The void fraction of annular two-phase flow inside cylinder is analyzed.
对圆管内环状两相流的空泡份额进行了分析。
The method for predicting void fraction and pressure drop is then developed.
然后再分析预测孔隙率和压降的模型。
In annular flow the penetrating effect of stream A makes the void fraction same besides a baffle.
在环状流下，A流路的贯通作用使折流板前后对应区域的含气率基本一致；
The change regularities on void fraction and density of powder material were revealed mathematically.
同时，运用数学的方法揭示了粉体的空隙率和粉体密度的变化规律。
The result indicates that the sound speed is related to the void fraction, local pressure and flow pattern.
试验结果表明，气液两相流音速与气泡率、当地压力及其流型有关。
The calculated results of void fraction and transition segment length agree well with the experimental data.
含气率以及过渡段长度分布的计算值与试验值符合较好。
The definition of the void fraction and the calculation formula for the void fraction determining were given.
给出了孔隙率的定义和确定孔隙率的方法。
The results show that the effect of a void fraction distribution on this construction of capacitor is not evident.
结果表明，电容法的主要影响因素——空泡分布对这种结构的电容器影响不大。
Dynamic thermomechanic analysis (DMA) shows that effect of CaCO3 for reinforcing RPUF have relation to void fraction.
在动态热机械分析实验中，交联密度对颗粒填料的增强效果有明显影响。
Higher foaming pressure will lead to smaller cell size. However, too high foaming pressure may lower the void fraction.
增大发泡压力有利于减小泡孔孔径，但压力过高会降低发泡硅橡胶的孔隙率。
A method of using metal probe for measuring the void fraction at any point in gas-liquid two-phase flow on Sieve tray is described.
用金属探针法测量塔板上气液两相流中某些点的含气率。
In this paper, the prediction of void fraction and pressure drop for upward gas-liquid annular flow in a vertical annulus is studied.
对垂直同心环形管内上升气液环状流的截面含气率及压降预测进行了研究。
Element approach is employed, and the amount of each component holdup is calculated element by element with a proper void fraction model.
将换热器分解成若干微元，选用恰当的空泡数学模型，计算各组分在换热器中的滞留量。
This paper describes an experimental and theoretical research on the void fraction of two-phase flow in horizontal helically coiled tubes .
本文从试验和理论两方面详细地研究了卧式螺旋管内气液两相流截面含汽率的分布与变化规律。
The acquired typical void fraction signal is presented and qualitative discussion to the dynamic process and mechanism of flow is hence delivered.
定性讨论了不同流型下典型动态时序信号的差别与相应的流动现象与机理。
The calculation of the void fraction in subcooled boiling is different from that in saturated boiling, it is characterized thermal in equilibrium.
欠热沸腾下的空泡份额计算不同于饱和沸腾，具有热不平衡特点。
For the various flow pattern in the various simulated conditions of this paper, the maximum radial void fraction is most at the center of the tube.
在本文模拟工况下出现的各种流型，其径向持气率的最大值基本出现在管中心。
The effects of gas flow rate and rotating speed on the fluid field, local void fraction distribution and bubble size distribution were investigated.
考察了不同通气量和操作转速下气液搅拌槽内流体流动，局部气含率和气泡尺寸的分布规律。
Error analysis showed that the measurement error is usually less than 10% for low void fraction flow. So this is a lowcost and accurate measurement method.
误差分析表明，这种测量方法在低空泡率条件下测量误差一般不超过10 %，它是一种低成本、高精度的绝对测量方法。
Void fraction distribution characteristics in rod bundle with grid spacer is one of the important aspects in reactor thermal hydraulic characteristics research.
带定位格架棒束通道内的空泡份额分布特性是反应堆热工水力特性研究的重要内容。
Several of the focuses of CFD model in packed-bed reactors were studied, namely, the momentum exchange coefficient, the capillary pressure and the void fraction.
近年来填充床反应器CFD数学模型韵几个研究重点是动量交换系数、毛细管压力以及床层空隙率的非均匀分布性。
The steady-state flows in drill pipe and in annulus are analyzed and the variations of pressure, gas void fraction, and multiphase-flow density along the well depth are simulated.
举例分析在环空和钻柱内的稳定流动过程中，随井深增加，压力、含气率、多相流体密度等的变化规律；
The oscillating lift coefficient increases with the growth of the void fraction in such a way that it increases slowly before the void fraction up to 0.1 and after that, increases faster.
脉动升力系数先随含气率的增大而缓慢增加，在含气率增大到0.1后增大得较快。
The void fraction in downward gas oil two phase flow in vertical tube is measured with the combined method of horizontal downward vertical tube for the two flow regimes(bubbly and slug flow).
采用水平—下降管组合法测量了垂直下降管内油气两相流动在泡状和弹状流下截面含气率的值。
The performances of all the models deteriorate as the void fraction increases. The reason may be attributed to the geometrical differences between a circular tube and narrow rectangular channel.
随空泡份额的增大，各模型的计算性能均变差，可能是通道几何差异所致。
Void fraction is one of the basic parameters in steam liquid two phase flows. To date, the study of methods for calculating subcooled boiling void fraction mainly focused on high mass flow rates.
空泡率是汽液两相流动的基本参数之一，而已有过冷沸腾空泡率计算方法研究以高质量流速为主，且大量文献报道现有空泡率模型难以适用于低流速过冷沸腾工况。
The conductivity probe was used to measure the instantaneous local void fraction in the horizontal pipe and the illustrative picture of probability density of flow pattern translation is obtained.
使用自行设计、制作的电导探针测量系统，测量了水平管内瞬时、局部空隙率，并且得到流型转变的特征密度概率图谱。
According to different optics-dispersion character, threshold segmentation method is proposed to identify gas from the gas-water flow, which make steadfast base for further calculate void fraction.
根据气泡和水对光的反射特性不同，提出采用阈值法识别图像中的气泡和水，从而为进一步计算掺气浓度打下坚实的基础。
The change of sound velocity with pressure, dryness degree, void-fraction, and phase-transition coefficient are analyzed. Some important conclusions are derived.
分析了两相流体中音速随压力、干度、汽隙率、相变系数等的变化关系，并从中得出了一些重要的结论。
The change of sound velocity with pressure, dryness degree, void-fraction, and phase-transition coefficient are analyzed. Some important conclusions are derived.
分析了两相流体中音速随压力、干度、汽隙率、相变系数等的变化关系，并从中得出了一些重要的结论。
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