francis turbine 中文意思是什麼

francis turbine 解釋
法蘭喂式水輪機
  • francis : n. 弗朗西斯〈男子名〉。
  • turbine : n 【機械工程】（渦）輪機，葉輪機，汽輪機，透平機。 a hydraulic [water] turbine 水輪機。 a steam t...
  1. Many large capacity turbine runners in commercial running have come to cracks or vibration problems with different extent in china. therefore, to ensure the large francis turbines running safely and stably is an important issue on design and type selection research

    在我國陸續投運的大型水輪機轉輪相繼不同程度地出現振動與裂紋，因此，保證大型混流式水輪機的安全穩定運行就成為設計選型研究的重要問題。
  2. The welding technology of francis turbine runners is optimized from the view of subsection welding and local heating by numerical simulation. the result shows that welding residual tensile stress appears in the weld and its area nearby, and peak stress appears in the dangerous area of blades after practising quondam welding technology ; welding residual tensile peak stress in the dangerous area of blades can be decreased by welding both ends earlier and then welding middle section later during subsection welding, and decreasing effect on welding residual stress of the subsection welding is related to the weld length of blade outlets and welding direction of each subsection ; decreasing effect on residual stress of the local heating is direct proportional to heating time, heating temperature, heating area, and inversely proportional to cooling area, and welding residual tensile peak stress in the dangerous area is decreasing trend earlier, and then increasing trend later with heated location increased

    本文利用數值模擬手段對轉輪的焊接工藝從分段焊和局部加熱兩個方面進行了優化，結果表明:採用普通工藝焊接時，葉片焊后殘余拉應力出現在焊縫及其附近區域，並且在葉片出水邊的熔合線附近（危險區域）出現了峰值;在採用優化的分段焊時，先焊兩端后焊中間的方法可以降低葉片危險區域的焊接殘余拉應力峰值，降低效果與葉片出水邊焊段長度、焊縫各段的焊接方向有關;局部加熱法降低轉輪危險區域殘余應力的效果主要與加熱時間、加熱溫度以及加熱面積成正比，與冷卻面積成反比，並且危險區域的殘余應力隨加熱區域的增大呈先降低后升高的趨勢。
  3. Francis turbine is applicable for the middle and low water level power station, both have vertical and horizontal structure, and commonly designed in the scroll

    混流式水輪機用於中、低水頭電站，有臥式、立式兩種，一般採用金屬蝸殼。
  4. In chapter 3, the subgrid eddy - viscosity model for large eddy simulation is applied to calculate the three dimensions unsteady periodic turbulent flow in yantan francis turbine. the pulsating characteristics of some main physical parameters in flow field are found. the calculated axial water thrust of hydraulic turbine agrees with the model - test value

    第三章採用大渦模擬亞格子渦粘模型，對巖灘混流式水輪機的流場進行三維非定常湍流分析，得到了流場中各物理量的脈動特性，計算出ms的軸向水推力與模型試驗值大小相當；同時論證了對于下機架承重的混流式水輪發電機組可採用其推力軸承負荷作為水電站廠房振動的最大垂直激振荷載。
  5. Francis turbine generator set

    水斗式水輪發電機組
  6. Strength and vibration analysis of a francis turbine

    混流式轉輪靜強度和振動特性分析
  7. Numerical prediction of pressure fluctuation within francis turbine for large - eddy simulation

    基於大渦模型水輪機壓力脈動的數值預測
  8. The paper makes simulation for each type of electro - hydraulic regulating system of turbine. the results of simulation show that for the francis and kaplan turbines the contradiction between regulation time and pressure increasing can be solved by logical chosen of feedback adjustment coefficient and control cost - weighting matrix. for tublar turbine the dynamic matrix pi control scheme can effectively solves the difficulty of speed stabling of this type turbine

    本文對各種機組調節系統進行模擬，結果表明，對于混流式和軸流轉漿式機組，通過反饋校正系數和控制權矩陣的正確選擇，可以解決調節時間和水擊壓力上升的矛盾；對于貫流式機組，提出了動態矩陣pi控制方案，可以較好的解決此類機組轉速難以穩定的問題。
  9. Francis turbine generator set of both vertical and horizontal types are suitable for water head from 10m to 300m. its feature is that the water flow enters the runner inward in a radial direction, changes direction gradually and then passes out axially

    水斗式水輪發電機組適用於水頭80 ~ 800米，是利用水流動能沖擊水輪機轉輪旋轉作功，且其噴嘴的射流中心與轉輪在同一平面上。
  10. Crown and band castings for francis turbine welded runner

    混流式水輪機焊接轉輪上冠下環鑄件
  11. Numerical realization of francis turbine blade design and wooden patterns

    混流式水輪機葉片設計與木模圖的數值實現
  12. Technological guide for erection and welding of split runner of francis turbine

    混流式水輪機分瓣轉輪組裝焊接.工藝導則
  13. Analysis of the destruction of the francis turbine draft tube inner side of dongjiang power plant

    東江電廠水輪機尾水管里襯破壞原因初探
  14. Cracks in francis turbine runner blades threaten the safety, stability and economic profits of the hydropower station

    摘要混流式水輪機轉輪葉片裂紋故障嚴重影響了水電站的安全穩定運行和經濟效益的發揮。
  15. Study on optimal design of francis and kaplan hydraulic turbine in sandy water

    含沙水中混流和軸流式水輪機優化設計研究
  16. Quality control in the process of assembling and jointing have interrupted francis turbine at lijiaxia hydropower station

    李家峽水電站混流式水輪機分瓣轉輪組合與焊接過程中的質量控制
  17. Secondly, it realized the whole structure of francis turbine blade surface. thirdly, it accomplished the computation of blade incidence

    第三，針對水輪機葉片的特點，完成了各圓柱面葉柵進口安放角的求解演算法。
  18. This paper deals with a lump - sum flow analysis of a spiral case, stay ring and vaneless annular walls for a small francis turbine by the latest cfd code

    本文對常用的小型混流式水輪機渦殼、座環和無導葉環壁面內流動狀況用最新的cfd技術進行了整體數值解析。
  19. Through the study on the large francis turbine parameters selection, it gives a definite instruction in runner parameters alternative selection with the same head, and also practices an important role for laxiwa turbine calling for bid

    通過對大型混流式水輪機參數選擇的研究，對同水頭段的轉輪參數選擇比較具有一定的指導意義，同時對拉西瓦水輪機在招標設計工作中具有重要的實際意義。
  20. As for the francis turbine, this paper generalizes the characteristics of complete characteristic curve nonlinear model and internal character analysis nonlinear model

    針對混流式水輪機，歸納分析了常用的全特性曲線的非線性模型、基於內特性解析的非線性模型的特點。
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