弗劳德数

结果发现，附加摩擦阻力系数λz随弗劳德数Fr的增加而减小；

It has been found that the additonal friction factor λ z decreases with increasing Froude number Fr ;

计算结果得到以下结论：（1）当主河水流弗劳德数比较小（Fr＜0.35）时，入汇主河泥石流龙头运动速度近似以线性下降，且与试验值吻合较好；

In the case of a low Froude number ( Fr < 0.35 ), the velocity of debris flow head submerging into water exhibits an approximately linear decrease , which is in good agreement with the experimental data .

考察了卧式双轴T型搅拌器在非牛顿流体中的搅拌功率与表观雷诺数（Re＊）、弗劳德数（Fr）以及加料量的变化关系。

The relation between the power consumption of the Non-Newtonian fluid for the T-shape agitator and the apparent Renold number , Frond number , Hold-up was investigated .

扰动地面的雷诺数和阻力系数均大于原地面，弗劳德数差异不显著；

The Reynolds number and the resistance coefficient of the disturbed land was more than that of the undisturbed land .

除流速和弗劳德数外，其余水动力参数随放水时间的延长呈递增趋势；

Except the flow velocity and Froude number , the other hydrodynamic parameters increased over the water discharge scouring time .

提出模型中弗劳德数和密度弗劳德数必须同时与原型相等。

Furthermore , the Froude number and density Froude number of the flow in model and prototype should be the same .

本文从判定细沟流流态的雷诺数和弗劳德数的原始概念设计室内试验进行数据观测。

This paper , based on the primary conception of both Reynolds Number and Froude Number , designed experimental and observed data .

而坡面流弗劳德数在整个试验过程中均大于1，属于急流范围。

The Froude number of runoff flow larger than 1 under the all experiments and it is belongs to the turbulent condition .

门后通气量主要受上游来流的弗劳德数和门后空腔相对高度的影响。

The volume of aeration was affected by the Froude number and the height of the cavity pocket at the back of the gate .

对射流核长度、射流扩散角与出口弗劳德数、淹没水深之间的关系进行了探讨。

The relations among the length of the core region , the diffusion angle and the froude number and the submerged depth were also studied .

滚波具有浅水长波的特征，因而利用一维浅水方程开展滚波问题的研究，取得了丰富的成果：如判定自由面稳定性的临界弗劳德数、演化方程的理论解及试验、数值研究等。

Roll waves have the characteristics of shallow long waves . Considerable progresses are made in terms of theoretical , experimental and numerical studies by using the shallow-water equations .

影响汇流口的主要控制因素有：汇流比、汇流角、河床高差、宽深比、汇流口下游干流弗劳德数等。

All of them are controlled by following factors : discharge ratio , junction angle , difference in bed height , width to depth ratio and Froude number downstream the confluences .

进一步地分析表明，在相同的淹没深度下，对称面上温度（速度）衰减速度随密度弗劳德数的增加而减慢；

It was seen from further analysis that the decay rate of temperature ( velocity ) in the symmetry plane would decrease with the increase of dens metric Froude number at the same relative depth of submergence .

由实验得出废塑料输送管内气力输送附加压力损失系数与弗劳德准数的定量关系式，废塑料颗粒平均速度与单位管长压力损失的关系。

The quantitative relational expression is obtained about the coefficient of additional pressure loss and the Froude number by experiment , and the relation is made clear between the average speed of waste plastics particles and the pressure loss of per unit length .