相對渦度 的英文怎麼說

中文拼音 [xiāngduìguōdù]
相對渦度 英文
relative vorticity
  • 相 : 相Ⅰ名詞1 （相貌; 外貌） looks; appearance 2 （坐、立等的姿態） bearing; posture 3 [物理學] （相位...
  • 對 : Ⅰ動詞1 （回答） answer; reply 2 （對待; 對付） treat; cope with; counter 3 （朝; 向; 面對） be tr...
  • 渦 : 渦名詞1. （漩渦） eddy; whirlpool; vortex 2. （酒窩） dimple
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 相對 : 1. （面對面） opposite; face to face 2. （非絕對的） relative 3. （比較的） relatively; comparatively
  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. 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。
  3. Aimed to realize the problem of quenched rail qualification forcast through quantitative analysis of quenched rail surface hardness by eddy current, and combined the eddy current theory with the computer image processing and signal analysis, the hardness testing model is established in this paper

    針對渦流無損檢測淬火鋼軌踏面硬度的定量分析來實現淬火鋼軌質量保證預報問題，將電渦流理論與現代計算機圖象處理和信號分析相結合，完成硬度測試模型建立。
  4. Abstract : aimed to realize the problem of quenched rail qualification forcast through quantitative analysis of quenched rail surface hardness by eddy current, and combined the eddy current theory with the computer image processing and signal analysis, the hardness testing model is established in this paper

    文摘:針對渦流無損檢測淬火鋼軌踏面硬度的定量分析來實現淬火鋼軌質量保證預報問題，將電渦流理論與現代計算機圖象處理和信號分析相結合，完成硬度測試模型建立。
  5. Results show that typhoons had different characters of boundary layer temperature and vorticity fields at different life stages, and the intensity of typhoons was inversely proportional to the distance between warm center and maximum positive vorticity center, that is to say, the smaller the distance, the stronger the typhoon

    結果表明：在臺風的不同發展階段，其大氣邊界層相對渦度場和溫度場的結構有著明顯的不同特徵，暖中心與正渦中心的距離與臺風強度為反相關關系，暖中心與正渦中心的距離越小，臺風強度越強。
  6. At last, three - dimensional mathematical model of gas - particle two phase turbulence was established, and it was adopted to study the gas - particle two phase rectangular jet as well. the distribution of the time - averaged velocity and turbulence intensity was studied, and some of the simulation results were compared with the experimental results ; the coherent structure of flow field was described in the three direction, the evolution and motion of the eddies was discussed too ; the dispersion of fine particles in the three dimensional space was also investigated

    全面地分析了矩形射流氣相時均流場的速度、湍流強度的空間分佈規律，並就部分數值模擬結果與實驗結果進行了對比研究;描述分析了氣相流場湍流擬序結構，對流向、橫向和展向三個方向旋渦的空間結構特點進行分析研究，並分析了流向渦隨時間變化的發展、運動規律。
  7. 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。
  8. The different organizing of mesoscale cyclone and " convective line " makes the mcss difference in shapes with circular or belt, respectively. a kind of favorable synoptic environment for ma

    脊軸，走向和水汽羽平行，同時水汽羽也和一條正渦度帶相對應，其位置和走向均和低空es 。
  9. In 1999, the dipole existed in between the okhotsk high and the depression in the north of northeast china, thus the okhotsk high became active and maintained, the subh was located to an area quite further south than usual. the high persisted in the east region of nw china, the cold air flowed to the mid - lower reaches of the yangtze river along the high. in the east region of nw china, air steam under troposphere was strong sinking motion, and formatted the negative vorticity region, the vapour flux divergence was divgence. lt was apparently that the rain could n ' t occur in the eastern portin of nw china. in 2000 year, okhotsk high was very weak or did n ' t exist in, there was high in the east asia - japan, the subh is located to an area further north than usual. in the east region of nw china, the trough maintained, air stream under troposphere was strong ascending motion, the cycolonic circulation was prevailing, the vapour flux divergence was intensive convergences the rain easy happened in the east areas of northwest china

    4多梅雨1999年鄂霍茨克海阻塞高壓與我國東北北部低壓形成偶極子，使得阻塞高壓穩定少動，西太副高位置偏南，西北地區東部持續受高壓控制，冷空氣沿此高壓流經長江中下游地區上空；在西北地區東部對流層中下層氣流下沉運動較強，呈反氣旋渦度，水汽通量散度輻散，不利於西北地區東部降水。空梅雨2000年相反，鄂霍茨克海高壓減弱甚至不存在，東亞-日本為高壓，西太副高位置偏西偏北，西北地區東部處于西風槽中，對流層中下層氣流上升運動增強，盛行低壓環流，水汽通量散度強烈輻合，有利於降水生成。
  10. The existence of the asymmetrical residual transverse circulation flows in pair is discovered in the residual vorticity field along the passage and sandbank cross section. the transverse residual circulation flow is favorable to sediment ' s moving to the peak of sandbank and the development and maintenance of sandbank

    首次發現，在潮漲潮落過程中，深槽中及沙脊兩側均存在一組方向相反、不對稱余渦度場（余環流場） ，橫向余環流的存在將有利於沙脊兩側的泥沙均向沙脊頂運動和堆積，是潮流沙脊的形成和維持重要動力因素。
  11. Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate

    摘要以普蘭德動量傳遞理論為基礎，按照卡門的三層模型，通過室內模擬環道用0號柴油及加入減阻劑在圓管內的流動參數的測定，計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流粘度，渦流粘度與運動粘度比、總應力隨相對位置的變化等定量參數，探討了高分子減阻劑對非牛頓流體流動特性的影響，對湍流減阻現象的機理與增大減阻率的條件進行了定量分析。
  12. Within this area is a double minimum in pressure with one center collocated with the vorticity maximum and the other about 3 km farther north

    在這一區域內有一對最小氣壓中心，一個與最大渦度中心相重合，另一個則在更向北3公里左右處。
  13. In order to research the eddy current electromagnetic force that varies with the relative speed, including brake force and attraction, the high speed simulation test stand for track eddy current brake was developed

    為了研究渦流電磁力包括渦流制動力的電磁吸力，在不同的相對運動速度下的變化規律，研製了軌道渦流制動試驗臺。
  14. In terms of the ncep reanalysis data, rainfall and temperature data from sixteen stations of china and the tbb data provided by the meteorological research institute of japan, the main features and basic rules of westward extension and withdrawal processes of the northwest pacific subtropical high ( sth ) and its effect on the weather of the east china are investigated in this paper, by composite analysis, theoretical analysis and dynamical diagnosis. based on the relation between the heating and sth, the effects of the distribution of apparent heat source beside the sth on its maintenance and westward extension are also discussed, using the apparent heating to quantitative calculate the complete vorticity equation ( cve ). major results are as follows : ( 1 ) the variation of 500hpa vorticity in the key area ( 115 - 125 e, 20 - 30 n ) is used to indicate the westward extension process of sth

    本文利用ncep再分析資料和國家氣象局提供的160站降水和溫度資料以及日本氣象廳提供的t _ （ bb ）資料，通過合成分析、理論分析、動力診斷等方法，詳細分析了六月份西太平洋副熱帶高壓的西伸過程特徵，以及西太平洋副熱帶高壓西進東退的規律及其對我國東部天氣的影響，並圍繞加熱場與西太平洋副熱帶高壓的相互關系這一主題，重點討論了大氣視熱源分佈對西太平洋副高維持與西伸的影響，並運用全型垂直渦度方程對副高形態變異的可能機理進行了研究，得到了以下主要結論： （ 1 ）本文選取了關鍵區（ 115 ? 125 e ， 20 ? 30 n ）內的渦度值來表示副高的西伸過程。
  15. Comparing with the results of single passage ' s simulation, the present multipassage simulation leads to more precise results, especially for temperature fields

    相對于簡化成單通道渦輪級的數值模擬得到更精確的結果，尤其是對溫度場的模擬。
  16. The mcc develops mechanism is analyzed based on moist thermal wind theory, relatively mesoscale convectively generated vortex, potential vorticity thinking, inertial instability theory and so on

    用濕熱成風、相對中層渦旋、等熵位渦、慣性穩定度等討論了mcc的發生發展機理。
  17. A transverse secondary circulation is produced by the coupling of high and low jets, while the sinking branch of the secondary circulation providing the dynamic conditions for the dry intrusion air. during the period of the heavy rain process, dry intrusion descends southward along the intense constant potential temperature lines, which promotes the lower cyclone. in addition, the pouring of upper - level dry air not only decreases ground temperature behind the front but also increases surface pressure and velocity

    由於高、低空急流耦合，在高空急流中心左側產生的下沉運動和高空急流中心右側、低空急流左側產生的上升運動在鋒面上形成一次級環流，次級環流的下沉支運動為對流層高層干空氣和高位渦的下傳提供了動力條件；進一步研究發現，干侵入沿相當位溫密集帶向南向下伸展，引起對流層低層氣旋性渦度的發展；此外，高層乾冷空氣向下注入，導致地面溫度降低、氣壓升高、風速加大、低層輻合增強、上升速度加大，從而促進了新的對流運動，引起降水增強。
  18. Abstract : an experimental investigation of local scour around a new type bridge pier under a clear water regime is presented. the main characteristic feature of flow is relatively large horseshoe vortex flow along the circumference of the pier. and the procession of scour is discussed in this paper. equation for predicting the depth and area of local scour hole is presented. it is significant for evaluating the potential for scour around this type pier

    文摘:介紹了一種新型橋墩即多腹薄壁墩的局部沖刷試驗成果.認為橋墩周圍的水流以繞流橋墩的相對較強的馬蹄型漩渦系為主要特徵.並討論了沖刷過程，給出了預測沖坑深度及大小的關系式，可供估算同類型橋墩的沖刷參考
  19. The main conclusions show as following : 1 the effects of propagating vortex rossby waves on tc intensity change are relative closely to the position, the size and intensity of the initial disturbance

    主要結果可歸納如下： 1渦旋rossby波傳播對熱帶氣旋強度變化的影響，與初始擾動相對渦旋中心的位置、初始擾動尺度大小及強度等關系密切。
  20. 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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