明輪輪葉 的英文怎麼說

中文拼音 [mínglúnlúnyè]
明輪輪葉 英文
paddle float
  • 明 : Ⅰ形容詞1 （明亮） bright; brilliant; light 2 （明白;清楚） clear; distinct 3 （公開;顯露在外;不隱...
  • 輪 : Ⅰ名1 （輪子） wheel 2 （像輪子的東西） wheel like object; ring; disc 3 （輪船） steamer; steamboa...
  1. Because of the technical complexity of the turbine for the three gorges project and on the basis of several important technical problems which have been defined in the international bidding documents for 14 generating units in the left bank power station, the owner of the project has decided another some important technical problems based on appraisal and comparison in the bid appraisal stage after the bidding documents are analyzed and the tender documents are cleared by the tenderers

    由於三峽工程水輪機技術上的復雜性和挑戰性，在左岸電站14臺機組國際招標文件已明確了若干重大技術問題的基礎上，在機組議評標階段，對招標文件進行分析和投標商對投標文件進行澄清說明后，經評議比選，業主又決策了幾個重大技術問題，主要有：水輪機設計水頭的確定，負傾角葉片水輪機的應用，兩套水力設計，舍棄初期轉輪，蝸殼進行水壓試驗等。
  2. A board on a paddle wheel

    明輪翼螺旋槳上的寬闊葉板
  3. 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。
  4. Further away, beyond the black trees, was the roof of something glistening with dew ; to the right was a great, leafy tree, with its trunk and branches brilliantly white, and above it the moon, almost full, in a clear, almost starless, spring sky

    在距離更遠的黑色的樹木後面，有一個被露水映照得閃閃發亮的屋頂，右面有一棵枝葉繁茂的樹乾和樹枝白得耀眼的大樹，一輪將近渾圓的皓月懸掛在大樹的上方，懸掛在明朗的幾乎看不見星星的春日的天空中。
  5. In the process of the investigatim, the author discovered a new type which the three leaves in the main stem are all verticillate, its appearance are quite different from the others in swertia genus. the results of rapd ( random amplified polymorphic dna ) analysis suggested it have obvious difference from the close relative species and it be a novel species

    酮酮在資源調查和標本採集中，發現一種植物主莖_ _沙十片均為三葉輪生，其形態與屬內其他種有明顯區別，並通過隨機擴增多態dna （ rapd ）分析，與近緣種比較差異明顯，故提出作為新種處理。
  6. Presents the model proposed for analyzing the vibration characteristics of shrouded blades and their calculation method by employing a wave propagation theory and modal synthesis technology coupled with a finite element method from the view point it is possible not only to conduct frequency modulation of the shrouded blades of a gas turbine, but also to utilize the friction effects between them to dissipate energy, thereby attaining the aim of vibration alleviation, as shrouded blades have been widely used in the design of high - speed turbomachinery, such as modern gas turbines and steam turbines, and with the shrouded blades forming an integral whole in a centrifugal force field, the vibration characteristics of the whole ring of blades are different from those of a single isolated blade, and this makes it essential to take into account the integral effect of blade shrouds, concludes from the calculation examples and engineering application that the above approach is valid and correct along with the possibility of considerably reducing the scale of calculation and analysis, and points out it is necessary to take into consideration the coupled effect of the whole ring of blades while the dynamic characteristics of shrouded blades is being analysed

    帶冠葉片不但能調頻，還可以利用葉冠之間的摩擦效應來耗散能量，達到減振的目的.帶冠葉片在離心力場中形成一整體，其整圈葉片振動特性不同於單個孤立葉片，需考慮葉冠的整體效應.利用帶冠葉片系統的循環對稱性，提出了採用波傳播理論和模態綜合技術，結合有限元方法研究燃氣輪機帶冠葉片振動特性的分析模型和計算方法.算例和工程應用證明了該方法是效性的、正確的，並可以大大降低計算分析規模.研究表明帶冠葉片動力特性分析時必須考慮整圈葉片的耦合效應
  7. Even by ten oclock, when the rostovs got out of their carriage before the chapel, the sultry air, the shouts of the street hawkers, the gay, light summer dresses of the crowd, the dusty leaves of the trees on the boulevard, the martial music and white trousers of the battalion marching by to parade, the rattle of the pavements, and the brilliant, hot sunshine, were all full of that summer languor, that content and discontent with the present, which is felt particularly vividly on a bright, hot day in town

    炎熱的空氣中，在小販的叫喊聲中，在身著鮮艷明亮的夏裝的人群中，在林蔭道的樹木落滿塵土的葉子上，在一營前去換防的軍隊的軍樂聲中以及他們的白色的長褲上，在馬路上轔轔的車輪聲中，在炎熱的太陽刺目的照耀下，一切都令人感到炎夏的疲倦。在城中晴朗炎熱的日子里，對現狀滿意和不滿意的感覺顯得特別強烈。
  8. Cracking failure of centrifugal compressor ' s impellers was analyzed, the welding craters in the impellers led to stress concentration. the unsteady gas flow accelerated the development of cracks in the impeller

    摘要針對某石化公司離心壓縮機葉輪多次發生開裂、掉塊等故障以及裂紋形成機理進行了分析。分析結果表明了葉輪開裂原因系疲勞開裂，葉輪焊接缺陷產生了焊接弧坑，造成表面應力集中，氣流激振加速了裂紋擴展。
  9. The conclusions were as follows : 1. the micromorphological characters of leaf epidermis of s. buxifoliwn were examined by lm and sem

    研究結果表明： 1在光鏡下和電鏡下的赤楠葉表皮特徵與同屬形態相近的輪葉蒲桃syzygiumgrijsii ，有較大差異。
  10. After the studies about the height and leaves number structure by use statistic methods we know that the distribution curves of height is not fit the normal distribution while the leaves number distribution is

    應用種群統計學的分析方法，對種群的高度、輪葉數的結構進行了分析，結果說明，高度的分佈不是典型的正態分佈，而輪葉數的分佈為正態分佈。
  11. The result indicates that the maximum stress on the runner is mainly in proportion to the turbine output

    結果表明在大部分工況下該轉輪葉片最大靜應力基本上與水輪機功率成線性關系。
  12. Abstract : this paper uses the topology theory to analyze the surface flow spectrums of straight, positively curved and negatively curved cascades with relative tip clearances of 0. 023 and 0. 036, finds apparent differences of topology and vortex structures in the blade tip and the suction side wall corner of single type of cascade with this two clearances, and studies the mechanism of the difference formation as well as their effects on the energy loss

    文摘:應用拓撲原理分析了葉頂相對間隙為0 . 023和0 . 036的渦輪直葉柵和正、反彎葉柵的壁面流譜，發現在兩種間隙下同類葉柵的拓撲與旋渦結構在葉頂和吸力面壁角明顯不同，探討了差別形成的機理及其對能量損失的影響
  13. The result indicates that the dynamic stress caused by hydraulic pulse at partial load is one of the important reason of the fatigue and cracks of the runner

    結果表明由於水壓力脈動引起的轉輪葉片上的振動交變動應力是混流式水輪機疲勞破壞的主要原因之一。
  14. The result of the calculation for tip clearance is reasonable when it is compared with theory. two ways are put forward for convention of dimension of the turbine components from high temperature to low one, which is related with tip clearance, a simple example is used to illuminate that the two ways are useful, using the method of design optimization, axiisk and a blade of a certain turhine is analysed, it showes that the method of design optimization is feasible to be used for convertion of dimension of the turbine components. finally, ansys software is used to analyzed the variation of tip clearance with the method of cyclic symmetry analysis when engine works under the conditions of temperature and rotational speed, am using a new method to deal with thermal contact resistance in the calculation

    本文完善了計算渦輪葉尖間隙的簡化演算法程序，增加了程序的計算功能，並將其應用於某高壓渦輪進行葉尖間隙分析，所得結果與理論結果進行了對比，得出修改後的程序用於葉尖間隙計算是合理的；同時提出了與葉尖間隙相關的渦輪典型部件的冷、熱態的尺寸兩種換算方法，使用優化設計的方法進行了實例分析，說明了所提出的計算方法是可行的；最後應用ansys有限元軟體利用循環對稱的方法分析了某型發動機高壓渦輪在溫度場及離心力作用下的葉尖間隙在發動機工作過程中變化情況，並分析了計算中的接觸熱阻的處理問題。
  15. Cracking reasons of the turbine runner are extensive. the fact shows that the leading reason induced cracking is exorbitant stress

    水輪機葉片開裂的原因是多方面的，實踐表明:應力過高是導致轉輪葉片開裂最為主要的原因。
  16. Researches show that high dynamic stress caused by hydraulic loads is the most important reason of the fatigue and cracks of the runner

    研究表明，水力激勵引起的混流式水輪機轉輪葉片動應力是引起葉片疲勞破壞的主要原因之一。
  17. The reconstruction project of turbomachinery gets significant social benefits and economical benefits according to the in - situ tests results

    根據轉輪葉片切邊后現場驗證試驗結果分析，水輪機的增容改造取得了明顯的經濟效益和社會效益。
  18. The consequence of computation indicated above method not only can approach turbine blade surface accurately but also can be provided for extend and intersection while the precision can be controlled. it realized anticipated goals of the application of turbine blade and engineering exercises. thus, it provide the foundation to the reconstruct and optimize design of turbine blade as well as the cam of turbine blade

    算例結果表明，上述方法不僅可精確擬合混流式、軸流式水輪機轉輪葉片，而且還能對葉片進行求交、延展運算並控制精度，實現了nurbs曲面造型技術應用於水輪機葉片設計和工程實際的預期目標，為水輪機葉片的改型設計和優化設計、水輪機葉片的計算機輔助製造打下了基礎。
  19. A parameter has been defined to account for both the heat transfer enhancement and pressure loss caused by different shapes and configuration of pin fin arrays and the optimization analysis shows that cube - shaped pin - fin arrays can be viable alternatives for pedestal cooling in a blade trailing edge

    本文提出了一個強化換熱有效性系數來綜合考慮擾流柱換熱和壓力損失的效果，並用它對各種擾流柱進行了優化分析，優化結果表明方形擾流柱排在渦輪葉片尾緣區冷卻結構設計中是優先考慮的一種結構型式。
  20. Studies have shown, lead impeller nozzle it forms the hole to be equal to size of the nozzle, gush out from light, difficult to arrange bits and realize it cut one layer of advantages effectively ; under the equal condition, rotate the nozzle by oneself, can be designed in accordance with the actual need while vary the size of aperture of hole, gush out the distance longer effectively, it is apt to give play to the role of its pulse broken rock

    以此設計出限速部分的參數，且初步討論射流功率與轉速之間的關系。研究表明，內導葉輪噴頭形成鉆孔孔徑與噴頭大小相當，有效噴距小，不易排屑和實現其切向剝層優勢；同等條件下，自旋轉噴頭，成孔孔徑大小可依實際需要設計，有效噴距較長，易於發揮其脈沖破巖作用。
分享友人
分享到 Line

分享到臉書