边界层厚度

提出了结合湍流边界层厚度系数kδ和动量损失厚度δ2由无离心流动计算逐渐逼近离心流动的计算方法。

A method is presented that by boundary layer thickness coefficient k δ and momentum thickness δ 2 the fluid calculation without centrifugal force approaches the fluid calculation with centrifugal force gradually .

风洞地板边界层厚度控制新方法

New method for boundary layer thickness control on ground plate in wind tunnel

结果表明：当溶质浮升力改变时，壁面处的流体流动状况、边界层厚度、Nu数和Sh数都发生了变化；

The results show that the velocity of flow , the thickness of boundary layer , Nu number and Sh number all vary with different N ;

对于无电磁搅拌的溶解过程，以Fe溶解于Al熔体进行了试验，得到了Fe的溶解量以及含17.35wt%Fe的熔体的扩散边界层厚度，与纯扩散理论模型预测值吻合。

The dissolving of Fe in Al melt with a resistance furnace was carried out to investigate the diffusion process . Dissolving quantity and melt diffusion layer thickness of melt containing 17.35wt % Fe were achieved . The experimental result is consistent to the theoretical model .

我们从实验角度研究了扩散机制下的BaB2O4单晶生长中过饱和温度和降温速率对浓度边界层厚度的影响。

Experiments on the effects of supersolubility temperature and cooling rate on the thickness of concentration boundary layer were carried out in α - BaB 2O 4 crystal growth under diffusion-controlled condition .

波浪边界层厚度分析研究

The analysis and investigation of the thickness of wave boundary layer

稳定大气边界层厚度的声雷达探测研究

Study of the Stable Atmospheric Boundary-Layer Height by Acoustic Radar

北京地区边界层厚度特征的统计研究

Statistical investigation of boundary layer depth in Beijing area

射流速度、温度及浓度边界层厚度的研究

Study on Thickness of Velocity , Temperature and Pollutants Concentration Boundary Layers of Jet

边界层厚度的计算公式也基本相同，明流平板的紊流边界层具有分区性质，沿高度将边界层分为粘性底层，过渡区和紊流区。

The equations for calculating the thickness of boundary layers are fundamentally the same .

同时推导出边界层厚度与电源种类的关系。

The relationship between the layer of reactive boundary and type of power was estimated .

粘性流体绕流圆管的边界层厚度的局部相似性解法

The method of partial similarity of the boundary layer of viscous fluid flowing over circular cylinder

边界层厚度是溶体中对流条件的函数。

The boundary layer thickness is a function of the convection condition , in the melt .

考虑到前体壁面边界层厚度对流动结构的影响，提出了边界层效应的修正方法。

Taking into account the boundary layer effect on flow structure , a correct formula was given .

估算边界层厚度，为测量器件的设计提供尺寸约束。

The thickness of the boundary layer was estimated to propose the design constraint of the measure sensor .

这种影响分为两个方面：（1）边界层厚度的影响和（2）边界层动量损失厚度的影响。

The characteristics included two aspects : inlet boundary layer thickness and inlet boundary layer momentum loss thickness .

本文还提出反弧中点似为边界层厚度从增厚到减薄的突变点。

It is found that the layer thickness δ has its largest Value at the middle point of the bucket .

与国内外现有的风洞地板边界层厚度控制方法相比，这种方法颇具特色。

This method is recommendable in comparison with others for the boundary layer thickness control on ground plates in wind tunnels .

通过对边界层厚度的积分并利用相关条件，得到了边界层动量积分方程。

By the integral to boundary layer thickness and relative conditions , the momentum integral equation of boundary layer is obtained .

对纯物质水，最佳进料量对应的流动边界层厚度与膜厚之比最小。

For water , the ratio of flow boundary layer thickness to film thickness is the minimum under the optimum feeding rate .

根据得到的实验结果，分析了熔炼功率对扩散边界层厚度地影响。

Based on the experiment results about ISM process , the influence of the melting power on the diffusion layer thickness was analyzed .

径、混流式节能转子考虑边界层厚度的全可控涡设计的研究

A research of the design method of radial and mixed flow impeller with a given ALL-OVER-CONTROLLED vortex distribution considering the boundary layer thickness

微流动中，有效流体边界层厚度占微管管径的比例随压力梯度的增大而降低；

In micro flow , the percentage of effective fluid boundary layer thickness to micro tube radius decreases with the pressure gradient increasing .

本文介绍了一种风洞固定地板边界层厚度控制新方法。

A new method is described in this paper for boundary layer thickness control on the fixed ground plate in the wind tunnel .

这种方法使地板边界层厚度大大降低，而风洞仍保持好的流场品质及流场较均匀的特点。

This method can greatly decrease the boundary layer thickness on the floor , and maintain good characteristics and uniformity of the flow field .

并测定了浓度边界层厚度、膜厚度随气、液雷诺数的变化情况。

The influence of the Reynolds numbers of both gas and liquid phases on the concentration boundary layer thickness and fathomable near-surface concentration were also observed .

凸台高度与边界层厚度之比介于0.5～0.8，凸台周边倾角介于14°～45°。

The ratio of height of protuberance to boundary layer thickness is from 0.5 to 0.8 , and the oblique angles at round edge can be changed .

进一步，通过给定的稳态跟踪误差要求，可以设计合适的边界层厚度或幂次趋近律参数，不用通过仿真实验来试凑。

Furthermore , by specifying the tracking error that is required , an appropriate saturation function or power reaching law to suppress chattering is designed without simulation experiments .

在进气道进口截面处边界层厚度几乎相等的情况下，流量系数提高了15.38%，总压恢复系数提高了7%，进气道进口截面流场均匀度提高了8.8%。

The flux coefficient is increased 15.38 % . The total recovery pressure coefficient is increased 7 % . The flow equality at inlet section is increased 8.8 % .

速度边界层厚度的增加，减小了气流流速，降低了气流与壁面间的换热量，这在一定程度上增强了激光对壁面的热量加载效果。

The increase in thickness of velocity boundary layer reduces flow velocity and the heat convection between flow and wall , which improves the heat loading efficiency of laser .