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圆弧叶片
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  “圆弧叶片”译为未确定词的双语例句
     The results of our method have been compared with the exact solutions of the laminar boundary layer problem on a rotating circular arc blade given by R. M. Halleen, J. P. Johnston and W.
     本方法的结果与 R.M.Hallen, J.P.Johnston和 W.R.Reynolds关于“旋转圆弧叶片上的层流边界层”[4]的精确解作了比较。
短句来源
     For this reason numerical predictions, made using Computational Fluid Dynamics (CFD), are presented describing the behaviour of the performance of three two-equations turbulence models: the standard k-ε and k-ω and the SST (Shear Stress Transport) turbulence model. Comparaison are made in order to evaluate their predictive capability for turbulent flow through double-circular-arc axial compressor blade geometry ,giving emphasis to the accurate modeling of separated flow .
     本论文采用混合网格和有限体方法,求解Reynolds平均Navier-Stokes方程,应用三种湍流模型,即标准的k-ε模型,k-ω模型,SST模型,对三个攻角(+5.0°、-1.5°、-8.5°)下的双圆弧叶片的轴流式压缩机叶栅进行了湍流数值模拟。
短句来源
     Compared with the single-curved blade,the uniformity of encountering points of the 3-D twisted blade is better.
     对三元扭曲叶片和单圆弧叶片的碰点分布进行了计算比较,前者比后者的分布均匀程度有所改善。
短句来源
     Aimed at the problem of influence of vane shape of composite vane pumps on the force action on the vane itself,the force action process in the vicinity of pump inlet is analyzed and modelled in connection with such three cases as the thick-less vane,circular single-side backward vane top,and vane with circular skeleton line,and then a series of variation of contacting reactional forces on the major vane of the pump is simulated and obtained.
     针对子母叶片泵叶片形状对受力影响的问题,就无厚叶片、顶部为圆弧的单面后倾叶片和对中圆弧叶片3种情况对吸油区叶片受力过程进行了分析与建模,并仿真得到一系列母叶片所受接触反力的变化曲线.
短句来源
     The radius of top arc of the vane with circular skeleton line may be selected be means of optimization when the factors such as force action on the vane,vane configuration,and vane kinematics are taken into consideration comprehensively.
     可以通过优化的方法,综合考虑叶片受力状况以及叶片的结构与运动等因素,来选取对中圆弧叶片顶部圆弧的半径.
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  相似匹配句对
     Machining Method of Blade Circular Root Rabbet
     叶片圆弧榫头加工方法及分析
短句来源
     Analysis and Calculation of Machining Accuracy for Arcuate Blade Root
     叶片圆弧榫头加工成形精度分析和计算
短句来源
     Arc Fitting
     圆弧拟合
短句来源
     leaf> leafstalk.
     叶片>叶柄。
短句来源
     leaf>leafstalk.
     叶片>叶柄。
短句来源
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  curved blade
The computational domain includes the curved blade surface as well as the coolant regions and the plenum.
      
The rostellum-like apical organ is armed with five to six irregular rows of small hooklets with a wide, oval basal plate and a short, posteriorly curved blade.
      
To verify the proposed repair solution, a curved blade to be repaired was used in the experiment and the blade tip model was reconstructed for the subsequent repairing process.
      
Special curved blade turbine agitators are used to maintain optimum performance even at high gas rates.
      


The first part of this paper deals with the application of Karman and -Pohlhausen's method to the general problem of a two-dimensional laminar boundary layer with pressure gradient in a rotating system. It is a generalization of the approximate integration method[1,2,3] for solving the problem of a two-dimensional laminar boundary layer with pressure gradient in a stationary system. But the generalized in method could be appled to a rotating system. When the rotating speed=0, the results could be transformed...

The first part of this paper deals with the application of Karman and -Pohlhausen's method to the general problem of a two-dimensional laminar boundary layer with pressure gradient in a rotating system. It is a generalization of the approximate integration method[1,2,3] for solving the problem of a two-dimensional laminar boundary layer with pressure gradient in a stationary system. But the generalized in method could be appled to a rotating system. When the rotating speed=0, the results could be transformed to the original form given by H. Holstein and T. Bohlen[2]. In the second part of this paper, the boundary-layer growth for three types of velocity distribution at the trailing side which are typical for centrifugal impeller blades is calculated, and the optimum velocity distribution is also discussed. The conclusion agrees essentially with the results given in the reference [13]. The position of separation at the trailing side was calculated for blades of two different impellers and the result was compared with the measured values. The two experimental impellers were designed to satisfy the reverse transition criterion. The results of our method have been compared with the exact solutions of the laminar boundary layer problem on a rotating circular arc blade given by R. M. Halleen, J. P. Johnston and W. C. Reynolds[4].Our results are also compared with those given by G. Jungclaus[5] concerning the solution of the boundary layer problem on a rotating flat-plate blade by using the Karman-Pohlhausen method.

本文第一部份将卡门——波尔豪森方法应用于旋转系统中的、有压力梯度的二维层流边界层上。它是一般的固定系统中的、有压力梯度的二维层流边界层的积分近似法[1][2][3]的推广。当Ω=0时,其结果全部转换到H.Holstein和T.Bohlen[2]的原来的形式。 本文第二部份,用上述方法计算了离心式叶轮叶片吸力边上,三种具有典型意义的速度分布的边界层发展,并讨论了最佳速度分布。其结论与文[13]的结果基本一致。我们还用上述方法估算了两个叶轮吸力边上的分离点位置,并将其结果与实测数据进行了比较。这两个试验叶轮被设计成满足逆转捩准则。 本方法的结果与 R.M.Hallen, J.P.Johnston和 W.R.Reynolds关于“旋转圆弧叶片上的层流边界层”[4]的精确解作了比较。也与G.Junsclaus关于“用卡门——波尔豪森方法分析旋转平板叶片上的边界层”[5]的结果作了比较。

The particle trajectories and the impeller erosion in a centrifugal fan with 3-D twisted blades are studied theoretically and experimentally.With the aid of 2-D rebounding experimental formulas,a set of calculation formulas for 3- D twisted blade particle rebounding is worked out.Compared with the single-curved blade,the uniformity of encountering points of the 3-D twisted blade is better.The performance of the fan,whether it is exposed to particle flow or not,can be measured successfully with back to back probe.The...

The particle trajectories and the impeller erosion in a centrifugal fan with 3-D twisted blades are studied theoretically and experimentally.With the aid of 2-D rebounding experimental formulas,a set of calculation formulas for 3- D twisted blade particle rebounding is worked out.Compared with the single-curved blade,the uniformity of encountering points of the 3-D twisted blade is better.The performance of the fan,whether it is exposed to particle flow or not,can be measured successfully with back to back probe.The theoretical calculation agrees well with the experiments and it is proved that the two-phase flow model used in this paper is feasible in the design and manufacture of the fans with higher efficiency and better resistance to wear.

本文对三元扭曲叶片叶轮离心风机内粒子运动轨迹及叶轮磨损情况进行了理论分析和实验研究。考虑风机叶片的三元扭曲特性,推得一整套三元扭曲叶片粒子反弹的计算公式.对三元扭曲叶片和单圆弧叶片的碰点分布进行了计算比较,前者比后者的分布均匀程度有所改善。用靠背管测量含尘与不含尘时的风机特性是可行的.试验证明,本文所用的两相流物理模型,其理论计算与试验结果有很好的一致性,对设计和制造耐磨性较好、效率较高的风机有一定的实用价值.

Two centrifugal impellers with different relative axial sizes and relative exit widths are studied.The 2-D and 3-D blades are designed for both the impellers respectively under their same meridional contours for each studied impellers.The internal flow field of the impellers with different blade type are compared using the quasi-three dimensional flow surface theory.Special emphasis are given on the differences between the blade surface velocity distributions and the results are analysed and discussed.

选择两个不同相对轴向尺寸和相对宽度的叶轮,在各自子午型线保持不变的情况下,分别对每一个叶轮构造普通圆弧叶片和三元扭曲叶片。利用S1,S2流面理论简化计算模型对所构成的具有不同叶片形式的叶轮进行了内部流场计算。着重对比了叶片表面的速度分布,对其起因进行了分析讨论。

 
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