The critical state of flow is defined as the condition for which the Froude number is equal to unity. 将弗氏标数等于1的情况规定为流动的临界状态。
Except the flow velocity and Froude number, the other hydrodynamic parameters increased over the water discharge scouring time. 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;
Experimental Studies on the Frequency Properties of the Fluctuating Pressure in Stilling Basins with Lower Froude Number 低佛洛德数消力池水流脉动压力频率特性的试验研究
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. 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。
Hydraulic Characteristics of Auxiliary Energy Dissipater and its Application in Energy Dissipation by Hydraulic Jump with Low Froude number 辅助消能工的水力特性及在闸下低佛氏数水跃消能中的应用
It is shown that the relationship exists among the location of the flaring gate piers, the Froude number at the section of starting flare, the weir head, the head loss and the gate width. 研究了宽尾墩位置、始扩点水流佛汝德数与堰上水头之间的关系,导出了与水头损失、闸门宽度有关的计算公式。
The Froude number of flow is the factor of flow status: supercritical flow or subcritical flow. 由流体流动的福劳德数可以确定流动的缓急程度。
The result of the experiment indicates that the assistant energy dissipater can solve the problems of energy dissipation and erosion-control of flood discharging structure for low Froude number flow. 研究结果表明,采用适当的辅助消能工能有效地解决低水头泄水建筑物的消能防冲问题。
By analyzing the impact factors of the vertical vortex, the relational expression between the formed type of vertical vortex and the intake Froude number, the circulation number and the submergence depth are founded. 通过分析旋涡形成的影响因素,建立了立轴旋涡的形成和类型,与佛汝德数、环量数和淹没水深三个参数的关系式。
Ships running in shallow water are affected by the restricted water depth, and a speed parameter-depth Froude number, which is not occurred in deep water, but important in shallow water. This makes the comparison more complicated. 由于船在浅水中航行,较在深水中多了一个有限水深的限制,速度参数也较深水中多了一个水深佛氏数,使情况更为复杂。
A 1 ∶ 1 water model of a twin-roll strip caster has been set up based on the Froude number and Reynolds number similarity criteria. The influences of the operation parameters on the level fluctuation in the pool using new metal delivery system was analyzed. 同时根据Fr和Re准数相似的原则,建立了双辊薄带连铸机的1∶1水模型,分析了不同连铸操作参数对液面波动的影响。
Based on the surface-fitting technique a precise correlation was obtained, which described the relationship among the two-phase multipliers, pressure, gas Froude number and Lockhart-Martinelli parameter. Such information is important for the development of condensate gas meter. 利用曲面拟合技术给出了能够准确表征槽式孔板两相压降倍率与压力、气体Froude数、LockhartMartinelli参数之间的相关式,为凝析天然气计量技术研究奠定了基础。
The relations among the length of the core region, the diffusion angle and the froude number and the submerged depth were also studied. 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。
How to improve the dissipation efficiency of the water flow with low Froude number is a key technical issue. 如何提高低弗氏数水流的消能率是关键技术问题。
The relationships for hydro-dynamic parameters ( Reynolds number, Froude number, resistance coefficient and flow velocity) of overland flow as a function of bed roughness, flow discharge and slope gradient were simulated by means of indoor fixed-bed resistance experiments. 在室内试验的基础上,采用定床阻力试验研究了坡面流水力学参数(雷诺数、佛汝德数、阻力系数和流速)随床面糙率、流量和坡度的变化规律。
In stratified atmosphere, a two-dimensional, non-hydrostatic model including topography is designed to be used to study the influence of Froude number on the flow over mountain. 本文建立了一个层结大气中二维过山气流模式,对层结大气的Froude数对过山气流的影响进行了数值研究,通过地形上空流场、位温场以及平行于山脉的风场的分析。
Furthermore, the Froude number and density Froude number of the flow in model and prototype should be the same. 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。
The relationships of hydrodynamic characteristics varied with attack angle, relative submergence and Froude number are illustrated. 本计算方法能显示二维兴波水翼水动力特性与Froude数、相对浸深和攻角的关系。
The results indicated that the diffusion and dilution of wastewater jet mainly depended on jet Froude Number, relative depth, and relative velocity. 试验结果表明:污水射流扩散和近区内的稀释度主要决定于射流佛劳德数、相对水深和相对流速。
The influence of Froude Number on the length and shape of vertical supercavity is analyzed. The change history of unsteady supercavity's length and shape are investigated when the wedges angel or cavitation number is changed in aperiodic time-dependence, especially in high-frequency impulse. 给出了Froude数对铅垂超空泡长度和形状的影响,以及楔角或空化数作非周期变化,特别是较高频率脉冲变化时,超空泡长度和形状的非定常变化过程。
Finally, the simple relationship between the concentration of pollutants and the intensity of atmospheric inversion, horizontal wind speed, Froude number and the stability parameter of the boundary layer is discussed. 讨论了兰州市山谷大气污染物浓度与大气逆温、水平风速、Froude数和边界层稳定度参数之间的简单关系。
At the same time, the uncertainty analysis of the form factor ( 1+ k), Froude number Fr and the break water resistance of this ship model is also analyzed and the analysis results are given. 文中还对该船模的形状因子(1+K)、佛鲁德数(Fr)以及破水阻力(R)进行了不确定度分析,并给出了分析的结果。
It has been found that the additonal friction factor λ z decreases with increasing Froude number Fr; 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;
The critical relation-curve between Reynolds number and the reciprocal of density Froude number for the vortex producing has been also given. 并给出了雷诺数和密度弗汝德数的倒数与产生漩涡的关系曲线。
The correlation between the width of eddy area around a pier and Froude number is obtained. 并得到了圆形墩柱两侧水流表层涡漩区宽度与弗汝德数的相关关系。
The solution is valid for arbitrary values of density ratio across the free interface and Froude number. 由于在线性化假定下计入了空气密度和重力的影响,本文结果可以适用於任意密度比和任意傅汝德数。
The volume of aeration was affected by the Froude number and the height of the cavity pocket at the back of the gate. 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。
Then some results of ventilated cavities considered the gravity effect around the disk are given. The influence of gravity effect on cavity shape and parameters in fluid field is analyzed. The gravity effect with different cavitation number σ and different Froude number Fr is also studied. 随后,研究了重力场作用下的绕圆盘通气空泡流,分析了重力场对于空泡形态及流场参数的影响,考察了不同空化数σ、不同弗罗德数Fr下的重力效应。