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水力     
相关语句
  hydraulic
    Study on the Theory and Application in Hydraulic Computation of the Lattice Boltzmann Method
    Lattice Boltzmann方法的理论及其在水力计算中应用的研究
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    Study on the Hydraulic Characteristics of Plug Energy Dissipater
    洞塞式内流消能工的水力特性研究
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    Hydraulic Design of Outline of Controlling Structures for Rapid Flow
    控制急流结构的水力设计
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    Influence of The Weir Height on the Hydraulic Characteristics of the WES Weir
    堰高对WES堰水力特性的影响
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    Reliability Analysis on Capacity of Weir or Sluice-Open Channel Hydraulic System
    堰闸—明渠水力系统过流能力的可靠性分析
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更多       
  the hydraulic
    Study on the Hydraulic Characteristics of Plug Energy Dissipater
    洞塞式内流消能工的水力特性研究
短句来源
    Influence of The Weir Height on the Hydraulic Characteristics of the WES Weir
    堰高对WES堰水力特性的影响
短句来源
    The Hydraulic Theory for Diffusion of Supercritical Flow and the Practice of the Hydraulic Engineering
    闸下急流扩散的水力理论和工程实践
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    STUDY ON THE HYDRAULIC TEST OF SPILLWAY IN THE BIG RIVER CONSTRVCTIONS
    大河枢纽溢洪道水力试验研究
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    THE HYDRAULIC CHARACTERISTIC OF SKEW WEIRS
    斜交堰的水力特性
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  hydraulic power
    Discussion on calculation of hydraulic power in fixing pipe with time-delay and self-closing valve
    装设延时自闭阀管道的水力计算探讨
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    Investigation of clear water field of a turbid water hydraulic power separation equipment by PIV
    应用PIV技术测试浑水水力分离清水装置的清水流场流动特性
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    Optimization Experiment of Turbid Water Hydraulic Power Separation Equipment
    浑水水力分离清水装置的优化试验研究
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    Investigation of Clear Water Field of a Turbid Water Hydraulic Power Separation Equipment by Physical Model
    “浑水水力分离清水装置”清水流场试验研究
短句来源
    The Experiment Research of Clear Water Field Characteristics of a Turbid Water Hydraulic Power Separation Equipment
    浑水水力分离清水装置清水流场特性试验研究
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更多       
  a hydraulic
    This paper presents a hydraulic design method of the vacuum crest shape and the curved bucket shape with uniform pressure distribution for high-head spillways.
    本文给出了高水头溢流坝面负压坝顶曲线及等压反弧曲线的水力设计方法。
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    This paper summarizes the investigation of the characteristics of turbulent flow on a hydraulic spillway and the configuration optimization for a hydraulic spillway structure,and presents the problems to be studied and the trend to be studied later.
    系统地总结了水工泄水建筑物紊流水力特性数值模拟研究的现有成果,提出了有待进一步解决的问题和今后的研究趋势。
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    A method is advanced to distinguish the flow pattern between free outflow of the closed culvert behind gate, submerged discharge and pressure conduit flow. A hydraulic calculation formula is also deduced, which can be adopted by other similar projects.
    通过试验提出了闸后暗涵自由出流、淹没出流以及有压管流流态的判别方法 ,提出了相应的水力计算公式 ,可供工程采用
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    The matrix representation for pump transmission characteristics was well understood in steady oscilliation, but less understood for flow pressure and flow rate of a hydraulic circuit. The author presented a theoretical and experimental study on pump transmission characteristics of a system including a rotation system of shaft as well as hydraulic circuit.
    所叙述的水泵传递特性理论与实验研究,传递系统除水压和流量特性之外,还包含了水泵转轴的转动力矩和转动速度特性,从而较为完整地表现包含水力与动力两方面的水泵总体特性。
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  hydraulic
Variations of root hydraulic conductance of Fraxinus mandshurica seedlings in different concentrations of NH4NO3 solution
      
The root hydraulic conductance (LP) determined by radical water transport inside the root is a major influence on the shoot water status, plant growth, and development.
      
A piezoelectric actuated prestage driver of hydraulic servo valves for the low-frequency response of electrohydraulic servo valve electromagnetic prestage driver was presented.
      
A new pipe rupture valve for hydraulic elevator is designed.
      
Mathematical models established for the hydraulic elevator system are used in numerical simulations on the Simulink environment of Matlab kits.
      
更多          
  the hydraulic
Mathematical models established for the hydraulic elevator system are used in numerical simulations on the Simulink environment of Matlab kits.
      
The effects of different viscous damping diameters, inlet pressures of pipe rupture valve, and elevator loads on the hydraulic elevator system's dynamic performance are analyzed.
      
The hydraulic loss characteristics are determined and analyzed.
      
The methods deducing the hydraulic losses are investigated.
      
Compared with a circular pipe, the hydraulic losses of a divergent discharge passage are smaller and the pump assembly efficiency is 10%-30% higher.
      
更多          
  hydraulic power
At the maximal output of hydraulic power, the flow rate reached 5 L/min against an afterload of 100 mmHg.
      
The hydraulic power is used for locomotion, and the electric power is used for the control computer, sensors and other peripherals.
      
This HEPU produces constant pressure hydraulic power and constant voltage electric power.
      
The prototype power unit weighs 27 kg and produces 2.3 kW (3.0 hp) hydraulic power at 6.9 MPa (1000 p.s.i.) and 220 W of electric power at 15 V DC.
      
Dynamic characteristics of hydraulic power steering system with accumulator in load-haul-dump vehicle
      
更多          
  a hydraulic
Experimental research is also carried out using a hydraulic elevator experiment rig.
      
To study its riding performance and reclaiming energy performance, a hydraulic energy reclaiming device prototype is produced and its mechanical behavior is analyzed and tested according to the hydraulic theory.
      
The wall-climbing mobile platform (MP) of a robot for repairing a hydraulic turbine blade onsite is developed.
      
The platform can automatically adapt to complex spatial surfaces, which satisfy the requirements of a hydraulic turbine blade in-situ repair robot.
      
Consideration is given to a structural change in the diagram of a hydraulic circuit by way of a sequential exclusion of branches (edges) of the graph, which does not lead to its decomposition.
      
更多          
  其他


According to the basic equations derived under the two assumptions by Harold Lauffer—(1) the energy head of every point of a vertical section remains constant,(2) the flow lines are concentric circular arcs,this paper qives a comprehensive deduction of curvature effect in the characteristics of free overflow of round-crested spillway.118 runs of experiments of three round-crested spillway models of different size have been conducted by the author.The experimental results check the derived equations basically.Some...

According to the basic equations derived under the two assumptions by Harold Lauffer—(1) the energy head of every point of a vertical section remains constant,(2) the flow lines are concentric circular arcs,this paper qives a comprehensive deduction of curvature effect in the characteristics of free overflow of round-crested spillway.118 runs of experiments of three round-crested spillway models of different size have been conducted by the author.The experimental results check the derived equations basically.Some empirical equations have been prepared to facilitate the application of experimental data.The discharge coefficients of free overflow of 27 different profiles of 16 practical spillways obtained by model tests have also been collected to verify the curvature effect equatiohs given by this paper Their practical agreement is also acquired.

本文根据劳弗尔(H.Lauffer)氏在两项假定[(1)垂直测线上各点所含能量为常数,(2)流线呈同心圆弧]下所导得的基本公式,作了详细的补充引伸,得出圆顶壩自由溢流时各项水力特性中的曲率影响计算公式。作者曾进行了大、中、小三个圆顶壩模型的试验共118组,试验成果基本上和导得的计算公式相合致。文中并根据试验资料制定了一些经验公式,应用时可更简便。此外,也曾搜集了16个实用溢流壩包括27种断面曲线形式的流量系数模型试验资料,来验证流量系数所受的曲率影响,基本上也相符合。

~~

在模型试验实践中,发现满流输水道自由出流时,出口尾段压力分布不循一般规律,顶部发生大片负压。负压问题在大直径输水道中影响工程安全;对低水头大隧洞,它还涉及有效水头的准确计算;此外,管道出口段的水力因素变化规律,迄今仍是管道水力学中的一个空白点。本文便是针对这些问题所作系统试验研究的一个综合报导。试验主要在15公分圆管中进行。试验成果,并在三种不同管径不同材料的圆管中进行校核。试验中取水流傅氏数和出水条件作为主要变量;着重研究了不同出口边界条件对出口断面压力分布和出口段压坡的影响;对有效水头计算方法、管顶负压消除措施,提供了具体建议。文中并对自由出水的出口段压力分布作了初步理论分析,计算结果与实测资料颇称吻合。

A seale model investigation of surface runoff hydrographs for a small watershed with impermeable surface was carried out in a indoor laboratory. Hydrographs at the watershed outlet due to rainfalls of difforent durations and intensities were obtained experimentally. These results were used to check the unitgraph theory.The findings derived from experimental data are: 1.The duration of surface runoff for all uniform-intonsity storms of the same length is not constant,but somewhat varies with the intensity of...

A seale model investigation of surface runoff hydrographs for a small watershed with impermeable surface was carried out in a indoor laboratory. Hydrographs at the watershed outlet due to rainfalls of difforent durations and intensities were obtained experimentally. These results were used to check the unitgraph theory.The findings derived from experimental data are: 1.The duration of surface runoff for all uniform-intonsity storms of the same length is not constant,but somewhat varies with the intensity of rainfall. 2.In cases,the rainfall duration is equal or longer than the time of concentration of the watershed,the configuration of unitgraphs remain unchanged in essential char- acteristics. 3.In cases,the rainfall duration is shorter than the time of concentration,the re- sultant unitgraphs are not similar in configuration;the unitgraph theory is not verified. 4.The stale model experiment method for hydrological investigation,although far from perfect in hydraulic simulation and experimental technique,is considered as a new and fruitful approach for further efforts.

为了研究表面径流过程线,我们采用一座象小流域表面不透水的比例模型,建造在室内实验室里。自记水位计安放在流域的出口处,合适地以不同的降雨历时和强度做试验,这种结果用来检验单位线理论。从试验的资料推论发现:1.所有一定强度的暴雨,地面径流历时的长短不是不变的,但是随降讯强度的变化不大。2.在降雨时间等于或大于流域的汇流时间的情况下,单位线的形状存在基本上不变的特征。3.在降雨时间短于汇流时间的情况下,结果单位线的形状不相似,单位线的理论不成立。4.为水文研究比例模型试验的方法,虽然在水力相似和试验技术不十分成熟,是新的事物,有待今后更进一步的努力。

 
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