度相干结构进行控制,以达到壁面减阻的目的。
短句来源
    Anti-vibration reliability design is based on conventional vibration design andreliability design.
    抗共振和刚度可靠性设计是运用常规振动设计理论和可靠性相干理论相结合的方法建立的新的设计理论。
短句来源
    NUMERICAL STUDY OF THE CONERENT STKUCTURES IN WALL REGION OF A CHANNEL FLOW
    槽道湍流近壁区相干结构的数值模拟
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This paper investigates the development of a horseshoe vortex in the uniform wall shear flow by means of the asymptotic marching method based on the Navier-Stokes equation. The evolution of the ejection and sweep events in the outer layer of a disturbed shear flow are simulated by vortex dynamics, and a strong coherent motion of the vortex has been discovered. For instance, both vortices, representing the ejection and sweep events respectively, are rotating towards the first principal direction of the strain...

This paper investigates the development of a horseshoe vortex in the uniform wall shear flow by means of the asymptotic marching method based on the Navier-Stokes equation. The evolution of the ejection and sweep events in the outer layer of a disturbed shear flow are simulated by vortex dynamics, and a strong coherent motion of the vortex has been discovered. For instance, both vortices, representing the ejection and sweep events respectively, are rotating towards the first principal direction of the strain rate tensor, and strengthened by stretching ete. The development of the flow field in the inner layer is directly calculated by numerical integration of analytical solutions. Under the action of the disturbances from outer layer new vortices are generated, they slowly lift up while the thickness of the Stokes layer is gradually increasing. The numerical results are in good agreement with previous flow visualization pictures, thus it indicates that vortex dynamics is an applicable method for investigating the coherent structure in wall shear flow.

从Navier—Stokes方程出发.应用渐近衔接方法研究了马蹄涡在均匀切变流中的发展。在外层,用涡方法模拟了上抛和下扫两种马蹄涡的发展过程,初步地探讨了有壁切交流中马蹄涡的相干性。例如发现两种渴都向基本流的第一主变形率方向偏转,不断受到拉伸而增强等等。在内层,通过直接求解Stokes方程而得到流场的发展过程,发现在外层扰动作用下,内层有新的涡产生并且随其厚度增加而缓缓升起。数值计算的结果与已有的流场显示结果相一致,从而说明涡动力学方法在研究切变层的拟序结构中是有效的。

Based on the measuring results that wall pressure fluctuations are mainly decided by coherent structures of turbulence, the relationships between root-mean-square wall pressure and wall shear stress in turbulent shear flow and that between the intensities of pressure and fluctuating velocity in homogneous and istropic turbulence were established in this paper. These relationships are harmonious with former works, and have good agreement with experimental data. The paper also discusses the concept of "apparent...

Based on the measuring results that wall pressure fluctuations are mainly decided by coherent structures of turbulence, the relationships between root-mean-square wall pressure and wall shear stress in turbulent shear flow and that between the intensities of pressure and fluctuating velocity in homogneous and istropic turbulence were established in this paper. These relationships are harmonious with former works, and have good agreement with experimental data. The paper also discusses the concept of "apparent pressure" on the wall in mean flow.

基于固体边界上水流压力脉动主要决定于低频大尺度相干结构这一测量结果,本文导出在剪切紊流中的壁压强度和壁面剪应力间的关系式,以及在均匀各向同性紊流中的脉压强度和脉动流速强度间的关系式。所得关系式和以往的研究结果是协调的,和实测资料也有较好的一致性。本文还讨论了在时均流边界上存在紊动“似压强”的概念。

Coherent structures and the bursting phenomena in the wall region of a turbulent boundary layer play a very important role in determining the characteristics of the boundary layer. Yet the nature and the origine of the coherent structures are unclear until now. In this paper, nonlinear stability calculations for the wall region of a turbulent boundary layer have been done. It was found that there do exist instability waves which may be responsible for the coherent structures.

湍流边界层底层的相干结构及猝发现象对决定边界层的特性有很重要的意义,但直至现在对相干结构的性质及起因仍不清楚。在本文中,对湍流边界层的底层进行了非线性稳定性分析,发现该处确可产生不稳定波,可能用以说明相干结构的起因。

 
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