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大单宽流量     
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  large per unit width discharge
     The prototype observation results have been obtained on the basis of the systematic test and research as well as of application of the design study results in the design and construction of the dam, taking into account the design optimization and construction of the Dachaoshan hydropower project in the study, and thus a new successful living example of constructing a RCC dam with a height of over 100m and a large per unit width discharge has been provided. 
     本研究结合大朝山水电站的建设,从设计优化构想、开展了系统的试验研究,并把设计研究成果应用于大坝的设计和施工,取得了原型观测成果,提供了百米级以上高坝、大单宽流量RCC坝的新的成功实例。
短句来源
     These observation results have provided very important scientific basis for wide application of the flaring pier stepped dam face under the design condition of a high dam and a large per unit width discharge. 
     本观测成果为在推广宽尾墩阶梯式坝面在高坝大单宽流量的设计条件下的应用提供了非常重要的科学依据。
短句来源
  large discharge per unit width
     Study on river diversion and erosion control under condition of narrow river bed, large discharge per unit width, depth overburden layer
     狭窄河床大单宽流量深覆盖层施工导流消能防冲研究
短句来源
     The paper compares the measures of dissipation and erosion control, protection of cofferdam, puts forward the comprehensive measures of river bottom protection by block stone, dissipation by tetrahedron block for resolve the technique problem of dissipation for tunnel exit and softy of downstream cofferdam under conditions of narrow river bed, large discharge per unit width, depth overburden layer.
     文章对下游河道消能防冲和围堰保护措施进行了比较研究,提出了采用开挖块石护底、混凝土四面体二次消能的综合措施,解决了狭窄河床、大单宽流量、深覆盖层、地质条件差的导流洞出口消能防护和下游围堰安全的技术难题。
短句来源
  large-unite discharge
     Research and Test for Energy Dissipation Form of Low Head,Large-unite Discharge Flood Discharging
     低水头、大单宽流量泄洪消能方式研究
短句来源
  “大单宽流量”译为未确定词的双语例句
     Characteristics and Effect of Energy Dissipation of Water Flowin Large Unit Width Discharge of Stepped Spillway
     阶梯溢洪道大单宽流量的水流特性及消能效果
短句来源
     By testing, the author has verified the calculation methon method proposed in the article "The Spread of Rapid Flow on the Surface of the Circular Arc" and advanced the relations of the maximum discharge per meter on the end of the bucket with factors of φ, H/R, b/R, F.
     本文对"圆弧曲面上急流的扩散"一文中提出的计算方法进行了试验的验证,提出了在挑坎末端最大单宽流量值与φ、H/R、b/R、F的关系.
短句来源
     Selection of Energy Dissipators With large Unit Discharge
     大单宽流量消能工的选择
短句来源
     The Xianghiaba hydroelectric project has a maximum dam height of 161m check flood discharge of 49 000 m3 s and a typical flood discharge dissipation structure with high head large unit discharge and high silt content.
     向家坝水电站最大坝高161m,校核洪水下泄流量约49000m3s,其泄洪消能建筑物是典型的高水头、大单宽流量、大泄洪功率、高含沙率泄洪工程。
短句来源
     A new type of stilling basin with step-down floor for enhancing the energy dissipation of hydraulic jump in Xiangiaba Project is studied in model test.
     本文以向家坝高水头大单宽流量水电站为例,对旨在降低消力池临底水力学指标的跌坎型底流消力池进行了系列水工模型试验,研究了不同跌坎高度的消力池水力学特性。
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    The design criteria for protecting a spillway surface from cavitation erosion are discussed. The spillway profile first of equal cavitation number and then of equal safety pressure are analyzed, and two corresponding curves for the protecting purpose obtained. Although the fundamental equations derived for their expressions come to be identical, the constants contained therein are different. A numerical integration method for solving the equations is given, which simple in form gives accurate results, and is...

    The design criteria for protecting a spillway surface from cavitation erosion are discussed. The spillway profile first of equal cavitation number and then of equal safety pressure are analyzed, and two corresponding curves for the protecting purpose obtained. Although the fundamental equations derived for their expressions come to be identical, the constants contained therein are different. A numerical integration method for solving the equations is given, which simple in form gives accurate results, and is expected to be common in use for calculating spillway profiles.Finally, demonstrative calculations are made for two actual spillway profiles, both of high dams. Evidently, the profiles calculated are very effective even with large unit-width overflow discharges in avoiding erosion from cavitation, because the cavitation number of the overflow can be raised by 40~49% and the effective drop of head diminished by 24~40% by the profiles.

    本文对溢流面减蚀体型的设计准则进行了探讨.对等空穴数及等安全压力两种减蚀概念的体型进行了分析,得到了两类减蚀体型曲线,但其基本方程的形式却完全相同,只是其中的设计常数不同.文中提出的数值积分法精度较高,计算简便,可期具有一定的普遍适用意义.文末对两项大型工程的泄水建筑物所作的分析计算表明:在大单宽流量下减蚀曲线的效果显著,空穴数可提高40~69%左右,有效落差可降低24~40%.

    By testing, the author has verified the calculation methon method proposed in the article "The Spread of Rapid Flow on the Surface of the Circular Arc" and advanced the relations of the maximum discharge per meter on the end of the bucket with factors of φ, H/R, b/R, F. Besides, the plane form of diversion walls and the expanding angle have been discussed while diversion walls were set upon on the bueket.

    本文对"圆弧曲面上急流的扩散"一文中提出的计算方法进行了试验的验证,提出了在挑坎末端最大单宽流量值与φ、H/R、b/R、F的关系.此外,当挑流鼻坎上设置了导墙时,论述了导墙的平面形态和扩散角.

    How to evaluate the efficiency of energy dissipation still is an unsolved problem, especially for 3-dimensional flow. In this paper are suggested three design criteria of energy dissipation, i.e. rate of energy dissipation, ratio of max. discharge per unit width at downstream end of apron to that just at gate section and the vertical velocity distribution factor. By analyzing data from a lot of hydraulic modeling, it is found that the rate of energy dissipation for 3-dimensional flow is 15% greater than for...

    How to evaluate the efficiency of energy dissipation still is an unsolved problem, especially for 3-dimensional flow. In this paper are suggested three design criteria of energy dissipation, i.e. rate of energy dissipation, ratio of max. discharge per unit width at downstream end of apron to that just at gate section and the vertical velocity distribution factor. By analyzing data from a lot of hydraulic modeling, it is found that the rate of energy dissipation for 3-dimensional flow is 15% greater than for 2-dimensional flow and keeps a good relationship with Froude Nunmber at section before hydraulic jump. The laterally flow expanding is another important process of energy dissipation, which has been verified both theoretically and experimentally.

    如何评价闸坝下游的消能效果,尤其是三元流情况下的消能效果仍是一个没有解决的问题。本文建议供设计时采用的三个消能指标:消能率,闸门开启时护坦下游端的最大单宽流量与闸孔最大单宽流量之比,垂直流速分布系数。根据大量模型试验资料分析,认为三元流的消能效果比二元流高15%,并与佛劳德数有良好的相关关系。理论和实践都证明,横向水流扩散亦是一种重要的消能过程。

     
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