紊流動能 的英文怎麼說

中文拼音 [wènliúdòngnéng]
紊流動能 英文
turbulent kinetic energy
  • 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...
  • 能 : 能名詞（姓氏） a surname
  • 紊流 : burble
  1. The effect of groyne length and layout on water surface is analyzed in the paper. based on the results of simulation and experiment, the local energy loss of the flow due to the groyne is studied. consequently the surface variation and height of damming are also analyzed

    論文分析了丁壩長度與布置對水面線的影響，根據流場、紊動場模擬結果和實驗結果研abstract究丁壩造成的水流局部能量損失，並對水面變化和丁壩奎水高度進行了分析。
  2. 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。
  3. According to the distribution of the turbulence kinetic energy and turbulence dissipation rate in the whole flow field, the mechanism of energy dissipation of stepped spillway is analyzed

    本文首次從紊動能和紊動耗散率在整個流場的變化規律出發，分析了階梯的消能機理。
  4. The elementary flow structure is a mixed structure of the main jet section and the swirl software. the boundary section is a strong turbulent cut section. the main jet mainly dissipates the energy in this section

    主射流機誡能的傳遞、再分配和消散過程中，紊流脈動所提取的能量最多，其次h漩渦所吸收的能量。
  5. Although the knowledge of wind effects on tall buildings has significantly improved over the last decades, an understanding of the mechanism that the atmospheric flow field to various wind include effects on structures has not been developed sufficiently for formulation of functional expressions. not only is the wind approaching a building complex, but the flow pattern generated around a building is complicated by the distortion of the mean flow field, the flow separation, the vortex formation, and the wake development

    在過去的幾十年裡，雖然人們對高層建築風效應的了解已有顯著提高，但對大氣流場與結構物各種風致響應的關系還不能用解析表達式加以描述。由於平均流場的奇變、流動分離、旋渦形成以及紊流的發展，不僅使得流向建築物的風，而且使得繞建築物的流譜變得十分復雜。
  6. A variety of mathematical models based on continuous equation and the momentum equation and many solutions partial differential equation value computational method in the open canal turbulent flow solution, still could widely apply and yield the satisfactory result

    但是，非穩態的navier - stokes方程對于明渠水流的瞬時運動還是適用的，以連續方程和動量方程為基礎，建立的各種數學模型和許多求解偏微分方程的數值計算方法在明渠紊流的求解中仍能廣泛應用。
  7. At the same time, contour stream line, vortex, kinetic energy which are computed are important to investigate complex flow and turbulent flow

    同時得到其它的參數如渦量場、等流函數線、紊動能等，這些參數對復雜流動和湍流有重要的研究意義。
  8. It is a reliable instrument for the measurement of the coherent structure in turbulence. an improved 2 - d ptv was developed based on previous research experiences, which can be used to measure the trajectories of particles motion. for the experimental study on the particle motion in the dilute solid - liquid two - phase flow, especially for the motion characteristics and dynamic characteristics of coarse particles in water, this kind of system was proved to have great advantages

    利用該系統可獲取大量的統計樣本並進行計算機快速分析，為明槽紊流相干結構的試驗研究提供了一種嶄新的測量手段；在前人工作的基礎上，開發了一種能夠測量水流中顆粒運動軌跡的ptv系統，該系統具有可靠的精度，能同步測量全剖面的顆粒瞬時運動信息，為顆粒運動特性及動力學特性的試驗研究提供了強有力的手段。
  9. For the present two les models, adopting the subgrid eddy viscosity concept and introducing the transport equation of turbulence energy k, the subgrid scale turbulence is parameterized by the turbulence energy k and the length scale of turbulence / ( k - 1 model ). in addition, vegetation is considered as an internal source of resistant force and turbulence energy

    在應用大渦模擬方法求解數值計算模型控制方程時，亞網格雷諾應力項沿用了亞網格渦粘性系數思路，引入亞網格紊流脈動動能k的輸運方程，建立了關于亞網格紊流脈動動能k和紊流特徵長度l的k - l模型求解。
  10. 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。
  11. The numerical simulation was made on this kind of energy dissipator by using the k - s turbulence model, the full - field distribution of the time - averaged parameter and the turbulence parameter are described in detail, the calculated time - averaged pressure has good agreement with the experimental results, some advice can be provided for the further study and application in this thesis, especially the calculated results can be used to check the lowest time - averaged pressure

    本文對洞塞式消能工採用軸對稱的k -模型進行了數值模擬，數值模擬結果詳細地描述了時均流參數和紊動參數的全場分佈，計算所得的壁面時均壓力結果與實驗結果相吻合，獲得了實體試驗難以獲得的流動特徵。可供這種消能工的進一步研究和應用提供參考，特別是可用於檢驗壓力最低點的大小。
  12. One of the main reasons of the step spillway having greater energy dissipation is that the potential energy of the flow continuously transforms to the kinetic energy along the spillway and the kinetic energy partially transforms to the turbulence kinetic energy, and the flow energy is finally dissipated by means of turbulence dissipation

    研究表明，階梯壩面水流能量耗散較大的重要原因之一是由於勢能沿程不斷轉化為動能，而動能又部分轉化為紊動能，進而由紊動耗散的方式而消耗。
  13. Topics include the principles of conservation of mass, momentum and energy ; hydrostatic behavior of floating and submerged bodies ; lift and drag forces ; dimensional anaylsis ; wave forces on ships and offshore platforms ; laminar and turbulent flows

    主題涵蓋質量守恆、動量守恆及能量守恆等原理、浮體及沈體之流體靜力行為、升力、拖曳力、因次分析、船舶及離岸平臺上作用的波力、層流及紊流。
  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. Secondly, to research the phenomena of gas cavity in the oil recess, which was caused by the low oil pressure and to analyze its influence on the dynamic and the static characteristics of bearing

    進而分析由於供油壓力變化導致氣穴現象發生時，對軸承動靜態性能的影響。另外對紊流工況下兩相流潤滑對軸承動靜態特性的影響作了初步探討。
  16. The turbulent flow through the right - angle energy dissipator is simulated by using the transient k - e model, and compared with the experimental results. the calculated result indicates the flow characteristic in detail. the calculated wall pressure is in reasonable agreement with the experimental data

    4利用非恆定k -模型對直彎式消能工的紊流場進行了模擬，並與試驗結果進行了比較，結果清晰地顯示出水流流動過程，獲得流場的變化情況，計算所得的壁面壓力分佈與試驗結果定性一致。
  17. The rigid shaft model and flexible shaft model of the drive train based on the spring - mass - damper system are used to analyze the dynamics of the drive train. a sample grid - connected 300kw hawt is simulated using the analysis method

    在此基礎上以並網型300kw水平軸風力機為分析對象，對其傳動系統在紊流風場作用下的動力學性能進行了模擬計算並分析了計算結果。
  18. The results show that rsm can accurately simulate the movement of the turbulent buoyant flow in reservoir and the anisotropic turbulence due to the thermal stratification. however, rsm is difficult in convergence, bad stability and more time consuming. rsm is suitable when the high accuracy is concerned and geometry boundary is simple

    結果顯示， rsm模型能精確模擬水庫中湍浮力流運動規律和由於溫度分層引起的紊動量的各向異性的特徵，但其收斂性、穩定性及經濟性較差，適用於計算精度要求較高且流域邊界較為簡單的流動。
  19. The distributing of the velocity in the intake port and on the port exit and the distributing of the turbulence kinetic energy are get. the momentum moment flow rate is used to scale the swirl. some advices to improve on the port are put forward

    使用ansys的后處理模塊對計算結果進行處理，得到了氣道內、氣道出口的速度分佈、紊流動能分佈等結果，採用動量矩流率對渦流水平進行了評定，並對氣道的改進提出了一定的建議。
  20. The contents and original points of view are as follows : 1. the complete depth - averaged tubulence model is adopted to compare with the tradional depth - averaged model. the non - uniformity of velocity in z axis is considered in the former. the rigid - lid assumption, which was adopted for long time, is discarded, while the transpot equation of kinetic energy of dispersion is introduced. the 2d term ' s distribution of space - time is calculated

    論文包含的主要內容及創新點有： 1 、引進了完全深度平均紊流模型，與傳統深度平均紊流模型相比，該模型計入了流速在深度方向分佈不均勻的影響；去掉了深度平均紊流計算中長期採用的「剛蓋假定」 ，同時模型通過引進離散動能的輸運方程，計算了二維離散項的時空分佈。
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