預旋 的英文怎麼說

中文拼音 [yùxuán]
預旋 英文
prerotation
  • 預 : Ⅰ副詞（預先; 事先） in advance; beforehand Ⅱ動詞（參與） take part in
  • 旋 : 旋Ⅰ動詞1 （旋轉） whirl 2 （用車床切削或用刀子轉著圈地削） turn sth on a lathe; lathe; pare Ⅱ名詞...
  1. The advantage and disadvantage of measurement of propeller - induced pressure by using different equipment is discussed. the method to obtain self - propulsion point for full scale in depressurized towing tank is studied. the measurements of pressure of two propeller models are carried out, the results of the measurement agree with those obtained by cavitation tunnel very well, which proves this measurement is successful, and the theoretical prediction is verified too

    比較了不同測試設備用於螺旋槳脈動壓力測試的優缺點，探討了在減壓拖曳水池中實現實船自航點的方法，並進行了兩只螺旋槳模型的脈動壓力測試，經與空泡水洞中脈動壓力的測試結果進行比較，說明該項測試是成功的，同時也對脈動壓力的理論預報結果做了驗證。
  2. Accurate load forecasting is helpful to planning generators " starting and stopping in the interior of the electrical networks economically and reasonably, preserving the security and stability of power system, reducing the unnecessary circumvolving repertory capacity, making planning to overhaul the units in reason, ensuring the normal production and life of the society, effectively reducing the cost of generating electricity, increasing the economical and social benefit

    電力負荷預測是供電部門的重要工作之一，準確的負荷預測，可以經濟合理地安排電網內部發電機的啟停，保持電網運行的安全穩定性，減少不必要的旋轉儲備容量，合理安排機組檢修計劃，保證社會的正常生產和生活，有效地降低發電成本，提高經濟效益和社會效益。
  3. Clinical study of prevention of fat embolism syndrome with dextran 40 and dexamethasone in patients with fractures

    低分子右旋糖酐加地塞米松預防脂肪栓塞綜合征的臨床研究
  4. Adopted unique ventilation system and rotational direct current motor stabilize the hot airflow

    採用獨特的導風系統及旋轉式直流電機，恆定預熱風量。
  5. Tropical cyclone glenda, the second destructive storm to hit australia in 10 days, had earlier forced the evacuation of hundreds of people in larger towns, shut down oil and gas rigs and disrupted iron ore shipments in the region. meteorologists said the eye of the cyclone passed over the town of onslow, 1, 390 km 860 miles north of the western australia state capital of perth, at 9 p. m. local time

    以及鐵砂礦開采作業已經停止預計這股熱帶氣旋將在未來幾小時之內到達位於澳洲西南海濱度假城市珀斯以北950英里約合1520公里的卡拉瑟市karratha以及澳洲西部擁有1 . 2萬人的畢爾巴拉pilbara地區。
  6. The result indicates that, in the course of the rainstorm in huoshan, there are obvious low - level jet of great intensity, infection of mesoscale shear line, enhancement of plus vorticity which increases intensity of convergence, improves ascending velocity and brings on precipitation, and quick enhancement of helicity which provides the basis to forecast, in addition, convergence of moisture flux and analyzed potential vorticity which reflects baroclinic convective instability sufficiently indicate the characteristics of the rainstorm

    結果表明：此次霍山暴雨發生前後，存在明顯的大強度低空急流，並受到中尺度切變線的影響，而且正渦度的加強引起了輻合加劇，提高了上升速度從而引起降水，同時暴雨發生前螺旋度的迅速增強，也為預報提供了根據，另外水汽通量的輻合以及分析位渦反映出的斜壓對流不穩定都充分體現了這次降水的特點。
  7. Ground level restaurants offer outdoor seating on the waterfront promenade at the base of the tower. usually recorded music plays, but live entertainers also appear there. it is a nice spot to sip a beverage, savor the flavours of local cuisine, and watch the lights bobbing up and down as boats of all sizes pass by

    該塔共有二大特色，除了在頂層旋轉餐廳鳥瞰澳門及對岸風景外，低層的咖啡餐也設有露天座位，一邊嘴饞地道小食時，耳聽著現場或預先錄好的音樂，眼望在海中閃爍的船兒經過，也是不錯的節目。
  8. ( 2 ) the results reveal that the pre - swirl ratio has a great influence on the flow field of the rotating disk, even greater than the rotational reynolds number, and an initial constant is induced in moment coefficient cm and average nusselt number nuave correlations, which does not exist in the case of without pre - swirl

    （ 2 ）分析了預旋系數_ r對該旋轉盤腔流場的影響，定義了一個新的壓力系數c _ p ，該壓力系數c _ p沿徑向位置的變化對特定的旋轉雷諾數re _是一個常數。
  9. Rotor dynamic devise is the vital ache on rotating mechanism design. and prefiguring critical speed. calculating unbalance response is the central content

    轉子動力學設計是旋轉機械設計中的重要環節，而預計臨界轉速、計算不平衡響應又是其主要內容。
  10. By comparing the results with relative experiment data, it is shown that rng k - is more exactly than the other turbulent model. 2 ) the influences of axial inflow position, radial outflow size, rotating reynold number, non - dimensional mass flowrate and axial inflow angle on the flow and heat transfer characteristics were numerically investigated for a typical rotator - stator cavity with axial inflow, radial inflow and radial outflow. the correlations for average nusselt number vs rotating reynold number or non - dimensional mass flowrate were established

    （ 2 ）針對一典型的徑向、軸向進氣，徑向出氣的轉-靜盤腔結構，系統研究軸向進氣位置、徑向出口大小、旋轉雷諾數、無量綱質量流量和軸向垂直預旋進氣等對盤腔內流動和換熱的影響，整理出轉-靜盤腔內轉盤平均努謝爾數與旋轉雷諾數無量綱質量流量之間的準則關聯式。
  11. 4 ) in a pre - swirl rotator - stator cavities with discrete pre - swirl nozzles and blade - cooling entry holes, the influences of pre - swirl angle and flow parameter on the flow and heat transfer characteristics were numerically investigated. the correlation for average nusselt number vs rotating reynold number or non - dimensional mass flowrate were established. the results show that : advantage of per - swirl inflow is the effect of cooling the blade - cooling entry holes ; pre - swirl inflow increases heat transfer in rotating disk of pre - swirl chamber ; as pre - swirl angle increases, local nusselt number decreases in pre - swirl chamber ; the temperature of stator of inner rotator - stator chamber and per - swirl chamber decreases as rotating reynold number increases ; when the axial mass flowrate maintains constant, heat transfer in the rotating disk of inner rotator - stator cavities does n ' t change as per - swirl mass flowrate increases, while heat transfer in the rotating disk of per - swirl chamber increases ; when the pre - swirl mass flowrate maintains constant, change of the axial mass flowrate has effect on the whole cavity

    結果表明，預旋進氣的優點在於增強了葉片冷卻孔附近的對流換熱效果，局部努謝爾數隨預旋角的增大而有所減小；隨旋轉雷諾數的增加，不論是內轉靜腔室還是預旋腔室的靜盤上的溫度都不同程度的降低：當軸向中心進氣質量流量不變時，隨預旋進氣的質量流量增加，內轉靜腔室的轉盤盤面上的換熱基本沒有變化，而預旋腔室的轉盤盤面上的換熱效果增強；當預旋進氣質量流量不變時，軸向中心進氣的質量流量的改變對整個盤腔都有影響。
  12. This image then will be recovered and threshold transformed, thickened and rotated. finally system measures the parameters of the micro - hole and outputs the result. the high - automation of the system makes the worker with responsibility for measuring spinneret do much less than before

    然後通過去噪、閾值處理、圖像細化、邊緣檢測、圖像旋轉等預處理后，再對微孔的形狀分析和參數測量。
  13. Because of the difficulties on diagnosis and treatment, it is very important for the prevention of trichinosis. trichinella spiralis ( t. s ) has a complex life history and a variety of antigen components, so, despite of a lot of studies, no prevention measures specific for t. s has been found until now

    旋毛蟲病的診斷和治療都比較困難，因而預防顯得尤為重要。由於旋毛蟲生活史的復雜性和抗原的多樣性，雖然近年來許多學者進行了多方面的研究，但迄今為止，尚未發現免疫預防旋毛蟲病的有效措施。
  14. The performance of the centrifugal compressor at different diffuser stagger angles and different inlet guide vane ( igv ) prewhirl angles are measured

    摘要對擴壓器進口不同安裝角和進口導葉不同預旋角匹配下離心壓縮機的性能進行了實驗研究。
  15. The investigation shows the performance gets quite insensitive to the prewhirl angle of igv as the stagger angle of diffuser vane is reduced to the minimum 7 ; the combination of these two stators enables to greatly improve the compressor efficiency over the entire operating rage, the maximum efficiency with the combined adjustment reaches 86. 0 %, higher than that in alone adjustment of igv or diffuser vanes by 2 %

    研究表明：擴壓器進口安裝角最小值為7時，壓縮機性能對進口導葉預旋角不敏感；採用不同的擴壓器進口安裝角和不同進口導葉預旋角匹配調節時，壓縮機所能達到的最高效率為86 . 0 % ，比單獨調節進口導葉預旋角或擴壓器進口安裝角所能達到的效率高2 % 。
  16. Sixthly, this article analyses analyzes the influence of such main factors as the rotor whirling speed, the entrance pre - rotating speed, the entrance pressure and the seals clearance on the dynamic characteristics of labyrinth seals

    6 、分析轉子轉速、入口預旋速度、入口壓力、密封間隙等幾種主要因素對迷宮密封動力特性系數的影響。
  17. A very special rotating cavity with micro - turbine ( de - swirl nozzles ) was applied to investigate the flow characteristics inside the cavity under three mid rotating speeds

    摘要通過實驗對中等轉速下帶有微型渦輪（反預旋噴嘴）的旋轉渦輪盤腔內流動特性進行了系統研究。
  18. ( 2 ) axial pre - swirling inflow on high radius holds back the further transmission of heat effectively, to inner part of cavity

    （ 2 ）軸向高位進氣有效地阻止了熱流向盤腔內端縱深傳遞，在進氣加有預旋時效果更好。
  19. A new type of pressure coefficient cp is defined to lead to a linear correlation with radial locations, which will lead to a curve correlation with radial locations with conventional definition of cp. the correlations of cm, nuave and cp with rotational reynolds number have been got through the computation with rotational reynolds number from zero to 1. 0 108

    給出了扭矩系數cm 、平均換熱系數nu _ （ ave ）隨旋轉雷諾數變化的關系式，發現它們與沒有預旋時是完全不同的，當re _ = 0時， cm 、 nu _ （ ave ）不為零，而具有一個初值。
  20. ( 1 ) taking the new br 700 gas turbine which is developed by rolls - royce deutshland as research object, the numerical simulation has been applied to the new structure of rotating disk system with pre - swirl nozzles on the rotating disk with ? turbulence model and with a new hybrid grid

    （ 1 ）本文以rrd公司新研製的機種br700為研究對象，採用-湍流模型對帶有預旋的新型旋轉盤腔內的流動進行了數值計算。在旋轉盤的計算中提出了一種新的網格剖分方法，計算的旋轉雷諾數達到1 . 0 10 ~ 8 。
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