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particle speed
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  磨粒速度
     Primary theoretical and experiment results indicate that the effects of the pulse frequency and amplitude on the abrasive particle speed in the SOAWJ nozzle are notable. The particle speed in SOAWJ may be faster than that of the pre mixed abrasive water jet, and the maximum penetration speed of SOAWJ could increase 41%.
     根据初步研究表明,磨粒速度受脉冲频率和幅度影响很大,磨粒速度可超过前混合磨料射流中磨粒的速度,最大钻孔速度比前混合磨料射流提高41% 。 这一成果有望用于坚硬物料的切割和特种加工、石油钻井、大洋采矿、难采矿体的开采、坚硬岩石巷道(遂道)掘进、表面清洗等领域。
短句来源
     The characteristics of configuration and operating principle of Collimated Abrasive Water Jets (CAWJ) and particle accelerating equation with energy loss in the collimating pipe are analyzed. Theoretical and experimental results show that particle speed of CAWJ retains constant basically as the pipe length is in the range of 0.4m to 3m. There is all optimal relationship between the parameters of the collimating pipes and abrasives.
     分析了准直磨料射流的工作原理、特点及高速多相流体介质在准直管内有阻运动时的磨粒运动方程式.研究表明,准直管管长在0.4m~3m范围内磨粒速度基本保持不变,准直管长度、直径、供料量和磨粒型号等参数之间存在最佳配合关系.本文为使用准直磨料射流进行切割和冲蚀的工程应用提供了初步的理论基础.
短句来源
     Theoretical and experimental results show that the speed and density for each phase in the multiphase transient flow are varying along the collimating pipe, and the particle speed of CAWJ is basically constant within the range of pipe length 0.4m to 3m. It is also found that fine abrasives are suitable for use in shorter pipes and crude abrasives for longer pipes.
     研究表明 ,气 (汽 )、液流体介质和磨料介质在准直管中的速度和密度是逐渐变化的 ,在 0 .4~ 3m管长范围内磨粒速度基本保持不变 ,短管时采用细磨粒 ,长管时采用粗磨粒 .
短句来源
  颗粒速度
     CALCULATION OF PARTICLE SPEED IN GAS-SOLID TWO-PHASE PIPE STREAM
     气固二相管流中颗粒速度计算
短句来源
     Analysis to speed field of particle in impeller and worm room of centrifugal slurry pump serves as example, initial flowing image obtained by high speed photography is transferred to digital image by computer interface. In order to deal with digital image, a Windows application software is programmed by Visual C++, and particle speed field is calculated by displacement of different particle and duration between two samplings.
     以离心式渣浆泵叶轮和蜗室内的颗粒速度场分析为例,将高速摄影所得到的原始流动图象,经计算机接口转换为数字图象,应用VisualC++编制WINDOWS应用软件对这些图象进行处理,通过对不同位置颗粒的位移和相邻图象间所采样的时间计算出颗粒速度场。
短句来源
  粉粒速度
     Based on analyses of the feeding pattern of coating materials,its behavior in laser beam and the attenuation of laser beam by particle cloud during porcess of laser coating with automatic powder feeding,analytical model of calculating the laser efficiency,the particle speed and the cross section of cladded coating were established.
     在分析自动送粉式激光熔覆材料加入方式、粉粒运动规律、吸热特性以及粉末云对激光束强度衰减规律的基础上 ,给出粉粒速度、激光作用效率及熔覆层横截面面积的计算公式 ;
短句来源
  “particle speed”译为未确定词的双语例句
     DISTRIBUTION CHARACTER OF PARTICLE SPEED IN THE BEAM OF PARTICLE RAYS
     粒子射线束中的粒子速率分布特性
短句来源
     Analysis of Particle Speed in Fluid Using Digital Image Correlation Techniques
     用数字图象相关技术分析流体中粒状物的运动速度
短句来源
     By experiment,the curves and equations of relationship between the heat transfer coefficient and parameters of average diameter,particle size distribution and particle speed are obtained.
     用试验方法研究了固体粒子绕流园管的换热系数,得出了换热系数与固体粒子的平均直径、粒度分布、颗粒运动速度等参数的关系曲线和关系式。
短句来源
     Theoretical and experimental results show that particles accelerate rapidly in the entrance of the pipe,and the arbasive particle speed basically reaches its maximum when the particles pass about 0.5 meter from the pipe entrance.
     理论与试验研究表明 ,磨粒在准直管入口段加速度很大 ,经过 0 .5m的加速距离后基本上达到了最大速度。
短句来源
     The results show that the purification efficiency is enhanced by proper magnetic field, -6 kV direct current voltage is an optimal value and there are two optimal values of the plate span and the initial particle speed according to different situations.
     结果表明 ,引入适当强度的磁场可提高净化效率 ,理想的预荷电放电电压为 - 6kV(直流 ) ; 根据具体情况 ,集尘板间距和粒子的初速度存在着一个最佳值 .
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  particle speed
Results are given for the variation of coating porosity, thickness and roughness with varying particle speed, size, and spraying gun speed.
      
Determining particle speed in depositing powder coatings
      
In circumstances where stochastic acceleration is expected, a suprathermal tail on the distribution function is formed with a common spectral shape: the spectrum is a power law in particle speed with a spectral index of?-5.
      
The resonant waves are HM waves for ions with β?βA(βc = particle speed, βAc = Alfvén speed) and for electrons with γβ ? 43β0(β0 ≈ 43βA), and are whistlers for electrons with β0 ? γβ? 43β0.
      
The calculations suggest that, for a two-, rather than three-dimensional system, the correlational energy density should grow more rapidly with time, but should exhibit only a weak logarithmic dependence upon the typical particle speed.
      
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In this paper,the distribution law of particle speed in the beam of particle rays is discussed from the relativistic point of view. From it we find there is a most probable particle circular cylinder in uniform velocity motion. At the same time,we also discuss the condition in which the effect of the particle' s first velocity can be neglected,and lay foundations for thorough researches of other problem.

本文从相对论的角度讨论了粒子射线束中粒子的速率分布律,从中认识到存在一作匀速运动的最可几粒子园柱体,同时还讨论了忽略粒子初速影响的条件。

Oridinary double-pulse-exposed holography can be used to measure a number of particle parameters, including particle speed, in a dynamic particle field, however, since two particle field images recorede at different pulse moments are reconstructed simultaneously, the direction of particle movement can not he determined. A preliminary report of the technique proposed for alleviating this problem is given in this article, by which two particle field images corresponding to different...

Oridinary double-pulse-exposed holography can be used to measure a number of particle parameters, including particle speed, in a dynamic particle field, however, since two particle field images recorede at different pulse moments are reconstructed simultaneously, the direction of particle movement can not he determined. A preliminary report of the technique proposed for alleviating this problem is given in this article, by which two particle field images corresponding to different pulse moments can be reconstructed sparately with the help of polarization beam splitter and spatial filtering. Experimental resuets are given too.

双脉全息图可应用于动态微粒场中粒子形状、尺寸、密度和速度等分布参数的测定。但由于两个脉冲时刻所拍摄的粒子像只能同时再现,不能判断粒子运动速度的方向,在运动情况较复杂时,粒子的“配对”也很困难。本文提出一种技术,可以分别再现两个脉冲时刻的粒子场图像,从而实现粒子速度方向的判定,同时减小了配对困难。

The tranist time correlation method is sensitive both to flow profile and to turbulence, lead-ing to unavoidable uncertainties in application. This paper presents a new correclation gradientmethod, which outlines a theory of non-intrusive meaturement of particle speed and mass flowrate in two-phase flow. The theory shows that the time derivative of the signal cross-correla-tration of the solid phase.Furthermore,the derived model leads to an overlaped sensor arrange-ment and signal processing scheme, which...

The tranist time correlation method is sensitive both to flow profile and to turbulence, lead-ing to unavoidable uncertainties in application. This paper presents a new correclation gradientmethod, which outlines a theory of non-intrusive meaturement of particle speed and mass flowrate in two-phase flow. The theory shows that the time derivative of the signal cross-correla-tration of the solid phase.Furthermore,the derived model leads to an overlaped sensor arrange-ment and signal processing scheme, which makes it possible to measure the true mean velocities.Experiment result in pneumatic conveyors by capacitive sensor has proved the good agreement be-tween theory and practice.

介绍了一种用于测量流体速度与流量的新型测试技术-梯度相关法。通过对非接触式流体测量模型的进一步探讨,提出了新的传感器设置与信号处理方法,使得利用相关法直接测量流体的平均流速成为可能。气-固两相流的实验结果证明了上述理论与实际相符。

 
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