助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   速度梯度 在 力学 分类中 的翻译结果: 查询用时:0.819秒
图标索引 在分类学科中查询
所有学科
力学
航空航天科学与工程
动力工程
地质学
环境科学与资源利用
矿业工程
机械工业
物理学
公路与水路运输
更多类别查询

图标索引 历史查询
 

速度梯度
相关语句
  velocity gradient
    The formula relating the effect of velocity gradient broadening, given by Berman and Dunning, is confirmed by the experimental data in the measurements.
    由Berman和Dunning所给出的有关速度梯度加宽的效应的式子也从本测量中得到了实验数据的支持。
短句来源
    Model experiments were made to investigate the effects of velocity gradient, wall-proximity and Reynolds number on measuring errors of pressure probes.
    通过模拟实验研究,分析了速度梯度、近壁效应和Re数对几种叶轮机流场测量用压力探针测量误差的影响。
短句来源
    The velocity gradient,especially the perpendicular velocity gradient,leads the measuring error of flow angle with cylindrical probe to be larger than with conical multi-hole probe.
    梯度使气流方向测量值向负梯度方向偏转。 圆柱探针和锥形多孔探针相比,气流方向测量误差对速度梯度更敏感,纵向梯度对俯仰角测量值的影响尤其大。
短句来源
    The effects of the velocity gradient and wall-proximity on the measuring errors are related to the flow direction.
    近壁对总压测量影响不大。 速度梯度和近壁对测量误差的影响还与来流方向有关。
短句来源
    The computational results indicate that surface roughness has little influence on pressure, density and temperature of the flow field. But its effect on velocity of the flow field is pronounced. The velocity of the gas flow and the velocity gradient near the wall is decreased.
    计算结果表明 ,进出口压力一定时 ,表面粗糙度对流场的压力、密度及温度分布的影响不大 ,但是对速度场的影响十分显著 ,表面粗糙度使气体流动速度减小 ,并使壁面附近的速度梯度减小 ,从而使通过管道的气体质量流量减小 ,在微管内的气体流动中 ,表面粗糙度的影响是不能被忽略的。
短句来源
更多       
  velocity gradients
    Computational results show that the wall temperature has only little effect on the heat flux, the drag and the fore-stagnation-point pressure, although gas properties as well as temperature and velocity gradients at the yclinder sur-face vary significantly.
    计算结果表明,尽管壁温下的热物理性质数值有几倍的变化,传热量、阻力系数及前驻点压力变化不大,动量与热量交换过程主要取决于来流参数而不是壁面参数。 壁温变化时,壁面处气体的温度梯度与速度梯度大小发生相应变化,流动分离点及局部传热率最低的位置也略有变化。
短句来源
    through the analytical solution of the ASM equatipns with minimal linearization assumption, the present work is able to obtain the analytical relation between the Reynolds stresses and mean velocity gradients.
    本文通过求解雷诺应力在代数应力模式中与平均速度梯度之间的分析关系,研究了代数应力模式在涡旋流动特别是在充分发展旋转管流中存在的内在缺陷。
短句来源
    On the basis of algebraic stress model proposed by Rodi, a universal non linear constitutive relation between the Reynolds stress and the mean velocity gradients which include the second order terms is formulated by applying tensor invariance theory in this paper.
    从Rodi提出的代数应力模型出发 ,根据张量不变性函数理论 ,导出雷诺应力与平均速度梯度之间较通用的、含有速度梯度二次导数项的模型公式 .
短句来源
    In this paper, the material parameters of fibre suspensions (kind and dimension of the fibre) show an important influence upon turbulence. According to a simulation by the Phoenics software, we can draw the following conclusions: the velocity gradients increase with the concentration for the same kind of pulp suspension, and at the same time, the shear stress and the difference of the radial concentrations increase;
    分析了纸浆的物性参数对两相流动模拟的影响,这些物性参数主要包括浆流种类、纤维的尺寸等参数,通过Phoen-ics软件的模拟得出结论,对于同类型的纸浆而言,随着浓度的增大,流体的速度梯度增大,剪切应力增大,径向浓度差增大;
短句来源
  “速度梯度”译为未确定词的双语例句
    THE EFFECTS OF MEAN STRAIN ON THE STRUCTURE OF TURBULENCE
    平均速度梯度对湍流结构的影响
短句来源
    It is found that drag reduction occurs with adequate wavenumbers and grows with an increase of H. The mechanisms are revealed through variations of velocity profile and the decrease of wall shear stress.
    将结果同部分湍流悬浮流减阻的实验结果进行定性比较。 分析减阻机理是流速分布曲线及近壁区速度梯度介于层流与湍流之间,H值增大引起壁面剪应力显著下降。
短句来源
    The relation between the gradient of local (plastic) shear deformation and the local (plastic) shear strain and that between the gradient of velocity and the strain rate were established.
    建立了局部(塑性)剪切变形梯度与局部(塑性)剪切应变分布之间的关系及速度梯度与应变率分布之间的关系。
短句来源
    In the case of high shock Mach number, a numerical method for calcu-lating a kind of equilibrium boundary layer considering the effect of real ga-ses is given. Numerieal results of velocity and temperature profiles as wellas velocity and temperature gradients at the wall are presented for a widerange of shock Mach number from 2 to 12. The effect of viscous factorl =ρμ/ (ρμ).
    以氮气为试验气体,在强激波Mach数下,给出了平衡真空气体效应时的一种数值方法,并在M_s=2~12的范围内得出了边界层内的速度分布和速度梯度分布以及温度分布和温度梯度分布的计算结果。
短句来源
    Computational results show that the prediction of the basic closure greatly overestimates the magnitude of every component of the reynolds-stress tensor giving no deviation of the direction of shear-stress vector from that of velocity-gradient vector, whereas the corresponding prediction of the refined nonlinear .
    结果表明:应用基准二阶矩模式所得雷诺应力诸分量的预计值均比相应的测量值大得多,且完全不能预计切应力方向相对于速度梯度方向的滞后;
短句来源
更多       
查询“速度梯度”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  velocity gradient
A new approach to designing the velocity gradient-based algorithms to control the observables of the quantum-mechanical systems was proposed.
      
The basic rheological relations for the motion of viscoelastic media and a thixotropic viscoelastic medium in a constant longitudinal velocity gradient field were developed in [1] for the case of plane flow with a stagnation point.
      
Below we investigate the kinematic and dynamic characteristics of liquid motion in a longitudinal velocity gradient field which is not constant in time, and we study some particular cases using as an example a Maxwellian liquid.
      
It is shown that in the case of a positive velocity gradient of the secondary flow (α1>amp;gt;0) the additional conditions which result from the physical flow pattern determine a unique solution of the system of boundary-layer equations.
      
For a negative velocity gradient of the secondary flow (α1≤0) these conditions are satisfied by two solutions.
      
更多          
  velocity gradients
Account is taken of the nonzero velocity gradients in the surface layers of the air and the water.
      
The dependence of the environmental characteristics on the induced anisotropy is found by means of self-consistency for large velocity gradients.
      
As a result, the transverse velocity gradients induced in the separation zone exert a strong destabilizing influence on the flow.
      
It is concluded that the phenomenon under consideration is caused by the presence of a region with high horizontal sound velocity gradients, which correspond to the transition from the cold waters of the eddy to the warm waters of the Sargasso Sea.
      
The masses are in good agreement with the calculations of other authors based on models of the velocity gradients of the maser features.
      
更多          


In the first part of the paper, the formulas of calculating gradients of a scalar, divergents and vorticities of a vector in non-orthogonal curvilinear coordinates are presented by vector analysis. With aid of these relations we then obtained basic aero-thermodynamic equations governing relative steady flow of a nonviscous fluid in a tur-bomachine. General non-orthogonal coordinates are suggested for solving φ-equation of three-dimensional turbomachine flow. The potential equation for three-dimensional flow...

In the first part of the paper, the formulas of calculating gradients of a scalar, divergents and vorticities of a vector in non-orthogonal curvilinear coordinates are presented by vector analysis. With aid of these relations we then obtained basic aero-thermodynamic equations governing relative steady flow of a nonviscous fluid in a tur-bomachine. General non-orthogonal coordinates are suggested for solving φ-equation of three-dimensional turbomachine flow. The potential equation for three-dimensional flow calculation is obtained.ψ-equations (Wu's equations), expressed in term of general non-orthogonal coordinates, of two kinds of stream surfaces are discussed in the third part.In the last part of this paper, three forms of velocity gradient formulas are presented.

本文应用向量分析的方法,推导出非正交曲线坐标系的梯度、散度和旋度的计算公式,从而得到了无粘性流体在叶轮机械中稳定相对运动的三维流动的气动热力学基本方程。然后,讨论了用任意非正交曲线坐标表示的势函数方程,以及两类相对流面(S_1和S_2流面)的流函数方程(吴仲华方程)。最后也给出了速度梯度法(或称流线曲率法)方程的三种形式。

Starting from the theory for solving the three-dimensional flow by cross iteration of two families of stream-surfaces, proposed first by Professor Wu, the present paper gives a "stream-surface coordinate" iterative method in arbitrary through flow sections. Through the use of two sets of non-orthogonal stream-surface coordinates suited for various kind of turbomachines, velocity gradient equations along these two sets of coordinate directions are iteratively solved, and the complete three-dimensional flow fields...

Starting from the theory for solving the three-dimensional flow by cross iteration of two families of stream-surfaces, proposed first by Professor Wu, the present paper gives a "stream-surface coordinate" iterative method in arbitrary through flow sections. Through the use of two sets of non-orthogonal stream-surface coordinates suited for various kind of turbomachines, velocity gradient equations along these two sets of coordinate directions are iteratively solved, and the complete three-dimensional flow fields in turbomachinery are obtained.The results of numerical examples have given two families of stream-surfaces, both twisted in their shape. A comparison has been made with the result, of the common-used two-dimensional stream-surface solution. The calculation has also been made for a. tested centrifugal compressor impeller, the comparison with measurement result is satisfactory.

从吴仲华教授最早提出的两类流面交叉求解三元流动的理论出发,本文给出一种任意通流截面上的“流面坐标”迭代法,采用适合各类叶轮机械的两组非正交流面坐标,以及沿这两组坐标方向速度梯度方程的迭代求解,得到了叶轮机械内部的完全三元流场。 计算实例给出了均为扭曲的两类流面形状,并与普通的二元流面解进行了比较,在一个试验过的离心压气机叶轮的计算中还与测量结果进行了比较,结果是满意的.

In this paper, on the basis of the hypothesis of Heisenberg for the transfer function of velocity fluctuation energy, the transfer function for scalar fluctuation "energy" is suggested. The characteristics of scalar fluctuation "energy" spectrum concerning the large wave number case for the homogeneous turbulent flow with constant transverse mean velocity gradient and scalar gradient are discussed.

本文在Heisenberg关于速度脉动能量传递函数假设的基础上,提出标量脉动“能量”传递函数的相应形式.讨论了具有常值横向平均速度梯度与标量梯度的均匀湍流流场中关于大波数情形的标量脉动“能”谱性质。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关速度梯度的内容
在知识搜索中查有关速度梯度的内容
在数字搜索中查有关速度梯度的内容
在概念知识元中查有关速度梯度的内容
在学术趋势中查有关速度梯度的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社