長湍 的英文怎麼說

中文拼音 [zhǎng]
長湍 英文
changdan
  • 長 : 長Ⅰ形容詞1 （年紀較大） older; elder; senior 2 （排行最大） eldest; oldest Ⅱ名詞（領導人） chief;...
  • 湍 : [書面語]Ⅰ形容詞（湍急） rapid; rushing; torrential; swiftⅡ名詞（急流的水） rapids; rushing waters
  1. Changes in the gain could occur if the length of the maser changed because of turbulent gas motions.

    氣體的湍流運動使微波激射區的長度改變時，增益就可能發生改變。
  2. It is studied that the formation mechanism of taylor bubble and its control method in gas - liquid two - phase flow, which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering. experiments show that the formation of taylor bubble in gas - liquid two - phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation. thus, the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency

    對大管徑氣-液兩相流動中嚴重影響壓力平衡與機械驅動效率的段塞流生成機制和控制方法進行了研究，實驗證明段塞流的形成是由於空隙率波的大幅度增長使氣泡高度集中，並形成聚並所致。強湍流運動可以抑制taylor泡的形成。因此，通過強化湍流或控制擾動頻率可以對氣泡聚並起明顯的抑制作用。
  3. Among his many contributions to the field of turbulent thermal convection, his work in high prandtl number heat flux measurement played a pivotal role in settling a long - standing issue in the field

    他在湍流熱對流領域中有著眾多的貢獻，尤其是關于高普朗德數下湍流傳熱方面的實驗研究，此研究對于解決這個領域中長期未決的問題起了極為關鍵的作用。
  4. In case of high reynolds number, the turbulence intensity of centreline drifted off its stable course in the sections, where the flow was in the transition

    在大雷諾數情況下，在流動處于發展階段的管長范圍內，流動中心處的相對湍流強度在入口擋環作用下偏離了穩定狀態。
  5. 3. based on the wall equation and k - ? model, the variable c ? and the variable lm were used to improve the numerical simulation of pipe flow with the tripping annulus at the inlet

    在壁函數和-模型的基礎上，採用了變模型常數c _ （ l ）和變混合長度l _ m的方法對入口處帶有擋環的圓管湍流模擬計算進行了修正。
  6. The goal of this paper is to study fully developed turbulent pipe flow. with the aid of the tripping annulus at the inlet, based on the experimental investigation and numerical simulation, detailed researches on a few basic rules in pipe flow have been performed, such as mean velocity profile, relative intensity of turbulence, the log - law, von karman ' s constant and reattachment length, thus filling some gaps in the research work of predecessors and obtaining a far - reaching understanding

    本文的目的就是利用入口擋環進一步探索充分發展的圓管湍流，通過實驗和數值模擬對圓管湍流的若干基本規律，如平均速度分佈、相對湍流強度、對數定律、馮?卡門常數和再附著長度等進行詳細的研究，以填補前人研究中的一些空白，並獲得更深入的了解。
  7. In order to advance the sst turbulence equations at the same rate as the flow equations, a point - implicit scheme is used. the convection term in turbulence equations is discretized using first - order upwinding scheme to ensure more stability in time integration and the positivity of the turbulent variables

    Sst湍流方程求解時，使用點隱式格式進行時間推進從而解除了由於源項存在所引起的時間步長的限制，保證湍流方程和流動方程同步推進時的穩定性。
  8. We have the following results through simulation and experiments : i ) turbulent structure constant of atmosphere decreases with altitude ; ii ) turbulence induced power scintillation decreases with the optical wavelength ; iii ) scintillation of space - to - ground optical propagation is smaller than that of horizontal optical propagation ; iv ) power scintillation of space - to - ground optical propagation increases with wavelength ; results above are accord with existent theory. what ' s more, the last result discovers a new rule

    通過對數學模型和模擬結果的分析，得到以下結論： a ）大氣湍流結構常數隨海拔高度的增加而迅速減小； b ）由湍流引起的光功率閃爍與波長呈反比； c ）空-地激光通信的光功率閃爍小於地面水平傳輸的閃爍； d ）空-地激光通信的光功率閃爍與波長呈正比；上述結果與理論保持一致。
  9. The computational results of strong scintillation with weak turbulence but long propagation length indicate that the number of branch points in distorted optical field has a tendency to saturation

    另外，通過對湍流較弱但傳輸路徑較長的強閃爍條件下畸變光場中出現的相位不連續點數目的計算發現，當湍流效應達到一定程度時，相位不連續點的數目有達到飽和的趨勢。
  10. Various turbulence conditions, ranging from weak to strong, are considered as well as the dependence on turbulence strength, propagation length, wavelength, and the inner scales of turbulence are presented

    計算結果表明，相位不連續點的數目不僅與描述光強起伏量的大氣湍流強度、傳輸路徑長度和傳輸光的波長有關，而且還與湍流的內尺度有關。
  11. The micro boundary layer experiment is carried out from 8mm to 14mm of a 15mm - long micro plane. re numbers vary from 35, 000 to 150, 000 and 4 different mach numbers are selected. some new characters are discovered, such as velocity curve factor is smaller than that of well developed normal scale turbulence boundary layer

    微尺度平板邊界層實驗選取從總長度為15mm的微平板前緣8mm到14mm之間的7個站位， 4種馬赫數， 13個不同雷諾數（從35000到150000 ）的實驗狀態，發現了該尺度下邊界層流動的一些新的特點，如形狀因子比常規大尺寸下充分發展湍流狀態的形狀因子更小等。
  12. The algebraic b - l eddy model, prandtl mixing length model as well as arrhenius finite speed rate chemical reaction combustion model is introduced to above cold - state model

    引入baldwin - lomax代數方程模型、用於剪切層的普朗特混合長度湍流模型和阿累尼烏斯有限速率化學反應燃燒模型。
  13. The numerical results under different methods, especially the simulation of recirculation region and reattachment length were carefully checked and compared. it indicated that the " variable c ? " model could effectively increase the dissipation near the wall and, more over improve the simulation of the reattachment length to close to the experimental results. 4

    比較不同修正方法下的圓管湍流計算結果，尤其是迴流區域和再附著長度的模擬結果表明：變模型常數的-模型有效地的增加了近壁區域的湍能耗散率，使再附著長度的計算結果更接近於實驗結果。
  14. Spectral method and spectral element method are both used in the present dns. the flow is developed from an initial velocity field whose mean and root mean square values are fitted to the experimental data. the reynolds number of the flow is 2250 based on the mean velocity and the radius of the pipe

    本文在空間離散上採用譜方法和譜元法的結合，通過在圓管層流速度剖面上疊加隨機擾動作為初始場的方法，計算了管長為，平均雷諾數為2250的光滑圓管內的湍流流動，建立了圓管內較低雷諾數下速度場和壓力場的數據庫。
  15. Captain greeves is currently representing ifalpa in the low - level windshear and turbulence study group of icao. he also contributed in the development of the observatory s windshear and turbulence warning system of the hong kong international airport

    Greeves機長是國際民航組織低空風切變及湍流專家小組中的ifalpa代表成員，亦有份積極參與香港國際機場的風切變及湍流警報系統的發展工作。
  16. With effective work in chemical kinetics mechanism, turbulent combustion, estimation of the initial and boundary conditions and the combination of the complex chemistry solver technology from the chemkin collection and the flow solver technology of star - cd, the success of the three - dimensional numerical calculation is first obtained in spark - ignited premixed - charge lpg single fuel engine

    理論上以lpg發動機缸內三維燃燒模擬為主要內容，從化學動力學機理、湍流燃燒、確定計算的初始條件三個方面著手，首次將chemkin的處理詳細化學機理的功能和star - cd處理湍流燃燒的長處相結合，成功地對點燃式lpg發動機進行缸內燃燒三維計算，取得了較為滿意的結果。
  17. Abstract : hybrid finite analytic method ( hfam ) and staggeredgrid are applied to calculate the line buoyant jets in cross flows. the phenomenon and development of end - vortex are simulated successfully and the influences of diffuser length and buoyancy on turbulent buoyant jets are analyzed

    文摘:本文利用混合有限分析法及交錯網格，對橫流中有限長線源型浮力射流進行數值計算，成功模擬了端渦現象及其發展過程，並分析了擴散器長度及浮力對湍浮力射流的影響。
  18. With his cooperation, the observatory and ifalpa jointly produced the world s first introductory book on windshear and turbulence specifically for pilots in 2002. the cooperation indeed demonstrated the pilots recognition of the observatory s windshear alerting service. the observatory s online aviation meteorological information service ( amids ) is also much appreciated by airline users

    得到greeves機長的配合，香港天文臺和國際航空公司飛行員協會合作出版了題為在香港出現的風切變及湍流的書籍，是全球第一本為機師編寫的同類刊物，充份表現國際上機師對天文臺提供的風切變及湍流預警服務的肯定。
  19. With his cooperation, the observatory and ifalpa jointly produced the world s first introductory book on windshear and turbulence specifically for pilots in 2002. the cooperation indeed demonstrated the pilots recognition of the observatory s windshear alerting service. the observatory s online aviation meteorological information service amids is also much appreciated by airline users

    得到greeves機長的配合，香港天文臺和國際航空公司飛行員協會合作出版了題為在香港出現的風切變及湍流的書籍，是全球第一本為機師編寫的同類刊物，充份表現國際上機師對天文臺提供的風切變及湍流預警服務的肯定。
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