湍流系數 的英文怎麼說

中文拼音 [liúxìshǔ]
湍流系數 英文
coefficient of turbulence
  • 湍 : [書面語]Ⅰ形容詞（湍急） rapid; rushing; torrential; swiftⅡ名詞（急流的水） rapids; rushing waters
  • 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 湍流 : 1 （急流） swift current; rushing waters; torrent; rapids 2 [物理學] turbulent flow; turbulence; ...
  • 系數 : [數學] coefficient; ratio; modulus; quotient; factor
  1. Results show when velocity of flow remains unchanged in the onflow area and openness of the tube is changed, then resistance coefficient changes obviously

    實驗結果表明：在湍流區域內流速（量）不變時，改變管件開度，阻力系數變化較顯著；改變流量，管件開度不變時，變化不大。
  2. Three dimensional interaction flowfield over high - speed spinning projectile with lateral jets is numerically simulated in this dissertation firstly. complicated shocks wave patterns is analyzed. several factors concerned such as high - speed spinning, attack angle, base bleed and so on, are studied

    本文首次完成了高速旋轉彈丸側噴三維干擾湍流流場的數值模擬，分析了彈丸側噴流場復雜的波系結構，研究了高速旋轉、攻角、底噴等因素對彈丸側噴流場的影響規律，深入分析了旋轉側噴彈丸的空氣動力學特性。
  3. A transfer model is established, which can be used to study the interaction between the land surface physical processes of inhomogeneous region and the structure of atmosphere boundary - layer over urban and rural terrains. the model has simulated surface heat flux, surface temperature, temperature profiles, height of mixture layer and so on. and the differences between urban area, suburban area and rural area have been compared. this model mainly depends on the parameters below : surface albedo, surface roughness coefficient, moisture available coefficient of soil, thermal capacity and thermal diffusion coefficient of errain, cloudage. the result shows that this model can simulate the structure and eigenvalues of atmosphere boundary layer and their changes in a day. parameters used in this model aim at beijing city, and the time is at the beginning of september. to other cities, or other time, the parameters should be adjusted accordingly. in addition, being adjusted, the model can also be used for other homogeneous and inhomogeneous terrains

    模式主要依賴于以下參數和物理量：地面反照率下墊面粗糙度土壤的可含水量下墊面的熱容量和熱擴散系數雲量等參數。結果表明，本模式能合理地模擬不同地表熱量平衡地表氣溫混合層高度湍流交換系數湍流動能位溫廓線等，以及它們的日變化。該模式所取參數主要針對北京市，時間為九月初，對于其他城市，參數應作相應的調整。
  4. Numerical simulation of two - phase turbulent combusti on flow in an afterburner under generalized nonorthogonal curvilinear coordinate systems

    非正交曲線坐標系數值模擬加力燃燒室湍流兩相流燃燒
  5. Abstract : the hot wire anemometer and the ensemble average method are used to measure and study the dispersion turbulent transient feature in a closed cylindrical explosion bomb. the comparison of the dispersion turbulent parameters from different shapes of closed explosion bombs is presented. the relation between errors and numbers in dispersion turbulent measurement with the ensemble average metod is discussed

    文摘:採用熱線風速儀和系綜平均法測定和研究了封閉圓柱形粉塵爆炸罐內揚塵湍流的瞬態特性，並與球形爆炸容器內已測定的揚塵湍流瞬態特性進行了比較，對系綜平均法用於揚塵湍流的測量誤差與測量次數的關系進行了探討。
  6. Using the system designed in this thesis work, flow field calibration of the wind tunnel is accomplished, which covers dynamic pressure drop coefficient, dynamic pressure time stability, axial static pressure gradient, boundary layer, and degree of turbulence, etc. boundary layer measuring principle and method are especially described in detail, the relationship between boundary layer thickness, wind speed setting, and the depth of the experimental section is summarized, and finally the calibration data for th e model center zone under specific wind speed are given

    然後利用本文設計的系統完成了落差系數、動壓時間穩定姓、軸向靜壓梯度、邊界層及湍流度等內容的流場校測。特別對邊界層測量的原理及方法做了較詳盡的敘述，總結出邊界層厚度與設定風速、實驗段深度的關系，然後給出模型中心區一定風速下校正數值。
  7. Gives a calculation formula of the absolute error of specific frictional head losses

    給出了湍流區沿程阻力系數絕對誤差的計算式。
  8. To investigate the space / time distributions and occurrence and evolution of such events, the diffusion pattern over deserts, turbulent transfer features in sandstorm weather, the particle size distribution, mass concentration and its distribution, optic properties, chemical composition and physical factors responsible for the initiation of raising sands, we made integrative observation and sounding of sandstorms deep in the large - scale desert area, including tengri, badanjilin and maowusu, with the items consisting of micrometeorological measurement, 3d wind observation, data from kb - 120 and anderson samplers of mass concentrations of sands with their spectrum, the distribution of aerodynamic particle sizes from the aps3310a, retrieval of aerosols " optic depth from sunphotometer data, assay of the chemical composition by means of neutron activiation analysis ( naa ) and integrated study of all related factors for causing sandstorm to occur, based on the observations of all kinds

    利用所取資料，系統分析了不同強度沙塵天氣條件下沙塵氣溶膠質量濃度和質量濃度譜、粒子譜分佈、光學厚度、化學組分等特徵；綜合分析了影響沙塵起動的諸物理因子在沙塵起動中的作用；用沙塵輸送模式對一次沙塵暴天氣造成的泥雨過程的形成機制進行了模擬。歷史氣象資料統計分析表明，沙塵暴有其高發期（ 4 、 5月）和高發時段（ 14 - 20時） ， 14時到20時之間發生的沙塵暴約占沙塵暴總次數的66 。揚沙和沙塵暴天氣條件下，湍流動量通量和湍流感熱通量都是重要的湍流交換，沙塵暴發生前近地層的超絕熱不穩定對沙塵暴天氣有加強作用。
  9. In this paper, we have discussed the influences of supply air temperature, supply air quantity, supply air turbulence, as well as mixing ratio of supply unit. all of above parameters are important for the extension of the adjacent zone. consideration of all the parameters is essential for a good system design which can ensure the advantage of displacement ventilation

    本文研究了各種送風參數對鄰接區的大小的影響，結果表明：送風溫差、送風量、送風湍流度以及送風口的摻混量等因素對其都有重要影響，在設計時必須仔細平衡這些因素，確定合適的送風口和送風參數，才能使設計更加合理，充分發揮出置換通風系統的優勢。
  10. Based on series fundamental experiments and theoretical analyses, the electro - spray of fuel and charged two - phase turbulent flow are studied systematically and comprehensively in this thesis, which established a research foundation for electro - spray combustion. the research involves charging mechanism, charging and atomization characteristics of fuel, flow field properties of electro - spray, theory of charged two - phase flow and numerical simulation

    本文圍繞燃料的靜電噴霧與荷電兩相湍流射流進行了系統而深入的理論和實驗研究，研究內容包括燃料的荷電機理、荷電霧化特性、荷電噴霧射流流場及荷電兩相湍流理論與數值計算，為荷電噴霧燃燒的進一步研究奠定了基礎。
  11. This article is mainly about the study on the dynamic characteristics of labyrinth seals and concludes the dynamic characteristic of labyrinth seals with the two - control - volume model by the means of turbulent flow theory and calculating fluid mechanics in order to further study on the flowing law of the labyrinth seals

    本論文圍繞迷宮密封流場動力特性系數的研究展開的，採用兩控制容積模型，利用湍流理論和計算流體力學的方法，深入研究迷宮密封內部流動的規律、密封性能，獲得迷宮密封的動力特性系數。
  12. In the paper, some key technique such as low - order modes correction for wave - front error, normalized phase power spectrum, atmospheric turbulent phase structure function, the residual phase structure function after low - order correction and strehl ratio are all analyzed

    提出了利用自適應光學系統校正低階模式波前誤差的方法與理論依據，引入規格化的相位譜，推導了大氣湍流相位結構函數、低階模式校正後的殘余相位結構函數以及斯特列爾比。
  13. Topics discussed included the intensive windshear and turbulence reporting exercises in 2000, experts review of windshear and turbulence warning service, delivery of meteorological information on broadband circuits, weather services under the communication navigation surveillance air traffic management cns atm systems and automated meteorological data relay amdar observation programme, sea breeze induced windshear and world area forecast system wafs transition matters

    討論事項包括二零零零年風切變及湍流報告徵集活動專家對風切變及湍流警報服務的檢討利用寬頻網路傳送氣象資料通訊導航巡測空中交通管理系統下提供的氣象服務及飛機氣象數據自動下傳觀察計劃海風引起的風切變，以及世界航空區域預報系統過渡事宜。
  14. Topics discussed included the intensive windshear and turbulence reporting exercises in 2000, experts review of windshear and turbulence warning service, delivery of meteorological information on broadband circuits, weather services under the communication navigation surveillance air traffic management ( cnsatm ) systems and automated meteorological data relay ( amdar ) observation programme, sea breeze induced windshear and world area forecast system ( wafs ) transition matters

    討論事項包括二零零零年風切變及湍流報告徵集活動、專家對風切變及湍流警報服務的檢討、利用寬頻網路傳送氣象資料、通訊、導航、巡測空中交通管理系統下提供的氣象服務及飛機氣象數據自動下傳觀察計劃、海風引起的風切變，以及世界航空區域預報系統過渡事宜。
  15. The additional sub - scale flux is mainly determined by the average grid value, coefficient of variation and correlations among the meteorology parameters. ( 2 ) the additional sub - scale turbulence flux is composed by two parts, one part is induced by the correlations among the transfer coefficient, surface temperature and soil humidity, another is caused by non - line relationship between the transfer coefficient and roughness, stability

    （ 2 ）非均勻分佈引起的附加次網格地表湍流通量主要由兩部分組成：一是地表次網格上輸送系數和地表溫度、濕度的相關項，另一是由於模式中計算整體輸送系數時，整體輸送系數是地表粗糙度和穩定度的非線性函數所造成擾動項。
  16. Internal waves are a kind of bridge relating the diapycnal mechanical mixing to external sources of mechanical energy : first, internal waves are driven by wind stress and barotropic tide so that large amount of mechanical energy are transported to abyssal ocean with propagation of internal waves ; second, the mechanical energy can directly be cascaded to mixing through instability and breaking of internal waves

    內波是外界提供的機械能與混合之間聯系的橋梁之一，一方面風和潮汐通過激發內波，將能量向深海和大洋內區傳遞，另一方面，內波的不穩定和破碎直接將機械能串級到小尺度湍流混合中去。開展傾斜地形上內波的傳播以及內潮的產生等方面的研究對海洋混合過程的參數化以及混合對大洋環流的影響等方面的研究具有重要的科學意義。
  17. A mathematic model of basic ignition advance angel is built according to double - district burn model and the turbulent flame behavior propagation model. through the emulational calculation, we can get the initial ignition advance angel map graph of the motorcycle ’ s efi system, and the results also showed well consistent with the stand experimental results which adopted the domestic 125ml motorcycle gasoline engine

    在結合汽油機雙區燃燒模型和湍流火焰傳播模型的基礎上，建立了基本點火提前角數學模型，運用在國產125ml摩托車發動機上，模擬得出此發動機電控噴射系統的初始點火map圖。
  18. Secondly, for the first time, by volume average concept and reynolds time - average method, a 3d quasi - single phase mass transfer model of distillation tray is deduced by considering the effects of velocity fluctuation, concentration fluctuation and volume fraction of gas and liquid on mass transfer. a source item sc for interphase mass transfer is considered. by applying conventional method of estimating the interphase mass transfer coefficient, a formula for sc is obtained

    其次，採用體平均概念、雷諾時均化方法結合塔板氣液相互作用的實際情況首次推導了考慮速度、濃度脈動項和氣、液相含率影響的塔板三維擬單相流湍流傳質模型，源相中考慮了氣液相間傳質項sc ，並運用化工中關于相間傳質系數計算的理論，推導了sc的表達式。
  19. In this article, constituting some the equations which reflect the flow law and building and applying many mathematical models of physical and chemical reactions in the the plasma ignition : applying k - two equations turbulence model to calculate the turbulence parameter supplying simplied reaction systerm model and applying eddy break - up model and p - i thermal radiation model. with these reasonable simplied modles, numerically simulating the flow field in the plasma ignition. during the numerical simulation, applying the body - fitted coordinates for the complex geometry of the computional field ; using the mixing format to disperse the equations ; applying simplec algorithm method to solve the equations ; using above models and methods, it can get flow field distribution ; including temperature, pressure, turbulent kinetic energy and its dissipation rate, turbulent viscosity, velocity, density. these results are significant to design and improve the plasma ignition

    本文旨在通過構造反映等離子點火器內部流動規律的基本方程組，建立描述等離子點火器內部的復雜物理化學過程機制數學模型：模擬等離子發生器內部燃燒的-雙方程湍流流動模型；模擬氣體燃料在燃燒時中化學反應的簡單化學反應系統模型；模擬等離子點火器內部湍流預混燃燒的漩渦破碎模型；模擬等離子點火器高溫燃氣及其壁面的p - i輻射換熱的模型等等，對模型進行一定的合理的簡化，然後數值模擬等離子點火器內部流場的流動。
  20. Refined grids were utilized in a large - eddy simulation model for obtaining high - resolution planetary boundary data and analyzing surface layer turbulence. simulation results showed that refined meshes reduced turbulent contributions of subgrid scales, sensitivity of simulation results to sgs parameters decreased, and features of the whole boundary layer were explicitly resolved better. results also revealed flux - profile relationship correctly in surface layer and a good agreement of turbulent velocity characters with observation. therefore, it concluded that the les method was able for simulation of surface layer flow and turbulence, and might be used for further applications

    採用加密網格的大渦模式獲取邊界層風溫場的高解析度模擬結果，並據以分析近地面層大氣的湍流特性。結果表明，較小的網格尺度使次網格湍流貢獻率大為降低，模式計算結果對次網格參數的依賴性減小，邊界層整體特徵得到更好的反映。同時，模擬出的近地面層通量廓線關系及湍流速度特徵與實際觀測結果吻合甚好，表明模式具有反映近地面層平均運動和湍流特性的能力。
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