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初始流速
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  initial flow velocity
     Comparing with craft and quality of two tapered extrusions during turning round blank direct extrusion into flat square section,and adopted double tapered die orifice water diversion in the concave die hole,first put forward during the initial course of extrution,utilizing double tapered angle form large initial flow velocity and material's initial flow mass,overcome resist strength peak value and achieve the goal of flowing at the uniform speed around the die orifice.
     对大变形程度、圆坯正挤压出两种变截面挤压方式进行了工艺和质量对比,在凹模型孔形式上采用了双锥角模口导流方式,第一次提出了在挤压初始阶段,利用双锥角形成大的材料初始流速和流动惯性来克服流动前期变形抗力峰值以达到模口材料周边匀速流动目的的理论。
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  “初始流速”译为未确定词的双语例句
     while the maximum flow pressure has a nonlinear relationship with the inlet initial flow rate, and the flow pressure of the large-diameter pump is lower than that of the small-diameter pump in total. The result of the analysis can provide a reference for the design of the internal structure of the rod pump as well as the determination of geometric parameters of the pump.
     通过计算知,泵筒内流体的最大速度与入口端的初始流连基本满足线性关系,而最大流压与入口端的初始流速不满足线性关系,直径大的泵,其流压整体上要比直径小的泵要小,分析结果可为杆式泵的内部结构设计和几何参数的确定提供一定的参考依据。
短句来源
     This paper analyzes the phenomena of hydraulic shock in the steering system of submarine and discusses about the technical measure to treat the hydraulic shock noise in a comprehensive way and their effects.
     分析潜艇操舵系统的液压冲击现象 ,介绍所采取的改变关闭速度、加装软管、加装消声器、降底管路中的初始流速、改进管路固定方式、加装吸收液压冲击的蓄能器等综合治理技术措施
短句来源
  相似匹配句对
     The air velocity has little effect on the initial frost crystal shapes.
     空气流速初始霜晶形状的影响不大。
短句来源
     The amount of catalyst, initial concentration of phenol and flow rate in the reactor have the effect on the degradation rate.
     催化剂用量、苯酚的初始浓度、流速对其降解速率有影响;
短句来源
     initial pH;
     初始 pH值 ;
短句来源
     Gas Velocity Measurement in MHD Generator
     磁流体发电机流速的测量
短句来源
     2) Velocity profile method;
     2) 流速剖面法;
短句来源
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  initial flow velocity
A series of calculations is carried out which permit the pressure distribution in the diffuser to be investigated in the case of change of the initial flow velocity, coefficient of slip of the phases, and the initial humidity of the flow.
      
It is shown that the nonequilibrium flow stability is reduced with increase in the initial flow velocity and the energy pumping zone width.
      


By means of the K- ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed. Calculation results show that, the maximum speed of the fluid in the pump barrel has a linear relationship with the initial flow rate at the inlet; while the maximum flow pressure has a nonlinear relationship with the inlet...

By means of the K- ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed. Calculation results show that, the maximum speed of the fluid in the pump barrel has a linear relationship with the initial flow rate at the inlet; while the maximum flow pressure has a nonlinear relationship with the inlet initial flow rate, and the flow pressure of the large-diameter pump is lower than that of the small-diameter pump in total. The result of the analysis can provide a reference for the design of the internal structure of the rod pump as well as the determination of geometric parameters of the pump.

针对杆式泵泵简内的流体流动问题,采用湍流模型的K-ε两方程模型和有限元方法,对在一个抽油循环中阀与活塞在几个特定的位置的流体流动进行了建模与计算,具体分析了处于阀道内和同心环状空间中的原油在上下冲程的运动规律。通过计算知,泵筒内流体的最大速度与入口端的初始流连基本满足线性关系,而最大流压与入口端的初始流速不满足线性关系,直径大的泵,其流压整体上要比直径小的泵要小,分析结果可为杆式泵的内部结构设计和几何参数的确定提供一定的参考依据。

This paper analyzes the phenomena of hydraulic shock in the steering system of submarine and discusses about the technical measure to treat the hydraulic shock noise in a comprehensive way and their effects.

分析潜艇操舵系统的液压冲击现象 ,介绍所采取的改变关闭速度、加装软管、加装消声器、降底管路中的初始流速、改进管路固定方式、加装吸收液压冲击的蓄能器等综合治理技术措施

The fibres network has high intensity and apparent viscosity when the mass consistency of pulp suspension is up to 10%. The fluid field is divided into two areas when medium-consistency (MC) suspension flows at low velocity in a pipeline. This paper described computational fluid dynamics (CFD) simulation of medium-consistency suspension plug flow in diameter-varying pipeline, the simulation and experiment showed:“viscosity flow” behavior exists in the annular region near the wall and "plug flow" exists in the...

The fibres network has high intensity and apparent viscosity when the mass consistency of pulp suspension is up to 10%. The fluid field is divided into two areas when medium-consistency (MC) suspension flows at low velocity in a pipeline. This paper described computational fluid dynamics (CFD) simulation of medium-consistency suspension plug flow in diameter-varying pipeline, the simulation and experiment showed:“viscosity flow” behavior exists in the annular region near the wall and "plug flow" exists in the main region. The pulp suspension near the wall will stop flowing and only the pulp suspension in the center of the pipeline flows if the initial velocity is too low, it is the phenomenon called “channel flow”.

中浓纸浆悬浮液 (浆浓大于 1 0 %时 )的纤维网络具有明显的强度 ,表观粘度值较高 ,其在管道内低速流动时 ,流场分为 2个区域 ,文中根据CFD(计算流体动力学 )的数值模拟研究了中浓纸浆在变径管内的塞流流动 ,模拟结果和实验结果同时表明 ,对于中浓纸浆 ,当在变径管道内流动时的初始流速较小时 ,整个流场分为近壁面的环形区域和除环形区外的主流区域 ;如果流速太低 ,极可能造成管道内近壁区的浆料滞流 ,而管道中心处的纸浆流动呈“沟流”现象。

 
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