紊流區 的英文怎麼說

中文拼音 [wènliúqū]
紊流區 英文
recirculation zone
  • 紊 : 形容詞（紊亂） disorderly; confused
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 區 : 區名詞（姓氏） a surname
  • 紊流 : burble
  1. Considering the characters of the viscoidal turbulent flow over high - speed train, the computing model of the outer fiow field for high - speed train has been established based on the incompressible fluid navier - stokes epuation and the turbulent model of ke two equations. the equation set of the flow field problem via finite element methods ( fem ) has been set up

    根據高速列車粘性紊態繞流的特點，在較少簡化的條件下以navier - stokes方程和-兩方程紊流模型為基礎，建立了高速列車外流場的計算模型，在近壁區域採用壁面函數修正紊流模型。
  2. 3. a three - dimensional - acoustic doppler velocimeter has been used to measure the velocity and turbulence in a compound channel with vegetated and unvegetated flood - plains. particulary in the interface region between main channel and floodplain. the distribution in three coordinate directions of velocity and turbulence intensities and the renolds stresses are presented. the momentum transfer at the main channel flood - plain interface can be described as an apparent shear stress which can be quantified as a function of the local turbulence at the interface

    採用adv對灘地種樹前後灘槽交界區域的流速場進行了量測。分析了灘槽交界區域的垂線流速、紊動強度和雷諾應力的變化。將灘槽交界的動量傳遞描述為一表觀應力，這個表觀應力可以看作是交界面處的脈動函數並將其定量化。
  3. The blade inner channel cooling is a complex convection - conduction coupling problem. this thesis build a three - dimension. compressible turbulence model, and give a general solve method. with the geometrical model of the glossily rectangle straight channel, the rectangle straight channel with in - line arrays disturb plates, the rectangle straight channel with staggered arrays disturb plates, the rectangle straight channel with slant disturb plates, this thesis compute the flow and heat transfer condition when the cold air path though these channels, and gain the temperature field, pressure field, velocity filed, in addition. this thesis also analyze the influence of the different channel height, the different channel materials, the different channels, and gain the function relation between he nusselt number, friction factor and reynolds number. this thesis is emphasis on the new heat transfer enhancement structure, that is, disturb plates, with the comparison with the glossily channel and channel with pin fins, the heat transfer enhancement effect of the former is better, and the conclusion can be used in the design of aircraft blade

    葉片內部通道冷卻是一個復雜的對流?導熱耦合傳熱問題，本文在分析葉片內部通道冷卻的流動與傳熱情況的基礎上，建立了三維、可壓縮紊流的物理模型，得到了通用的求解辦法；利用不帶擾流片的矩形直通道、帶順排擾流片矩形直通道、帶叉排擾流片、帶傾斜擾流片的矩形直通道的幾何模型，計算了冷卻空氣通過這幾種通道時的流動與換熱情況，得到了各種不同情況下計算區域的溫度場、壓力場、速度場；在此基礎上分析了不同的通道高度、不同的葉片通道材質對葉片內部通道冷卻的影響，並整理得到了各種通道形式下，努謝爾數和阻力因子與雷諾數的函數關系；本文重點研究了新型的葉片內部通道冷卻強化傳熱措施?帶擾流片的內部冷卻通道的強化傳熱效果，通過與光滑矩形直通道、帶針肋通道的冷卻效果的比較，表明了這種新型鮚構的優勢，對于葉片內部通道冷卻結構的設計可以起到指導的作用。
  4. The experimental results of the flow characteristics of the mmc heat sink indicate that the critical reynolds number signifying the transition from laminar flow to turbulent flow is in advance ; under the same experimental conditions, the variation in entrance direction of the microchannel inlet and outlet has little effect on the microchannel ; the experimental values of the friction factor of the de - ionized water in a microchannel agree well with those calculated using the theoretical laminar formula ; furthermore, a comparison of the experimental results and simulation results shows that navier - stokes equation and rng - turbulence model can be used to model the laminar and turbulence flow regions in a microchannel ; meanwhile, the correlations of the flow resistance in the turbulent flow regions for the de - ionized water as the working fluids are obtained from experiments

    對歧管式單通道熱沉流動特性的研究結果表明，微通道內流體流態由層流向紊流轉變的臨界雷諾數提前;改變流體的進出口方向對熱沉總壓降造成的影響很小;摩擦系數的實驗值與理論值較接近;數值模擬結果能夠與實驗值較好吻合;並由實驗給出了紊流區流動阻力的實驗關聯式。此外，選用十二烷基硫酸鈉（ sodiumdodecylsulphate ， sds ）以及烷基多糖苷（ alkylpolyglycoside ， apg ）作為減阻添加劑，研究了表面活性劑添加對微通道流動特性的影響。
  5. Numerical simulation on the three - dimensional turbulence flow in the pick - up tube is based on reynolds time - average navier - stokes equations. the k - turbulence - closed model is used in this paper. in the near wall area the standard wall function is used

    對集流管的三維粘性紊流模擬計算是建立在雷諾平均的navier - stokes方程的基礎上，紊流封閉模型採用目前工程上應用比較廣泛的模型，在靠近固壁區採用了標準的壁面函數法。
  6. This paper descripts the present situation of the ecological environment in fushun city, including the high forest coverage, the unreasonable ecological structure, the influenced ecological function, the mine developing destroyed the deterioration ofecological balance seriously, the deterioration of ecological environment of mining area ; the coverage rate of nature reserve is relatively high1 but bio - diversity is still threatened seriously ; agriculture ' s ecological problem is severe ; soil erosion is serious ; the arrangement in the finished area is disorderly, the green land system is scarce of inconnective

    摘要撫順市生態環境現狀： （森林覆蓋率較高，但生態系統結構不合理，生態功能的發揮受到影響；礦產開發嚴重破壞生態平衡，礦區生態環境惡劣，歷史欠帳大；自然保護區植被覆蓋率較高，但生物多樣性仍遭受嚴重威脅；農業生態問題嚴峻；水土流失嚴重；建成區布局紊亂，綠地系統缺乏連通性。 ）
  7. In order to probe into the anti - friction mechanism and effectiveness of turbulent zone of flexible pipe, extensometer with high accuracy and high - frequency response characteristics is used to study the frequency variation feature of flexible pipe ' s outer diameter with reynolds number

    摘要為探討柔性管的紊流區域減阻效果的產生機理，採用高精度高頻率響應特性的應變儀對柔性管外徑隨雷諾數的頻率變化特性進行了研究。
  8. This paper offers a method that can avoid the incorrect or rough methods mostly accepted now, and this method considers the temperature change along pipeline, the difference of friction loss in turbulence zone and the throttle effect in cross - section of reduced pipe

    針對現有的靜態模擬演算法存在的錯誤和不足，提出了一種更為精確的模擬演算法，該演算法除考慮了管道沿線的溫度變化、處于不同的紊流區摩阻損失的大小不同之外，還考慮了變徑管道在變截面處存在節流效應等問題。
  9. For dilute solid - liquid two - phase flow, the mechanism of particle motion driven by fluid is the main subject, especially the particle motion in the near wall region. the bursting phenomenon and coherent structure of turbulence play an important role on the motion of particles in the near wall region

    明槽紊流近壁區的顆粒運動與紊動猝發現象及紊流相干結構有著密切的關系，開展近壁區顆粒與紊流相互作用的機理研究對于流體力學和泥沙運動力學都有著重要的理論意義和實際價值。
  10. A measurement system was developed based on flow visualization and image processing techniques, which can be used to investigate the spatial structure of low - speed streaks in the near wall region of turbulent open channel flow

    基於流動顯示和圖像處理技術，獨立開發了明槽紊流近壁區帶狀結構的實時測量系統。
  11. In this paper, the spatial structure of the low - speed streaks and particle motion in the near wall region of turbulent open channel flow were observed on the side and bottom of a water flume, respectively, using flow visualization and image processing techniques

    本文以試驗研究為主要手段，採用流動顯示和圖像處理技術，從水槽底部和側面兩個方向測量，分別對明槽紊流近壁區的帶狀結構及顆粒運動特性進行了系統的試驗研究。
  12. A series of experiments in a wider range of reynolds number were conducted for the investigation on the spatial and temporal distribution of the low - speed streaks in the near wall region of turbulent open channel flow. for the first time, the relationships between the spacing, the width, the length scale in the streamwise direction and the duration time of low - speed streaks and the reynolds number based on shear velocity were revealed

    在水力光滑區和過渡區對明槽紊流近壁區的帶狀結構進行試驗，測量並分析了帶狀結構的分佈，首次揭示出低速帶間距、寬度、縱向尺度及持續時間等隨摩阻雷諾數的變化規律。
  13. It is proved that polypropylene fiber concrete performs well in resisting impact, abrasion and crack, and thus well applicable in sandy flow region characterized in high speed and turbulence, such as the filling & emptying culvert of shiplock, etc

    表明聚丙烯纖維混凝土具有良好的抗沖耐磨性能和抗裂性能，可較好地應用於船閘輸水廊道等處于高速、紊亂、含沙水流區。
  14. Abstract : based on the turbulent flow kinetics theory the paper describes astudy on two - region flocculation model, the turbulent region is the dominant effect of fiocculation speed, the transition region is the dominant effect of scale and compactness of floculating body, and the order magnitude of available energy disipation and controlling index is put forward

    文摘:應用紊流動力學原理，分析紊流條件下兩區絮凝模型，提出紊流區主導絮凝速率，過渡區主導絮凝體的成長尺度及密實度，導出了有效能耗的量級及絮凝控制指標。
  15. The oil boom and the liquidity that washes in its wake explain much of the turbulence in the region ' s markets

    石油膨脹和流動資產的復舒導致了這個地區市場的紊亂。
  16. The standard k - e turbulence model was employed in the core region of the cavity. two low reynolds number turbulence models, single equation model and launder and sharma low - reynolds number k - e model, were used in the near wall regions

    在紊流核心區採用標準k -模型，近壁區分別採用單方程模型和launder ? sharma低雷諾數k -模型，採用simple演算法，求解並獲得了盤腔中的速度和壓力場、全域的溫度場以及流固界面上的換熱系數和努謝爾數分佈。
  17. Based on the detailed and abroad investigation of the inland and overseas literatures three dimensional turbulence computation in recent 10 years, the vertical delaminating coefficient ko was introduced in normal - coordinate transform in this paper. this means = was used to displace the normal, which has been regularly used in the computation of 3d flow in recent years. the use of new coordinate is aimed to match the landform better and improve the instance that the normal coordinate mathematic models are emanative with complicated landform sometimes

    在對近年來國內外三維紊流計算的有關文獻進行了細致的分析研究基礎上，本文將三維紊流計算中常用的坐標變換加以改進，引入垂向分層系數k _ 0 ，採用= k _ 0 （ z - ） d的變換方法，以期更好地與實際地形相匹配，改善常見坐標變換數學模型在地形復雜地區容易發散的問題，並給出了k _ 0的確定方法。
  18. Ebu - arrehenius and second - moment turbulent combustion model are used to determine the reaction rate. to consider the influence of heat radiation on the gas temperature and wall temperature, the six flux model is applied to predictions of heat flux distributions. the discretization of governing equations on a non - staggered grid system is performed by hybrid scheme over the control volume, and discretization equations are solved with simple algorithm

    利用橢圓型微分方程法和區域法生成三維貼體網格，文中數學模型有紊流模型、紊流燃燒模型和輻射模型，採用k -雙方程模型來預估紊流特性， ebu - arrehenius和二階矩紊流燃燒模型來估算化學反應速率，六通量輻射模型預估輻射通量，以便考慮熱輻射對壁溫和氣流溫度的影響。
  19. ( 2 ) before and after the frames are placed the velocity vertical distribution in the same cross - section are measured by adv. the results indicate that after the frames are placed the mean velocity and turbulent intensity near bed are reduced, and vertical distribution of turbulent intensity is more uniform

    （ 2 ）採用adv超聲流速儀對投放框架群前後同一斷面的垂線流速分佈測量表明：水槽投放四面體后，不但可以降低近底區的時均流速、紊動強度，而且均化了紊動強度的垂線分佈。
  20. Moreover, this paper investigates the influences of surfactant aqueous solutions on flow characteristics of a mmc. sodium dodecyl sulphate aqueous solution and alkyl polyglycoside aqueous solution are used as working fluids. the experiment results indicate that the drag reduction depends on flow velocity and temperature ; the drag reduction effects aren ’ t very obvious in laminar flow region, but when fluid enter turbulent flow region, the drag reduction increase notably, the drag reduction effects

    研究結果表明，阻力減小率（ dragreduction ， dr ）與流速和溫度有關;層流區內表面活性劑的減阻效果不是特別明顯，但進入紊流區后減阻效果開始增強，尤其進入旺盛的紊流區后減阻效果大大增強;溫度提升也可增加dr ，但在溫度較高時添加sds后減阻效果的改善卻不及apg 。
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