渦量方程 的英文怎麼說

中文拼音 [guōliángfāngchéng]
渦量方程 英文
vorticity equation
  • 渦 : 渦名詞1. （漩渦） eddy; whirlpool; vortex 2. （酒窩） dimple
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 程 : 名詞1 （規章; 法式） rule; regulation 2 （進度; 程序） order; procedure 3 （路途; 一段路） journe...
  1. By performing fourier transformation, the relationship between the turbulent intensity of the particle and that of the carrier fluid was obtained which makes clear that particle size, specific gravity, velocity gradient, and the characteristic frequency of energy - containing eddies are four basic influencing parameters. it is proven theoretically that under certain conditions, the stream - wise and transverse particle turbulent intensities exceed those of the carrier fluid. based on the equations of two - phase flow, the presence of fine sediment suspension is shown to attenuate the turbulent intensity of the water

    通過對細小顆粒在剪切流場中運動方程的fourier分析，得到了顆粒脈動強度和流體脈動強度之間的定量關系，表明顆粒粒徑、顆粒密度、流速梯度以及紊動場含能旋渦的特徵頻率是影響顆粒脈動強度的主要因素，首次從理論上證明了在一定條件下，顆粒在縱、垂向的脈動強度均會超過相應的流體脈動強度，為已有的實測資料提供了合理的解釋。
  2. Finally, the mechanisms behind the instability of fibre suspensions are presented from a point of view of vorticity. effects of fibres are investigated through equations of vorticity transport and enstrophy balance

    從渦量的角度分析纖維改變懸浮流動穩定性的機理，利用渦量輸運方程與渦能平衡方程分析纖維的作用。
  3. In this paper, some characteristics of flow movement and sediment transport are analyzed by using the flume experiment data. the cross section of compound channel can be divided into four regions : the undisturbed region in main channel, the interactive region between channel and plain, the undisturbed region in flood plain and the boundary region. in the undisturbed regions, the distribution of longitudinal velocity along the depth has the feature of lograithmic. whereas, in the interactive region, the longitudinal velocity does not obey the logarithmic distribution law, but it can expressed as a revised logarithmic function by using a wake function. on the basis of the kinematic equation the velocity distribution of transverse velocity is obtained. in the boundary region, the longitudinal velocity obeys the law of parabolic distribution. furthermore, according to the simplified diffusion equation, the transverse distribution of sediment concentration in the interactive region is deduced. the analysis is in good agreement with the measured data

    本文根據漫灘水流的運動特點，將漫灘水流的復式斷面分為主槽平衡區、灘槽交互區、灘地平衡區及邊壁區等4個區，並給出了各區寬度的經驗公式.根據灘槽交互區垂線流速分佈的變化特點，提出了附加尾流函數的對數流速分佈公式.在簡化水流運動方程和泥沙擴散方程的基礎上，對灘槽交互區內垂線平均流速及含沙量沿橫向分佈進行了理論分析，提出了反映灘槽水流動量交換強度的橫向渦量粘性系數及橫向擴散系數的表達式，得到了漫灘水流垂線平均流速及含沙量沿橫向分佈的解析解，並與實測資料吻合較好
  4. In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source

    摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。
  5. In order to make clear the changing situation about various meteorological element fields during the heavy rain. the diagnostic analysis in three aspects was done in this text : the vapor conditions, in which the difference of the temperature and dew point, relative humidity, vapor flux and the divergence of vapor flux were discussed ; the dynamic and thermodynamic conditions, vorticity, divergence and vertical velocity were analyzed ; the vertical layer condition, which included potential temperature, static stability, convective ( potential ) instability and the vertical profile of eight physical fields over the observatory of shenyang

    為了弄清這次暴雨過程各氣象要素場的演變情況，分三方面對暴雨的水汽條件（使用了溫度露點差、相對濕度、水汽通量和水汽通量散度） 、動力條件（使用了散度、渦度和垂直速度）和垂直層結條件（使用了位溫、靜力穩定度和潛在不穩定度以及沈陽單站的8個物理量的垂直廓線）等的變化，分別進行了診斷分析。
  6. According to the definition of stream function and vorticity, this article theoretically derives a formulation of definite solution problems for resolving two dimensional flow, which is different from the usual formulation, from the stream function - vorticity n - s equation

    摘要從定常二維平面流動的流函數渦量型n - s方程出發，從理論上推導出一種不同於通常提法的二維平面流動的定解提法。
  7. In this paper, the contents and the methods of the impacting test to the particle separator vortex blades by the foreign object are introduced, the ultra dynamic strain device is used to carry on the measure of this experiment and obtained the strain - time history, three dimensional coordinate measuring method is used to measure the remaining distortion of the vortex blade, and the high speed photographic apparatus is used to carry on the photography of the impacting experiment

    本文介紹了對粒子分離器渦流葉片進行外物撞擊試驗的內容和方法，採用超動態應變儀對外物撞擊試驗進行了測量，獲得了渦流葉片不同外物撞擊下的應變-時間歷程，採用三坐標法測量了外物撞擊后渦流葉片的殘余變形，並採用高速攝影儀對外物撞擊渦流葉片的全過程進行了拍攝。
  8. In the first part of the paper, on the basis of the weather processes of huai he basin from june to august in 1998, the difference and reliability of the two reanalysis data game and ncep from the fields of basic element, derivative, precipitation, and surface flux were studied by diagnostical and statistical methods. the results showed that the game reanalysis data is more reliable than ncep / ncar reanalysis data at the bottom and mid - high levels of troposphere, and at the precipitation and surface flux fields the case is just the same. in addition, the paper revealed that the game reanalysis data can show the evolution of the southwest vortex but the ncep / ncar reanalysis data cannot do so

    在第一部分，本文以1998年6 - 8月我國江淮地區的天氣過程為背景對game和ncep兩組不同的再分析資料的基本要素場、導數場、降水量場和地面通量場用氣候診斷和統計的方法進行了對比分析，結果表明，在對流層低層和中高層game再分析資料的基本要素場及地面的降水場和通量場較ncep再分析資料更為準確； game再分析資料能很好地反映出西南渦東移並影響江淮大暴雨的重要天氣特徵，而ncep資料則反映不出這一現象。
  9. Therefore, the paper establishes the parallel computing platform and meets the demand of computing resources for large eddy simulation. it also studies the integration of cad / cam, grid generation system and cfd system, and brings the model computed in the paper into this system. on the bases of systematical and thorough numerical simulation researches in circular cylinder and the compares between instantaneous piv metrical results and numerical results of circular cylinder, the paper obtained some problems and several conclusions which should be noticed in les for making correct computatioa finally, by using these experiences and conclusions above and by putting them into an actual problem in engineering - optimized numerical simulation of static mixer, this paper achieved the turbulent high - level numerical simulation technique, i. e., system atical attempt in engineering application by les method

    為此，搭建了微機并行計算平臺，解決了大渦模擬對計算資源要求；對cad cam 、網格生成與cfd系統集成進行研究，並將論文中所要計算的模型納入到此系統內；在對圓柱繞流問題進行了系統和深入的數值模擬研究和對圓柱繞流瞬態piv測量結果與數值計算結果進行比較工作基礎上，得到大渦模擬方法正確計算所需要注意問題和若干結論；最後利用以上得出的計算經驗和結論，通過對一個實際工程問題? ?靜態混合器優化的數值計算，完成了cfd中湍流高級數值模擬技術? ?大渦模擬方法工程應用的系統嘗試。
  10. In this paper, the status quo of the tip clearance of aero - engine is surveyed, the theory and the method of the numerical computation of tip clearance are introduced, the simple tip clearance calculation program is modified and refined and the computation method of the turbine temperature field is improved

    本文闡述了國內外航空發動機葉尖間隙的研究現狀，介紹了渦輪葉尖間隙計算的理論和方法。對渦輪葉尖間隙準二維計算程序作了修改和完善，改進渦輪部件溫度場的計算方法，增加了變量顯示/修改、程序控制和結果顯示界面，使軟體更加直觀，實用。
  11. Starting from a two - layer nonlinear quasi - geostrophic baroclinic vorticity equation containing ekman friction, a new generalized energy is proposed to act as lyapunov function and thus a new criterion of nonlinear baroclinic subcritical instability containing two inequalities is obtained

    從含ekman摩擦的二層非線性準地轉斜壓渦度方程出發，提出了一種新的廣義能量作為lyapunov函數，導出了非線性斜壓亞臨界穩定性判據。該判據含有兩個不等式： （ 1 ）
  12. 2 an f - plane quasi - geostrophic barotropic vorticity equation model of high resolution is designed in this paper in order to investigate the characters of vorticity propagation and the effect of nonlinearity on the propagation within a typhoon circulation, wherein two mesoscale vortices coexist at different radial positions

    2設計了一個高解析度的f平面的準地轉正壓渦度方程模式，用以研究兩個徑向距離不等的中尺度渦旋共存條件下，臺風環流內渦量傳播的特徵，以及非線性在此傳播過程中的作用。
  13. Vorticity is a physical quantity measuring the rotational sense and speed of a fluid flow

    渦度，是表示氣流的旋轉程度和旋轉方向的一個物理量。
  14. It uses the encouragement of step wave or other impulse current field source to produce the transition process field in earth. in the moment of shutting the power it produce the volute alternating electromagnetic field. from the abnormity of measuring the attenuation character of the second induction electromagnetic field, which produced by underground medium with time change, the conductive capacity and the position of the underground non - homogeneous substance can be analyzed

    瞬變電磁法（ transientelectromagneticmethod ）是一種時間域的電磁勘探方法，利用階躍波或其它脈沖電流場源激勵，在大地產生過渡過程場，斷電瞬間在大地中形成渦旋交變電磁場，測量這種由地下介質產生的二次感應電磁場隨時間變化的衰減特性，從測量得到的異常分析出地下不均勻體的導電性能和位置，從而達到解決地質問題的目的。
  15. The traditional signal processing methods that amplify, filter, rectify signal and count, which are used in vortex flowmeter now, has shortage in extracting real flow signal from noise. the methods that restrict measurement range or do n ' t measure small flow have to be adopted

    目前渦街流量計所採用的放大、濾波、整形、計數的處理方式，在從噪聲中提取流量信號方面存在較大的局限性，只能採用限制量程比、不測小流量等方法來抑制噪聲。
  16. Based on the experiments, the simulation of the heat exchanger and scroll compressor was accomplished which also offered a favorable condition to the establishment of the whole gwshp methods were used to improve the veracity and astringency of the model, such as : dividing the condenser into several tiny segment with equal area ; separating the condensing process into single - phase region and double - phase region ; the comparing result showed that most of the error between the data of simulation and experiment was within 5 % while the maximal error was 8. 35 %

    在建模過程中，從大量蒸發和冷凝的換熱關聯式中，通過與實驗數據的比較找出了與實驗結果最為接近的換熱關聯式在建模過程中，針對冷凝器及板式換熱器的特點，採取將冷凝器按面積分成若干個微元段，並將冷凝過程分成單相區和兩相區的方法。同時對渦旋壓縮機進行建模和分析同時在熱力學平衡基礎上與實驗數據比較，經過驗證，對于換熱器模型，模擬計算與實驗結果的誤差一般都在5以內，最大為12 。
  17. 2 ) the analyse of the structure of mei - yu low and the elationship between the low and rainfall three lows moved along the mei - yu front towards the northeast during mei - yu period in 1999, which produced three intensive rainfall periods along the yangtze river : ill the station of huangshan, the most heavy rainfall center, totally had 850mm rain during 11 days. the reason for the heavy rainfall was the sustaining moisture supply from the south, and the deep moist layer and the high relative humidity in the south - east quadrant

    2 ）梅雨鋒低渦的結構及其與降水關系分析1999年在梅雨鋒上有三個梅雨鋒低渦相繼在其上產生，冰箱東北方向移動，分別對應著長江中下游的三次強降水過程：最大降水中心黃山11天累計降水量達到850mm ，為梅雨期間平均降水量的150以上。低渦之所以產生這么大的降水和降水強度是因為低渦在移動過程中不斷有水汽輸入和補充，在其東南象限對流層中低層維持了深厚的濕層和很高的相對濕度。
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