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- Hydraulic head loss 水头损失
- The course contains hydrostatics, hydrodynamics, head loss and related hydraulics calculation, some special hydraulic problems and measurement of hydraulics factors. 主要讲授水静力学、水动力学基础、水头损失及有关水力计算、若干特殊的水力问题、水力要素的量测。
- The results indicate that orifice efficient water head is total water head and is not hydraulic head for uniform discharge along porous pipe. 结果表明,对沿途均匀泄流管道来说,其作用水头不能仅以压头为计算依据,而应以总水头为准。
- The definition of the performance measurement function is the average hydraulic head and root mean square error hydraulic head in the homogenous problem. 在均质问题中,定义执行度量函数为模拟水位平均值、模拟水位与观测水位平均值之均方根差值。
- Chiu and Seman(1971)studied the head loss of flows transporting sediment in circular and square pipes with spiraling motion. 邱和思门(1971)研究了在圆管和方形管中输沙时具有螺旋运动的水流的水头损失问题。
- While groundwater flows through an unconfined aquifer due to heterogeneity, the vertical average saturated hydraulic conductivity is a function of hydraulic head. 地下水流于非拘限含水层流动时,因含水层之非均质性,使得垂直平均之饱和水力传导系数随地下水水位高低而变化。
- The critical velocity and the head loss gradient of slurry pipelines are important design parameters. 临界速度和水头损失坡降是浆体输送管道的重要设计参数。
- Hydraulic head pressure forecasting of water gushing for deep-lying Karst tunnel is of importance in engineering practice and the former evaluating methods is too rough. 摘要深埋隧道涌水最大水头压力的预测具有重要的实际意义。
- Flow regime and head loss of two different tailrace systems in hydropower station were investigated. 对两种不同的尾水系统布置方式进行了流态和水头损失的对比分析。
- Unique design features in the 1710 Series give improved flow measurement accuracy as well as a lower head loss characteristic compared to other valves. 与其它结构平衡阀相比,1710系列平衡阀独特的结构,改善了流量测量的精确度,减少了压头损失。
- Unique design features in the 1710 give improved flow measurement accuracy as well as a lower head loss characteristic compared to other valves. 与其它阀门相比,1710独特的结构特征能够改善流量的量测精度,减少压力损失。
- About energy economization, mainly introduced how new technologies and methods are used in utilizing of hydraulic head, decreasing pressure and quantity, setting of fire-fighting system, water pump, supplying of hot water etc. 关于节能,主要介绍了在给水管网水头的利用方面,减压节流问题方面,生活与消防系统设置方面,水泵方面,开水供应方面的节能新方法、新技术。
- A heat exchanger pipe with continuous helical baffles was proposed.Pressure distribution and head loss of the heat exchanger pipe were calculated. 摘要提出了一种连续螺旋折流板换热管,对其内部流场进行了数值模拟,并进行了物理模型实验验证。
- The conflict of head loss development and effluent quality decline should be fully considered in determining backwashing parameters. 好气滤池的反冲洗应综合考虑反冲洗后滤池出水水质下降和水头损失恢复之间的矛盾。
- Groundwater runoff is the subsurface flow which flows from highhydraulic head to low hydraulic head in rock medium.It streams throughcommunicating interstices of fractured zones mostly. 地下径流是岩石介质中由水头高处向水头低处流动的地下水流,它主要通过断裂带等连通的空隙流动。
- Based on the combination of the theoretical analysis and flume experiment, the local head loss associated with pile permeable groins is discussed. 为此,结合理论分析和水槽试验对其局部水头损失进行探讨。
- But water head loss of filter for aluminium sulphate polysilicate application will grow quicker than that for aluminium sulphate . 残留的铝含量降低,而残留硅的含量没有增加,但投加聚硅硫酸铝会导致滤池水头损失增加。
- The water head loss is low. When water flow through 0.9m-thick zeolite, flow rate is 2.6m/h, 4.2 m/h, 7.4 m/h, and the water head loss is 3-5cm,8-12cm,and 15-20cm, respectively. 沸石具有很好的通透性,水流通过0.;9米厚的交换层时,2
- Based on an experiment of head loss for long-throated flume, the flaw of water head loss calculating formula which based on the theory of boundary layer is pointed out. 在实验的基础上,指出对用边界层理论计算长喉槽水头损失公式的缺陷,分析了局部水头损失产生的机理,补充了进口侧收缩水头损失的计算,对原公式进行修正提高计量精度
- Hydraulic heads at the geothermal wells reflect a flow trend from south to north of thermal groundwater in the Wumishan Group due to the obstructing of the Huangzhuang-Gaoliying fault. 地热井水头分布趋势反映雾迷山组白云岩热储地下热水受黄庄-高丽营断裂阻隔后由南向北方向径流。