水流脈動 的英文怎麼說

中文拼音 [shuǐliúmàidòng]
水流脈動 英文
flow fluctuation
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 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...
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  • 水流 : 1. （江河） rivers; streams; waters2. （流動的水） current; water flow; fluent; flow; [水文] stream current
  • 脈動 : [物理學] [天文學] pulsation; pulsing; pulse; ripple; impulsive motion; pulsating; panting; loping...
  1. Numerical research on fins to alleviate draft tube surging

    設置消減壓力脈動穩流片后尾水管數值解析
  2. Thirdly, the correlative coefficient is computed between the pressure fluctuation signal of draft tube and the displacement signal of upper guide bearing, the thrust bearing and the head cover, with this the conclusions on the shafts response due to pressure surge in

    並與模型尾水管壓力脈動試驗結果進行對比?結合流動模擬試驗以及動力特性計算結果，全面分析?評定機組的實際運行狀況，劃定運行區域，為電站合理調度
  3. Water feeding framework takes electromagnetism water valve as administration component and is added relief valve for stabilizing hydraulic pressure ; the system has large, middle and small water valve that changes unlock combination of electromagnetically operated valve, which can get seven different water flux ; if it is necessary, it should adopt microseism water feeding that can make water feeding get stepless timing

    3加水機構加水機構採用電磁水閥作為執行元件，加入調壓閥穩定水壓，系統共設大中小三路加水閥，變化電磁閥的開啟組合，可以得出7種不同的加水流量，必要時採用脈動加水法，可使加水達到無級調速。
  4. The characteristics of high pressure gyratory sprayed pumping discusses is presented, which is applicable in wide range of scope and ground layers, convenient for construction, long durability, wide source of materials. mechanism for subgrade strengthening : complex foundation of cement solid and earth between piles was formed by pulsant load of flowing pressure and spraying flow, water wallop, cavitation phenomenon, water wedge effect, extrusion force and air flow agitation etc so as to enhance foundation bearing force and reduce settlement and deformation

    高壓旋噴注漿技術具有適用范圍、適用地層較廣，施工方便，耐久性好，材料廣闊等特點；其加固地基機理主要是通過流動壓、噴射流的脈動負荷、水塊的沖擊力、空穴現象、水楔效應、擠壓力、氣流攪動等效應形成水泥固結體與樁間土的復合地基，從而提高地基承載力，減少沉降變形。
  5. The sediment - laden flow fluctuating velocimeter designed in this study has a well static and dynamic charateristic

    本文研製的渾水脈動流速儀具有良好的靜、動態特性。
  6. In chapter 3, the subgrid eddy - viscosity model for large eddy simulation is applied to calculate the three dimensions unsteady periodic turbulent flow in yantan francis turbine. the pulsating characteristics of some main physical parameters in flow field are found. the calculated axial water thrust of hydraulic turbine agrees with the model - test value

    第三章採用大渦模擬亞格子渦粘模型，對巖灘混流式水輪機的流場進行三維非定常湍流分析，得到了流場中各物理量的脈動特性，計算出ms的軸向水推力與模型試驗值大小相當；同時論證了對于下機架承重的混流式水輪發電機組可採用其推力軸承負荷作為水電站廠房振動的最大垂直激振荷載。
  7. In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source

    摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。
  8. During the process of studying tectonic origin of gold - bearing breccia bodies in the shuangwang gold deposit, shanxi province, the author apply several modern tectonics theories, such as hydrofracturing, fluid dynamic breccia, tectonic pumping, deformation partitioning, embryonic fracture etc. the paper presents an kind of new model for the formation of hydrofracturing breccia - type metallotectonic, which is one of fracture - vein - breccia series metallotectonics concerning fluid, by deformation partitioning, embryonic fracture, hydrofracturing and rupture - healing

    本文所探討的陜西雙王含金角礫巖體的構造成因研究運用了水力壓裂作用、流體動力角礫巖、流體泵吸作用、變形分解作用和雛形斷裂理論等幾個現代構造地質理論，提出了變形分解作用?雛形斷裂作用?水力壓裂作用?裂開愈合作用四位一體的水壓角礫巖型咸礦構造模型，是與流體動力作用有關的裂隙?脈?角礫巖系成礦構造的一種新的模式。
  9. This paper gives a review on the five analysis approaches of fluctuation pressure on the hydraulic structures and hydromachines : the method of probability and random process, the method of time - space correlation, the method of fitting data, the method of distribution hypotheses on the data of test survey stations, and the hydromechanics method

    摘要綜述了水工建築物及水利機械上脈動壓力的五種分析方法：概率和隨機過程法；時空相關法；數據擬合法；根據實驗測點數據分佈假設法；流體力學方法。
  10. The turbulent flow in open channel is tested with laser - doppler anemometer, in which the longitudinal time average velocity and fluctuating velocity of turbulent flow in open channel under the conditions of the sudden changes of roughnesses at different water depths are measured

    摘要通過激光測速儀，對壁面糙率突變時的明渠紊流進行試驗，測量了糙率突變不同水深情況下明渠紊流的縱向時均流速和脈動流速。
  11. The result indicates that the dynamic stress caused by hydraulic pulse at partial load is one of the important reason of the fatigue and cracks of the runner

    結果表明由於水壓力脈動引起的轉輪葉片上的振動交變動應力是混流式水輪機疲勞破壞的主要原因之一。
  12. Their downcuting velocity accelerates except luohe river round luochuan. the erosion velocity of weihe river round tianshui and jinghe river round binxian reduced, and the lateral erosion velocity of luohe river round luochuan reduced. this may be due to the reduced flow

    天水渭南鎮段渭河、彬縣段涇河的侵蝕速率呈脈動式減小，秦家河段洛河側蝕速率逐漸減小，這可能與河水流量隨時間推移逐漸減小有關。
  13. Through research of automatic dosing system, established by determining automatic dosage in the methods of transmittance pulsation, streaming potential and mathematical model, it can be concluded that the automatic dosing system brought forward in this paper can fulfill requirements of the technics. likely, this system can also be applied for dosing of other chemicals in water plants, chemical dosing of wastewater treatment plants and other similar places

    通過對採用透光率脈動、流動電位、數學模型等方法確定混凝劑投加量建立的自動配投系統的研究表明本文提出的自動配投系統能滿足工藝的要求：同樣該系統也適用於給水處理廠其他藥劑的投加，適用於污水處理廠及其他類似場合藥劑的投加。
  14. The fluid pressure pulse in seawater piping system can cause flow - noise that badly affect the environment and worker in health, even lead to deterioration in operation security of piping system

    海水管路系統流體壓力脈動及其引起的流噪聲對環境及人員的身體健康有許多不良影響，也會降低管路系統自身工作可靠性。
  15. In order to analyze the fluid dynamic characteristic in seawater pipeline system, the test device of fluid dynamic characteristic in seawater pipeline system is set up. in this experiment, the velocity of pressure wave propagation is measured by frequency analysis technique and the measured result is reliable. according to the frequency analysis technique and a basic theory of linear transfer matrix, the pulsation pressure value in pipeline is predicted by the measured values from four pressure transducers

    為了分析海水管路系統內流體的動態特性，建立了海水管路系統流體動態特性實驗臺架；在實驗中利用譜分析技術對壓力波傳遞速度進行了測量，測量結果可信；並利用譜分析技術及線性傳遞矩陣基本理論，通過多個壓力傳感器的測量值預測了管路中的脈動壓力值，實驗結果與理論計算之間吻合很好；分析了流體動態特性實驗臺架本身的自循環特性對海水管路系統中脈動壓力測量的影響。
  16. Experiments and numerical analysis of pressure pulsation for oil and water two phase flow in porous media

    油水兩相滲流壓力脈動的實驗及數值分析
  17. Finally finding that there are two reasons that cause vibration of pipe and noise. the one is the vibration of pump which transfers to pipe and stimulates the vibration of pipe. the second is the stimulating frequency of pulsating water is coherent with the natural frequency of pipe

    最後得出管道的振動主要是由於兩個原因，一是泵的機械振動傳遞給管道，引起管道的振動；二是由於水流的脈動激勵頻率與系統的固有頻率相吻合，引起管道的共振發聲。
  18. Author has investigated the air - volume affect the pressure oscillation in piping system from converse viewpoint. when the structure parameters of the air - volume are some certain value, the pressure oscillation in the exit of the piping system is magnified. this idea makes us a new way to design the power source of high pressure water - jet

    研究表明：當設計的空氣室結構參數（空氣室的容積，安裝位置等）取某組數值時，管道出口端的壓力波動幅值遠大於系統輸入壓力波動幅值，從而為設計高壓脈沖水射流的動力源提供了一條新的思路。
  19. The definition and calculation of fractional dimension is introduced briefly. the pressure fluctuation signals are processed by reconstructing the phase space for sediment - laden and aerated flow. the correlation dimensions are calculated for sediment - laden flow, clear water and aerated flow

    簡要地介紹了分維的定義和計算，運用相空間重構法對含沙摻氣水流脈動壓強信號進行處理，計算了渾水、清水、摻氣三種不同水流狀況的關聯維數。
  20. The fundamental theory and equations for the pressure fluctuation are described and the wall pressure fluctuation is measured. based on the experiment data, the characteristics of pressure fluctuations are analyzed in the three - phase flow of water, air and sand. the effects of air concentration and sediment content on the amplitude and frequency of pressure fluctuations are discussed

    建立了多相流壓強脈動基本方程，闡述了水流脈動壓強基本理論，分析了壓強脈動機理；根據試驗數據，探討了水、氣、沙三相流體的壓強脈動特性，初步得到了高速含沙摻氣水流脈動壓強的幅值特性與頻域特性；提出了脈動壓強強度系數、脈動壓強極差系數與含沙量、摻氣濃度的關系。
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