层流

In this paper ,the protection mechanism of air curtain on horizontal parallel flow area is analysed.

本文分析了气幕对水平层流洁净区的保护机理，通过对气幕区及被保护洁净区的流场及浓度场特性分析，提出了较合理的气幕结构参数，从理论上证明了该种形式的气幕具有良好的围挡效果。

Where this is not possible, transfer operations must be protected by laminar airflow work stations.

如果不可能，转移操作要在空气层流工作站的保护下进行。

Based on Bernoulli equation and laminar flow theory, the theoretical calculation formula of fluid viscous damper with double-guide bars style is established according to hydrodynamics theory.

2以伯努利方程和层流理论为基础，根据流体力学理论建立了双出杆型粘滞流体阻尼器的理论计算公式，并探讨了理论计算公式与实际应用之间产生差异的原因。

Referring to Bessel function,a calculation equation of temperature distribution in the surface and heat-flow density of wax deposit layer in the laminar flow is deduced,as well as temperature distribution inside.

通过对试验环道上测试段相关数据的测试，对比分析测试段管壁有沉积物和无沉积物时测试段管壁内温度分布的不同表达式，根据能量方程建立了无量纲温度分布方程，利用贝赛尔函数推导出原油在层流状态下沉积层表面温度分布、沉积层热流密度、油流温度分布等相关温度场的计算公式，为研究蜡沉积规律，定性分析管路结蜡层厚度和制定合理的清管方案奠定了理论基础。

It is pointed out that in three-phase stratified flow the existence of water damps the waves generated at the oil-gas interface, and there is roll wave in peak zone of the neutral stability curves.

在给出油气水三相分层流分类的基础上，使用一维三流体模型对具有代表性的流动类型——包含油水乳状液的分层流进行了分析和求解，确定了相分率、压降和其它流动参数的计算方法。

The gas flowrate decreasing is associated with the pressure undershoot and temporary stratified flow. The magnitude of pressure undershoots and stratified period are sensitive to the magnitude of gas flowrate change and the distance away from the entrance of pipeline.

气量降低过程会有压力&过降&和短暂分层流型的出现，压力&过降&值和短暂分层流周期的大小除与气体的降低量有关外，还与测压点距管道入口的距离有关。

The properties of the shear layers are analyzed in the states of purely laminar, fully turbulent and laminar+transition+turbulent using the Thwaites Integral and Head Integral methods.

文中采用的数值求解过程为：首先求解给定翼型的位流速度分布，在此基础上采用Thwaites积分法和Head积分法，分别计算纯层流、纯湍流以及层流+转捩+湍流这三种流态的边界层，分析三种流态的边界层特性。

Some primary metering grooves with different curvature radiuses and geometrical dimensions were designed,and the hydraulic characteristics of them were all tested Based on the experiment results, different flow characteristics of them were obtained The great differences between the experimental results and the conventional theoretical predictions were found by the comparison between them Under the condition of this experiment, the critical Reynolds is 1000～1200, and is diminished as the decrease of th...

为了在设计层板发汗冷却推力室时选择合适的一次调节通道，对不同曲率半径、不同几何尺寸的一次调节通道进行了流阻试验，得出了不同几何尺寸的一次调节通道的流动特性。试验结果与经典的层流理论计算结果之间存在较大的差异。试验表明，一次调节通道的临界雷诺数随曲率半径的减小而减小，摩阻系数随曲率半径的减小而增加，并得出了相应条件下的一次调节通道摩阻系数的修正关系式，在层流范围内能较好地反映一次调节通道的流阻特性

Separator; 2— air compressor; 3— oil tank;4— water tank; 5— oil pump; 6— thermocouple;7— pressure meter; 8— valve; 9— orifice; 10— oil-gas mixer; 11— test section

首先讨论分层流情况下一维瞬态两流体模型，图2给出了水平管内油气共同流动分层流时的示意图。

A new single-wire capacitance probe with a high sensitivity of 1.52 pF/mm was used to measure water layer height in oil-water two-phase flows in horizontal pipes.

利用一种单丝电容探针，对水平管内机油-水两相流的水相高度进行测量。实验中油、水相折算速度分别为0~0.2 m/s和0~0.8 m/s，覆盖了水为连续相的全部流态：包括波状分层流、三层流、水包油/水和水包油4种流型。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。