pressure of water flow 中文意思是什麼
pressure of water flow
解釋
流水壓力-
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。 -
Finite volume method is appilied in numerical modeling of the flow in no - pressure tunnel of high water reservoir in this paper. i select standard k - turbulence modeling that put forward by launder and spalding in 1972 by weighted poly - turbulence modeling. the difficulty is that there is free surface in flow, but free surface problem ' s calculating region is indefinitely
本文利用有限體積法對高水頭下水庫無壓泄水洞水流進行了紊流數值模擬，根據多種紊流模型的優缺點進行比較，選擇了launder和spalding於1972年提出的標準的k ?紊流模型。 -
In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討，取得以下主要成果：一、結合小灣工程導流洞改建，對高水頭（ 252m ） 、大泄流量（ 1400m ~ 3 s ）條件下旋流式豎井中的水流運動特徵進行了比較全面的測量，包括空腔形態、徑向流速分佈及井壁壓強等；二、提出了豎井空腔段螺旋水流水力計算方法，其計算結果與實測值吻合良好；三、利用試驗與計算結果，對旋流式豎井的消能機理進行了探討，對豎井各部分的消能能力有了總體認識；四、對豎井下部消力井的合理井深進行了優化試驗研究，發現消力井合理深度為0 . 9d左右；五、通過試驗研究，歸納出豎井水流總摻氣量估算方法，為導流洞排氣方案的設計提供了參考依據；六、在高水頭、大流量條件下，豎井空腔段下部流速很高，盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓，但空化數依然較低，因此豎井的空化空蝕始終是工程界關注的重大問題。 -
Abstract : through a series of hydraulic model tests for researching actual power tunnel operation, a conclusion is reached that in order to get a better flow pattern the profile of the wate - carrying structure should be adapted to the variation of water streamline shrinkage, flow velocity and pressure intensity. the configuration and dimension of the kinetic energy dissipator should be selected carefully to make the water tunnel safe and reliable at different levels of diversion dischage
文摘:針對實際工程中的發電引水隧洞運行的各種工況進行了水工模型試驗研究，指明要獲得良好的水流流態，過水建築物各部位結構輪廓的造型應適應水流流線的收縮、流速及壓強的變化；為使引水隧洞在各級引水流量下能安全可靠地運行，需慎重確定洞內消能工的體形和尺寸。 -
( 4 ) water flow model experiment is made and hydraulic pressure variation is observed, " the detainment and displacement " of semipervious aquifers in the process of decreasing water is also studied
（四）模擬二元結構土層，進行土樣滲流試驗，觀測水壓的變化，研究弱透水層承壓水在降水過程中的「滯后和位差」現象和問題。 -
According to the practical geological model of slope, by means of the finite element analysis, from the constitutive equations of the elastoplasticity and the viscoelasticity - viscoplasticity, the process and mechanism for progressive failure of the locked segment of rockmass are quantitatively revealed and simulated during the rupture, deformation, destruction, and failure of highsteep slope rockmass, and the dynamics driving the motion of rocky landslide with violent starting velocity by high pressure water flow is dealed with
根據邊坡實際地質模型，基於彈塑性與粘彈-粘塑性理論的本構方程，通過有限元模擬分析，定量地揭示和模擬再現了高邊坡巖體破裂、變形、破壞及失穩前後鎖固段巖體漸進性破壞的機制和過程，探討了高壓水流作用下滑坡啟程劇動的破壞機理。 -
Based on optimization theories of genetic algorithms and the linear programming, a series of optimal design mathematics models and methods of water transmission conduits and water distribution networks have been presented, in the light of their characteristics. the results are as follows : 1 the linear programming models and calculations of the pressure gravity conduit, the gravity pressure conduit and channel, the pressure conduit with pump station and the pressure conduit in considering pump station flow variations are presented respectively
本文針對不同類型的輸水管線和配水管網系統的特點，應用遺傳演算法和線性規劃等優化設計理論和方法，對其優化設計問題進行了較為系統的研究，成果如下： 1分別建立了重力輸水管道系統、重力輸水管渠系統、泵站加壓輸水管道系統以及考慮流量變化的泵站加壓輸水管道系統優化設計的線性規劃數學模型，並提出了計算方法。 -
Research on water hammer with gas in pressure conduit system through physical experiments, researches on pressure conduit system with gas releasing and liquid column separating, which consist of observing flow patterns, testing the conditions under which liquid column separation brings into existence and the water hammer in water interception collision, and studying effects resulting from gas content and different water velocities in pipeline, was done
3 、輸水管道系統中含氣水錘研究通過物理試驗，對有壓輸水管道系統中的氣體釋放與液柱分離進行了研究，觀察其流態、測試液柱分離發生的條件及斷流彌合水錘壓力，研究了含氣量、流速等參數對液柱分離的影響。 -
Based on experimental result of energy dissipation and scour protection for downstream of spillway at yu jian kou power station, this paper discusses the flow characteristics, aerated characteristics of flaring gate pier for low dam pivot, the influence on pressure of dam surface and the result of energy dissipation for flaring gate pier. it is put forward to be an available method to solve the problems of energy dissipation and scour protection for depth of covering strata, poor geologic condition and weakness of resistance to scour capability under reasonable use of flaring gate piers and auxiliary dissipaters. thus, a new method is obtained for release of floodwater and energy dissipation of low dam pivot which are provided with low water head, great unit discharge and low froud coefficient. it may be used for reference for design and test workers
結合魚劍口電站壩下消能防沖試驗研究成果，對低壩樞紐寬尾墩的水流特點、摻氣特性、寬尾墩對大壩泄流能力和壩面壓力的影響以及寬尾墩的消能效果等問題進行了初步探討，提出了合理地使用寬尾墩結合輔助消能設施可有效地解決壩下覆蓋層深，地質條件差，抗沖能力弱的低壩樞紐的消能防沖問題，從而為具有低水頭，大單寬流量，低佛氏數特點的低壩樞紐泄洪消能開辟了一條新途徑，可供有關低壩樞紐設計與試驗工作者借鑒與參考 -
The research on vertical conduit flow of gas - liquid two phases in wellbore aims at the classification, transition and judgement of flow pattern, according to the pressure distribution of oil - gas - water mixture in wellborne, by which the reliable basis will be provided for understanding of well performance, rational control / monitoring and regulating of well flow regime and the design of gas lift
摘要井筒兩相管流研究的主要目的是用於井筒內流體流型的劃分和流型的轉變與判斷，其基本依據在於井筒內油氣水混合壓力的分佈狀況；在了解了井筒混合流體的壓力分佈狀況之後，能夠為掌握油井生產規律、合理控制和調節油井式作方式及氣舉設計提供可靠的依據。 -
Simulation analysis of the flow pressure characteristic for the shearer water - spraying system
採煤機噴霧滅塵系統流量壓力特性模擬分析 -
It is more accurate than traditional method at the aspect of calculating head loss, pipe flow and node pressure of hydrant. this mathematic model can also be used in the inside and outside of water supply piping calculation and it is excel hardy cross - piping calculation
該方法在計算水頭損失、管段流量、消火栓節點壓力等方面比傳統方法要更加準確，也可被借鑒到室內或室外的給水管網計算，並優于常見的哈代-克羅斯管網平差方法。 -
The results show that while the mass flow of refrigerant is 1. 85g / s, the inlet temperature of refrigerant is 18. 9, the evaporating pressure is 0. 62mpa, the mass flow of water is 31. 1g / s, and the inlet temperature of water is 36. 9, the refrigerant of miniature evaporator wholly vaporizes in the tube, and the heat transfer rate is 342w. it achieved the demand of design
經過實驗測試，當製冷劑質量流量為1 . 85g / s ，製冷劑入口溫度為18 . 9 ，蒸發壓力為0 . 62mpa ，水的質量流量為31 . 1g / s ，水的入口溫度為36 . 9 ，此時，螺旋管蒸發器內製冷劑完全蒸發，換熱量342w ，達到了微型蒸發器的預期設計要求。 -
In consideration of the characteristics of big pressure changes in near wellbore area of low permeability reservoirs, based on experimental result, a single well percolation mathematical model that the reservoir physical property changed with effective stress was established, equations were given for calculating the elastics and elastoplastic reservoirs under the condition of oil and water flow and an analytical equation was also given for calculating the reservoir production and bottom - hole flowing pressure
摘要針對低滲油藏近井地帶壓力變化幅度大的特點，以試驗結果為基礎，建立了考慮儲居物性隨地層有效應力變化的單井滲流數學模型，給出了油水兩相流動下的彈性和彈塑性儲層的數值解計算公式，以及彈性儲層的產量和井底流壓解析表達式。 -
In order to calculate the high external water pressure, the rock seepage field and external water pressure coefficient should be treated in detail. concentrated on the questions of high external water pressure and flow of the deep - lying tunnel, the basic theory and method calculating external water pressure are systematically studied, the high external water pressure of jinping cascade 2 hydropower station is analyzed and studied in detail
本文在總結前人研究成果的基礎上，圍繞深埋隧洞的突涌水和高外水壓力問題，系統地研究了深埋隧洞襯砌水荷載和外水壓力的作用機理及計算方法等理論，並對錦屏二級水電站深埋引水隧洞的外水壓力問題進行了詳細的分析和研究。 -
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。 -
The turbulent characteristics of high - velocity sediment - laden and aerated flow are more other than the clear water flow of single - phase and current of low speed. in a special circulating system with high velocity flow, some flow parameters such as boundary shear stress and pulsation pressure are measured. an investigation is made on the turbulent characteristics of the three - phase flow of water, air and sand
本文針對高速含沙摻氣水流的運動規律有別于低速水流及清水單相流，在自己研製的高速渾水循環系統中，通過對高速含沙摻氣水流壁面剪切應力和脈動壓強等參數的量測，分析了水沙氣三相流的紊動特性，探索了泥沙對固壁的磨蝕機理及減蝕措施，其主要內容包括以下幾個方面： 1 -
Corresponding to the correct water hammer mathematic model ( 3 ), the character difference equation is by comparing the new mathematic model with the old mathematic model, the last calculative part of paper argues the falseness of the current water hammer mathematic model, makes use of the improved character line method to analyze the correct mathematic model ( 3 ), studies all kinds of facts " impact on water hammer pressure value and water hammer phenomenon attenuation, points out that, in the long pipeline system, the subarea calculation of head loss along with flow rather influences the calculative results of water hammer pressure, advices to take the subarea calculation of head loss along with flow into account in the water hammer calculation of the long pipeline system
對應于正確的水擊數學模型（ 3 ）的特徵差分方程形式如下c ，弓+吼川一c ，唱一幾弓扮幾rv另卜川= o幾代+吼川一幾唱一吼嶸{一c :腳丸}唱} ? 「本論文在最後的計算部分，通過對新老數學模型的數值計算比較，進一步論證了當前水擊數學模型的不正確性。並且應用改善了的特徵線法對正確的數學模型（ 3 ）進行了計算分析，研究了各種因素對水擊壓強值和水擊現象衰減的影響，指出在長管道系統中，沿程水頭損失的分區計算對水擊壓強的計算結果影響較大，建議在長管道系統的水擊計算中應按分區進行沿程水頭損失的計算。 -
Experiment proved that the calculation model could represent the flow of water in networks reliably. a topological - based method for determination of source - serving districts and drawing pressure - contour in multi - source networks was developed, a matrix describing topological relationship between lines and joins in the multi - source networks was set up for the computer - aided analysis. graph display of source - serving districts, dividing lines and pressure - contour was performed
在水力計算的基礎上，提出了利用拓樸理論進行管網的工況分析的方法，確定了多水源供水管網各水源供水區域、供水路徑；實現等水壓線的自動繪制；建立了給水管網余氯濃度的分佈模型；進行了給水管網事故對策分析。 -
The simulation results indicated that the air flow, airside pressure drop, water flow and flux of heat exchange in water side decreased with the increase of frosting time, and the airside pressure increased
模擬結果表明，隨著結霜量的增加，空氣側換熱器的換熱量減小，風量也將逐漸減小，而阻力卻迅速增加；水側換熱器的換熱量減小，水流量也減小。
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