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spiral casing
相关语句
  蜗壳
     Three-Dimensional Modeling Design for Centrifugal Spiral Casing Based on Pro/E
     基于Pro/E的离心蜗壳三维模型设计
短句来源
     A Hydraulic Design Method of Sheet Metal Spiral Casing of Water Turbine
     水轮机金属蜗壳水力设计方法研究
短句来源
     Analysis and Discussion on Giant Spiral Casing Embedded with Soft Cushion Layer
     巨型水电站采用垫层蜗壳的分析与探讨
短句来源
     The Calculation on Compensation Values of Spread Spiral Casing
     金属蜗壳展开补偿计算
短句来源
     Strength and stiffness analysis of spiral casing with different embedded manners
     水轮机蜗壳不同埋设方式的流道结构刚强度分析
短句来源
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  螺旋套
     Renovation on Spiral Casing of Twin-screw Pump and Application
     双螺杆泵螺旋套的改造与应用效果
短句来源
  “spiral casing”译为未确定词的双语例句
     Development of Spiral Casing Centralizer and its Application
     套管旋流扶正器的研制与应用
短句来源
     Influence of rock resistance and temperature difference on the spiral casing structure of large-sized hydropower station
     岩石抗力和内外温差对大型水电站蜗壳结构的影响
短句来源
     CFD Analysis of Flow Inside Spiral Casing and Stay Vanes of Waterpower Recycle Equipment
     水能回收装置引水部件内部流场的CFD分析
短句来源
     Based on the solution of Navier-stokes equations, the standard K-e turbulent model and Euler equations, the numerical simulation on the model hydraulic spiral casing for the Sanxia (Three - Gorge) project has been carried out by using the body - fitted coordinates, the staggered grid system and the SIMPLEC algorithm.
     文中基于Navier—Stokes方程的标准K—ε紊流模型、欧拉方程模型,采用贴体座标和交错网格系统,用SIMPLEC算法.
短句来源
     The parameterized drawings derived by Pro/E are easily to be modified for series designs, which offers a new feasible modeling design method for spiral casing.
     生成的Pro/E参数化图形直观、简洁、形象,便于修改设计和对产品进行系列化设计。
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  spiral casing
We consider the complex problem of numerically simulating a flow in the fluid passage of a hydraulic turbine that consists of a spiral casing, a cascade of stay vanes and guide apparatus vanes, a runner, and a draft tube.
      
Simulation detects tangential velocity increase also from the top of the spiral casing to the outlet region.
      
In the spiral casing, tree-dimensional tetrahedral meshing has been formed.
      
In this case the entire turbine from spiral casing to the draft tube is considered.
      
For construction reasons the spiral casing and the draft tube are seldom redesigned.
      
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The present paper is aimed at offering a general introduction to the rapidly developed boundary element method (BEM) with the focus on its theoretcial essence, starting from the theory of the point-source function. The intrinsic connection and the remarkable differences between the indirect and the direct solutions of BEM have been expounded. What is more, the detailed processes of discretization of these two solutions have also been developed. The practical application of BEM in fluid mechanics was illustrated...

The present paper is aimed at offering a general introduction to the rapidly developed boundary element method (BEM) with the focus on its theoretcial essence, starting from the theory of the point-source function. The intrinsic connection and the remarkable differences between the indirect and the direct solutions of BEM have been expounded. What is more, the detailed processes of discretization of these two solutions have also been developed. The practical application of BEM in fluid mechanics was illustrated through a typical calculation for a hydraulic spiral casing on the low-head hydro-electric power station.

本文综合介绍了新近发展迅速的边界元法。其着重点在于:从点源函数理论出发,阐明边界元法的实质,从而指明间接与直接解的内在联系和主要差别。与此同时也具体地说明了两种解答的离散过程。最后通过低水头水电站蜗壳的水力设计说明了边界元法在流体力学中的应用。

This paper presents a study of cold forming cracks on oxy-gas cut surfaces of weld grooves of 14MnMoVN steel plates for spiral casing.If 14MnMoVN steelplates are cut with the same parameters for mild steel plates of same thickness,cracking might take place in the cutting HAZ during subsequent cold bending.Metallographical tests show that there is a thin ledeburite layer at the surface ofthe gas-cut surface.The observation of cracking process reveals the ledeburite layeris so low in ductility that micro-cracks...

This paper presents a study of cold forming cracks on oxy-gas cut surfaces of weld grooves of 14MnMoVN steel plates for spiral casing.If 14MnMoVN steelplates are cut with the same parameters for mild steel plates of same thickness,cracking might take place in the cutting HAZ during subsequent cold bending.Metallographical tests show that there is a thin ledeburite layer at the surface ofthe gas-cut surface.The observation of cracking process reveals the ledeburite layeris so low in ductility that micro-cracks occur at the very beginning of bending.These micro-cracks will extend under certain conditions.From the viewpoint ofminimizing the detrimental influence of ledeburite layers,the paper proposes faciletechnical methods to improve bending ductility.

本文介绍了14MnMoVN 钢板气割坡口冷作成形裂纹的研究结果。在气割14MnMoVN 钢板的焊接坡口时,如采用同厚度低碳钢板的气割参数,气割热影响区在冷弯时有产生裂纹的可能。金相观察表明.在气割面上有一莱氏体层存在。开裂过程的观察表明,此莱氏体层塑性很低,在弯曲时首先产生小裂纹,在一定条件下这种裂纹将要向母材扩展。从减少或去除莱氏体层这一观点出发,中提出了一些防止产生冷作成形裂纹的工艺措施.

Irregular outline and complicated boundary condition in reinfor- ced concrete spiral casing,make it difficult to simplify processing in the structural computation and structural model tesl,its result is not the same as real s ate。 is necessary o pass pro oype test to oain the real structural stress of engineering during the operation. In this paper,throngh the structural test in reinforced concrete spiral casing in Qingtongxia Hydropower Station,some important da- ta about structural strss in spiral...

Irregular outline and complicated boundary condition in reinfor- ced concrete spiral casing,make it difficult to simplify processing in the structural computation and structural model tesl,its result is not the same as real s ate。 is necessary o pass pro oype test to oain the real structural stress of engineering during the operation. In this paper,throngh the structural test in reinforced concrete spiral casing in Qingtongxia Hydropower Station,some important da- ta about structural strss in spiral casing are obtained and a prelimi- nary inquiry into water case function is made after corasting the protoylic test to structural computation and structural model test. Useful suggestions are prolosed for continual structural analysis in reinforced cocrete spiral casing

钢筋混凝土蜗壳由于其有着渐变而不规则的外形,边界条件又很复杂。给结构计算和模型试验的简化处理造成较大的困难,其成果和工程结构实际状态相差较大,因此有必要通过原型试验获得结构在实际运行中的真实应力.本文通过青铜峡电站钢筋混凝土原型结构应力试验,获得了一批钢筋混凝土蜗壳应力的重要资料,在与计算和模型试验进行对比之后,还对蜗壳水箱功能进行了初步探讨,为进一步分析钢筋混凝土蜗壳应力提出了有益的建议.

 
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