流动状态

• For the problem that on - line monitoring of primary air of direct firing pulverizing system ca n ' t be complete achieved , the chaotic properties of parameter change of two - phase flow in pipe is analyzed in the paper , according to the pressure difference signal of two - phase flow system
  目前电站锅炉直吹式制粉系统的一次风气固两相流流动状态在线监测仍未得以实现，针对这一难题，本文首次基于管道内气固两相流差压信号对其流动状态变化的混沌特性进行理论研究。
• Measurement theory of coaxial line phase water cut meter and flowing feature of water oil two - phase flow have been studied in this paper . and it has been found that the response of coaxial line phase water cut meter is not only related to water cut , but also related to temperature , salinity of formation water and flowing characteristics . based on soft - measuring theory and operating theory of the meter , soft - measuring model of coaxial line phase water cut meter has been set up with directly obtainable facts such as flux , temperature of oil and water mixture and salinity of formation water
  本文在对同轴线相位法含水率计的测量机理和油井两相流动特性研究的基础上，揭示出同轴线相位法含水率计的仪器响应除了与油井含水率有关之外，而且还与油水混合介质的温度、地层水矿化度以及两项流动状态有关；结合软测量技术理论和同轴线相位法含水率计本身的测量机理以及与仪器响应有关的可以直接测量的流量、油水混合介质的温度、地层水矿化度等参数，建立基于同轴线相位法含水率计机理的软测量模型。
• In accordance with different tripping annulus at the inlet , the numerical simulations of the reattachment length were performed with the " variable c ? " model . in the range of experimental reynolds number , the tripping effect on the reattachment length was developed in the figure . the dependence of the reattachment length on reynolds number was also analysed in the different status of pipe flow
  利用变模型常数的-模型针对不同尺寸的挡环进行了再附着长度的模拟计算，在实验雷诺数范围内，建立了入口处挡环对再附着长度影响的变化曲线，分析了再附着长度在不同的管流流动状态下相对于雷诺数的变化情况。
• The hydraulic gradients of settling slurry flow transported in three kinds of moving states , i . e . suspension , saltation , or partially suspension were investigated , based on analyzing the changes of solid particles and water in momentum , velocity and their mass related to momentum exchanging over the acceleration period of the solid particles
  从固体颗粒加速期间清水与固体颗粒的速度变化、动量传递、相关质量等基本问题分析入手，研究了沉降性浆体在水平管道内流动时其固体颗粒在3种流动状态下的水力坡度，提出了沉降性浆体在水平管道内流动的机理模型，进而用该模型对一些输送条件下的沉降性浆体的水力坡度进行了计算。
• This dissertation has on the research and design of a micro turbine engine as background and it is for the purpose of comprehending viscous flow behaviors in micro scaled conditions and that in the mini - turbine cascades . a mini wind tunnel is designed and set up which also can be used in other micro flow experiments . on the basis of this mini wind tunnel , three mini flow experiments , including micro jet experiment , micro boundary layer experiment and mini - turbine cascades experiment , have been carried out
  本文以某型微型涡轮喷气发动机研制为背景,以认识微尺度下粘性流体流动状态及其机理和微涡轮叶栅通道内部流动特性为目的,设计并搭建了除本实验外还可供其他流体力学实验使用的微型风洞,并在该微型风洞基础上进行了微尺度射流实验、微尺度壁面边界层实验和微尺度涡轮叶栅实验。
• On the base of similarity theory of fluid system , the similarity numbers are analyzed , and the similarity relationship between the original model and the analogue model is researched , and much experiment has been carried out . in order to get experiment data , a computer measure system has been developed , which is mainly made up of host computer ( pc ) and extension computer ( by scm mainly )
  本文在流体力学中流动体系的相似理论基础上，推导了流场的相似准数，分析了各相似准数在模型中的作用，得出了原型(试验台)的流动状态与实船的相似关系，并据此为理论依据在原型(试验台)上进行试验研究。
• Firstly , working theory and structure of concrete pump are lucubrated . and the flowing state of the concrete in duct is analyzed by virtue of the rheology theory . secondly , the flowing model of concrete in duct is established , with that , the pressure loss of concrete flowing in duct is analyzed , too
  论文首先对混凝土泵的工作原理和结构进行了综合分析；基于流变学原理，深入分析了泵送混凝土在输送管中的流动状态，建立了混凝土在管道中的流动模型，分析了混凝土在管道中流动的压力损失；基于运动学和动力学基本原理，对混凝土s管阀的运动学和动力学进行了分析。
• The famous project of gas transiting west to east and the cross - river tunnel of huangbu river in shanghai also will be constructed with this technique , which is under the plan . among the shield tunneling methods , up to now , earth pressure balanced shield tunneling ( epbs ) is the most universal type , and it is very certain that the epbs method adopt to our country increasingly . the key factor to success in epbs is converting the muck which is lack of fluidity excavated from the cutter face to the plasticity soil . but when the shied tunneling machine advancing , it is considerably difficult to reach this requirement because of the ground soil condition , which is consist of stiff clay , silt , weathered rock , and so on
  近些年来我国城市地铁建设迅速发展，盾构施工法作为一种安全而又环保的施工方法得到了广泛的使用，另外在黄浦过江隧道，西气东输的穿黄隧道等工程也在使用盾构隧道施工技术。这其中土压平衡式盾构在我国的使用最为普遍，成为地铁隧道施工技术的主流。土压平衡式盾构施工成功的关键是要将开挖面切削下来的土体在压力舱内调整成一种“塑性流动状态” 。
• In this thesis , by changing the position of laser , increasing the operation velocity and adding the experimental materiel , the images data under the different operational condition are gotten . visual analysis of the different area of flow field is done , using a serial of images about the typical sate of flow field
  试验过程中，通过改变激光器照射截面，提高操作风速，变化物料高度，获得不同工况下的图像数据，并针对不同的流动区域，将获得的典型流动状态的连续图像进行了可视化分析。