流體的阻力 的英文怎麼說

中文拼音 [liútǐdezǔlì]
流體的阻力 英文
fluid resistance
  • 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...
  • 體 : 體構詞成分。
  • 的 : 4次方是 The fourth power of 2 is direction
  • 阻 : 動詞（阻擋; 阻礙） block; hinder; impede; obstruct
  • 力 : Ⅰ名1 （力量; 能力） power; strength; ability; capacity 2 [物理學] （改變物體運動狀態的作用） forc...
  • 流體 : [物理學] fluid; fluor流體力學 fluid mechanics; hydromechanics; 流體生物學 hydrobiology; 流體運動學 hydrokinematics
  • 阻力 : 1 （阻礙事物發展的外力） obstruction; resistance 2 [物理學] resistance; drag; drag force; nowel; ...
  1. Under favourable circumstances hydrodynamic pressure may be generated to oppose the flow due to the applied pressure.

    在有利的環境下，可產生流體動壓力來阻止由所加壓力引起的流動。
  2. The more streamlined an object is, the less drag it encounters.

    一個物體越呈流線型，它遇到的阻力就越小。
  3. By using the larger magnetic permeability, magnetic fluid was used to improve the magnetic circuit efficiency in torque motor, enlarge the output torque and displacement of torque motor, and the output flow of servo valve. correspondingly, the ability of noise - overcoming and system damping was enhanced due to the property of magnetic fluid. as a result, the stability of servo valve and servo - control system can be improved

    由於磁流體具有較大的導磁率，可提高力矩馬達磁路效率、增大力矩馬達的輸出力矩和位移，從而增加伺服閥的輸出流量;同時，利用磁流體的粘度特性，可增強力矩馬達阻尼及抗干擾能力，從而增強伺服閥及伺服控制系統的穩定性。
  4. The stress condition ; overall stability ; effect of filling gravels into the hole of the block of the precast concrete interlocking blocks in the water flow during the flood period as well as the resistance parameters of the blocks are studied through experimental simulation ; in which a comprehensive analysis is made on the mechanical stability and the anti - erosion properties of the blocks, and then the requirement and the safety degree of the gravel filling are given

    摘要通過試驗模擬研究了預制混凝土連鎖塊在洪水期水流中的受力狀況、整體穩定性、孔內填充碎石的作用及連鎖塊阻力參數，綜合分析了連鎖塊結構的力學穩定性和抗沖性，給出了碎石填充的要求及安全度。
  5. Computational fluid dynamics ( cfd ) techniques are used to study and understand fluid behavior in tunnels. by simulating complex specific operational cases, we can educe velocity or flux distribution in tunnel under different ventilation and resistance situation and determine the favorable operational procedures of the erlang mountain tunnel ventilation in a fire case. comparison has been made between a simulation and experiment for some cases in order to prove the cfd model is powerful, so that enables the study of cases for which experimental data is not available

    採用本文將隧道內的氣流看成是理想流體的一維恆定流動，通過對二郎山特長公路隧道半橫向通風系統建立隧道內的空氣動力學模型，利用計算機進行數值分析與計算，得出發生火災時，不同通風阻力條件下隧道中的風速分佈及流量分佈，並通過實驗室隧道模型實驗進行驗證與修正，依據研究結果給出了二郎山半橫向通風隧道的火災控制方案，從而解決了二郎山公路隧道通風對火災的控制問題，同時為半橫向通風公路隧道的火災通風提供科學的方法。
  6. Fluid network was divided into a lot of independent loops. through changing states of valves, i got pipe flux and pipe pressure drop. based on pressure balance equation, i built the differential equation system, solved the differential equation system, and acquired resistance coefficients of pipes and component

    並將流體網路圖分解為一個個獨立迴路，通過改變閥門的狀態，來獲取迴路各管段流量和壓力損失，根據迴路壓力平衡方程，建立方程組，對方程組進行了求解，解出了各未知管段、流體器件的阻力系數。
  7. For the case of transporting suspended fine sand, a single - fluid model is used to calculate the flow resistance by solving the navier - stokes equations. the computed agrees well with the measured. and for the case of transporting medium - sized sand, a two - layer model is used and the model produces a good agreement with the experiment data

    對管道輸送細沙懸移質的流場，採用單流體模型進行數值求解n - s方程，計算結果與實驗資料相吻合;對具有分層流動的中沙管道水力輸送，採用兩層代數模型進廳了計算分析，阻力損失的預測結果與實驗吻合較好;最後對管道輸送粗沙的阻力特性和運動機理進行了分析探索，提出了進一步研究的方向。
  8. Abstract : in light of thicker grain and smaller viscosity of debris flow, a segmented simulation of the debris flow with flume is presented. for the first time. more difficult resistance similarity is brought about by geometric rate without excessive coarsing and discontinuous similarity of sand grain composition in model is eliminated with different grain scale. on this basis the density similarity and sand conveying similarity are achived. the method presented is verified through a model test case

    文摘:針對水石流顆粒粗，粘性小的特點，提出了利用水槽進行分段模擬水石流的設想，首次通過幾何變率解決難度較大的阻力相似問題，改變了以往過度加糙的方式;通過變粒徑比尺的方法消除了模型沙級配不連續相似的問題，較好地實現了固體物質級配相似，達到了泥石流的密度相似和輸沙相似.通過水槽概化模型試驗實例，對本方法進行了驗證
  9. In chapter 2, an accurate modified reynolds equation is derived. the modified reynolds equation is solved numerically with the finite different method, the generated axial thrust force, minimal mucus film thickness, load capacity of hydrodynamic pressure and circumferential friction under the rectangular screw are obtained. at last, using numeral methods and coordinate graphs, the influences of rectangular screw parameters on the generated axial thrust force, minimal mucus film thickness, load capacity of hydrodynamic pressure and circumferential friction are studied and analyzed

    第二章，首先推導了非牛頓流體的變形雷諾方程，化簡了雷諾方程，得出了矩形螺紋下有限差分方程；還推出了矩形螺紋作用下軸向摩擦牽引力、粘液膜厚度、粘液膜承載能力、周向摩擦阻力無量綱表達式，最後用數值計算方法求解，通過坐標圖分析了矩形螺紋參數對軸向摩擦牽引力、最小粘液膜厚度、粘液膜承載能力、周向摩擦阻力的影響。
  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. In order to set up the dynamic model of swimming micro robot, this dissertation builds up the statics model and analyses the micro motion amplifying performance of micro robot mechanism, builds up the vibration model of micro robot and analyses the vibrating performance without and with damp, researches the propelling force of driven wing and the resistance of micro robot in liquid based on the theory of flat board resisting stream, builds up the dynamic model of swimming micro robot for the first time in nation and analyses its swimming performance which is influenced by driving signal frequency, amplifying performance of main machanism, area of driven wing, character of fluid and so on. this dissertation manufactures the micro robot and sets up the experimental environment and tests the amplifying effect and the vibrating performance

    本文建立了主體機構靜力學模型，研究了主體機構的結構參數對微位移放大性能的影響；建立了主體機構振動模型，研究了主體機構在無液體阻尼和有液體阻尼情況下的振動特性；根據流體力學平板繞流理論，研究了驅動翼產生的推進力和微機器人在流體中受到的阻力；在此基礎上國內首次建立了泳動微機器人的動力學模型，並對模型進行了深入的研究，詳細闡明了驅動信號頻率、主體機構放大性能、主體機構振動特性、驅動翼面積、液體性質等因素對微機器人泳動特性的影響。
  12. The bionic non - smooth technique was applied to the centrifugal water pump to modify the liquid flow structure in the pump to reduce the hydraulic drag in the liquid - solid interface, resulting in the enhancement of the pump efficiency

    摘要基於仿生非光滑技術，通過改變離心式水泵中液體的流動結構降低固液界面的阻力，研究了水泵的增效問題。
  13. Valves - test of flow resistance using water as test fluid

    閥門.用水作為試驗流體的流動阻力試驗
  14. Valves - test of flow resistance using water as test fluid ; german version en 1267 : 1999

    閥門.以水作試驗流體的流動阻力試驗
  15. In experimentation, the project adopts computer, data collection board, sensor and software. finally, the theory analsis is validated that the contact of noise elimination, velocity of flow, resistance loss

    在試驗中，採用了以計算機、數據採集卡、傳感器和處理軟體得到阻性消聲器的動態特性，從而驗證了阻性消聲器的消聲量、氣體流速和阻力損失之間聯系的理論分析。
  16. Put up the cold experiment of the three - phase fluidized bed with multiple orifice balls, research on the influence of the superficial gas velocity, the filler static height and the liquid density on the resistance character and the desulfurized efficiency, summarize the virtue of multiple orifice balls

    摘要對多孔球為填料的三相流化床進行冷態試驗研究，研究不同工況下氣體空塔流速、填料靜止高度、噴淋密度等因素對流化床阻力特性和脫硫效率的影響。
  17. However, a positive osteogenic effect depends on sufficient stimulation provided in terms of the intensity of the exercise workload, duration of the exercise, frequency of training, length of the training period, and site affected by the physical activity

    大體上，阻力運動訓練、承重型的耐力訓練、甚至於日常步行訓練均有助於減緩骨質流失的速度，然而欲得到足夠的骨骼刺激效果仍需視所採用的運動型態與運動量而定，而且養成長期持續運動的習慣才能確保正面效果的維持。
  18. In this respect, it tends to be an alternative of towing tank tests. the solution of 3d viscous flows around a ship in steady straightforward courses is capable of capturing more nearfield flow features than model tests and predicting viscous resistance with high accuracy, whilst for viscous flows around a ship in maneuvering motions such predictions are only in general good

    三維船舶粘性流計算方法，具有準確捕捉船體周圍粘性流動細節包括船模試驗難以測量的流動形態的能力，已成功地應用於船舶快速性方面的阻力預報；在船舶操縱性方面，這類方法雖處于初始發展階段，但也已獲得重大進展，具有精確預報船舶操縱水動力的潛力。
  19. For shutters, the results show : 1 ) according to the formula p =, the theoretical value of is calculated by the effective velocity of the flow, and its engineering value is calculated by the arriving velocity of the flow, the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities. as a result, the declining angle of 30 擄 or less is recommended in some places which need small wind velocity, such as broadcasting studio and library, and the declining angle of 45 擄 or less is recommended in places which need big wind velocity, such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities. the range of b / h from 0. 8 to 2. 0 and the optimum value 1. 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1. 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation

    數值模擬採用fluent軟體，計算結果用excel進行處理，通過對大量數值工況進行數值模擬計算，結果表明：對于單側百葉風口，計算表明： 1 ）對于公式p = （ ~ 2 ） 2 ，的理論計算值中定義為流體流經百葉風口內部時的速度，即有效速度，而工程上常使用流體的來流速度來計算，計算表明，的理論計算值與工程應用值的關系為（ _ （理論） ） （ _ （工程） ） = 0 . 813 ； 2 ）當來流速度一定時，擋板傾斜角度越小，壓力損失越小、出口速度越小；因此在要求進口風速比較小的場所，如播音室、圖書館等，宜採用擋板角度30的百葉風口；在要求進口風速比較大的場所，如電影院、辦公室等，百葉擋板的角度應選45 ； 3 ）當來流速度一定時，百葉擋板的擋板寬度b與擋板間距h的比值b h越大，壓力損失越大，出口速度越小，計算表明，鑒于壓力損失、出口風速、板間形成渦流區的大小，百葉擋板的b h值取0 . 8到2 . 0之間， b h = 1 . 2為最佳值； 4 ）當來流速度一定時，在計算的條件下，當百葉擋板寬度b = 40mm時，百葉擋板的阻力系數最小，考慮到渦流區等的影響，建議選用10mm b 50mm的百葉擋板；西安建築科技大學碩士學位論文5 ）百葉擋板的厚度取為1 . sinln為好; 6 ）百葉擋板的入口側可選用具有傾斜度的楔形擋板來代替矩形擋板，利用其較好的導流作用，可得到更好的出流效果。
  20. Full port design produces minimum flow restriction with the lowest possible pressure - drop

    全埠（全流道）結構對流體的阻力最小，因此壓降也最小。
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