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circular duct
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  “circular duct”译为未确定词的双语例句
     Technique and die design for hole punching on circular duct
     圆管冲孔工艺与模具设计
短句来源
     Numerical Simulation and f Re's Correlation for Fully Developed Flow of Power Law Fluid Through a Semicircular Duct and Flat Circular Duct
     幂律流体在半圆及扁圆形通道中充分发展流动数值分析与阻力计算
短句来源
     EFFECTS OF PHYSICAL PARAMETERS OF CIRCULAR DUCT IN SHEAR FLOW ON SOUND ATTENUATION
     剪切流圆管物理参量对声衰减量的影响
短句来源
     Numerical simulation of turbulence in curved circular duct
     弯曲圆形管道紊流的数值模拟
短句来源
     Compared with flow inside common circular duct, the transition range from laminar flow to turbulence becomes narrow, so that there is not the friction factor f increases with Re in f\|Re plot, Critical Reynolds numbers Re c vary with the aspect ratio c , its maximum value is 2 340.
     与普通圆管流动相比较 ,其层流 -紊流的过渡区变窄 ,不出现 f -Re图上阻力系数 f随 Re增大而增大的那一小段曲线 ,以及层流到紊流的最大临界雷诺数Rec 随高宽比 c而变 ,其最大值为 2 3 40
短句来源
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  相似匹配句对
     Numerical simulation of turbulence in curved circular duct
     弯曲圆形管道紊流的数值模拟
短句来源
     Technique and die design for hole punching on circular duct
     圆管冲孔工艺与模具设计
短句来源
     Circular Economy
     循环经济论
短句来源
     Circular Economy
     让循环经济转起来
短句来源
     Adenoma of the Nipple Duct
     乳头管腺瘤
短句来源
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  circular duct
The numerical results obtained for the circular duct with insulating wall are very close to the results obtained by means of analytical formulas.
      
Entrance effects on low prandtl number convection through a circular duct
      
The unsteady axisymmetric jet produced by discharge of a mixture of a pressurized gas and dispersed particles from a circular duct into the atmosphere is studied within the framework of two-velocity, two-temperature gas dynamics.
      
Behavior of the unsteady jet of a mixture of a pressurized gas and dispersed particles discharged from a circular duct into the
      
An analytic solution is obtained for forced convection flow in a parallel-plates channel or a circular duct occupied by a hyper-porous medium saturated with a rarefied gas in the slip-flow regime, for the case of uniform flux boundary conditions.
      
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The propagation of a long wave in a three-dimensional curved duct with variable cross section is studied in this paper. It is shown that a three-dimensional Helmholtz Equation can be decomposed into a two-dimensional Laplace (or Poisson) Equation and a one-dimensional Webster Equation by the curvilinear orthogonal coordinate system, non-dimensioni-zation of reduced wave equation and regular perturbation with small parameter ka, where k is the wave number and a is the characteristic radius of the duct. The influences...

The propagation of a long wave in a three-dimensional curved duct with variable cross section is studied in this paper. It is shown that a three-dimensional Helmholtz Equation can be decomposed into a two-dimensional Laplace (or Poisson) Equation and a one-dimensional Webster Equation by the curvilinear orthogonal coordinate system, non-dimensioni-zation of reduced wave equation and regular perturbation with small parameter ka, where k is the wave number and a is the characteristic radius of the duct. The influences of the duct's geometric parameters (the area variation of the cross section, the curvature and torsion of the central line) to the asymptotic expansion of the solution are analysed. It is concluded that the effects of the variation of the cross-sectional area first appear in the first term of the asymptotic expansion, and when the cross section shape has certain symmetric properties, the effects of the curvature and torsion of the central line first appear in the third- and the fourth-terms, respectively. An example of long wave propagation in a curved circular duct is also given at the end of the paper.

本文研究长波在三维变截面弯管中的传播问题.通过建立正交曲线坐标系,以波数k和管道横截面的特征半径a的乘积ka作为小参数,对波动方程进行无量纲处理,用正则摄动法,把三维的Helmholtz方程化为二维的Laplace(或Poisson)方程和一维的Webster方程.并分析了管道的几何参数(横截面面积、管道中心线的曲率和挠度)对复速度势渐近展开的各阶项的影响.文中指出,横截面面积的变化首先影响浙近解的零阶项.在横截面的形状具有某种对称性时,管道中心线的曲率首先影响渐近解的二阶项,而挠度首先影响渐近解的三阶项.最后,给出了长波在弯曲圆管中传播的实例.

Flat-circular duct, which has appeared in duct design recently, is a reasonable shap for saving energy, metal and mainly, space in a compact ship, Plane or conveyance. In this paper we deduce the circular equivalent of the flat-circular on the basis of equal flow rate and resistance to flow in both ducts.

新近出现的扁圆形螺旋风管,对于空间紧凑的交通工具。是一种省地位、省动力、省材料而又加工方便的合理产品。本文提出其以流量为准的当量直径公式,以利于系统计算。

Flat-circular duct, which has appeared in duct design recently, is a reasonable shap for saving energy, metal and mainly, space in a compact ship, Plane or conveyance, In this paper we deduce the circular equivalent of the flat-circular on the basis of equal flow rate and resistance to flow in both ducts.

新近出现的扁圆形螺旋风管,对于空间紧凑的交通工具,是一种省地位、省动力、省材料而又加工方便的合理产品。本文提出其以流量为准的当量直径公式,以利于系统计算。

 
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