flow pulsation 中文意思是什麼

flow pulsation 解釋
流量脈動
  • flow : vi 1 流，流動。2 （血液等）流通，循環。3 流過；川流不息；（時間）飛逝；（言語等）流暢。4 （衣服、...
  • pulsation : n. 1. 脈搏，悸動；跳動，顫動；【電學】脈動。2. 【羅馬法】（不痛程度的）毆打。
  1. Fluid noise mainly comes from out put pulsation of rate of flow, the main reason of out put pulsation of rate of flow is the instant high pressure return flow that obturation cubage produced when the big round curve pressure transition. the v trough on the port plate can reduce the fluid noise. in this paper, the author based on the acting of dam a river and condensability of liquid and used matlab language as tool to calculate the v trough on the original port plate and drew out the p - t diagrammatic curve and analyzed its shortcoming and improved the design of original v trough and got that the best size of its angle was 12. 3 and its length was 5mm and the cross section was an equilateral triangle

    流體噪聲主要來源於輸出流量脈動，造成輸出流量脈動的主要原因是閉死容積在大圓弧段壓力切換時產生的瞬時高壓迴流，在配流盤上開設v型尖槽可降低因高壓迴流而引起的流體噪聲，本文以截流作用和液體的可壓縮性為理論依據，以matlab語言為工具，對原配流盤上的v型尖槽進行了理論計算，繪制出p - t圖線，分析了它的不足，並對原有v型尖槽進行了優化設計，得出了v型尖槽的最佳幾何尺寸：配流盤平面上的v型尖槽的兩邊的夾角為12 . 3 ，槽長5mm ，槽的橫截面為等邊三角形。
  2. The substantial alteration by 160 % in the range of the blood flow pulsation can negatively affect the function and plasticity of the blood circulatory system and may potentially lead to the development of hypertonic or hypotonic symptoms in the human body

    在血流脈動范圍內，透過160 %相當可觀的變化，可能對血循環系統的功能及塑性具負作用影響，並且可能潛藏在人類身體導致張力亢進或低壓癥狀的發展。
  3. In the third chapter, the mathematical models of project system have been established, and simulation has been done on the simulink enviroment of matlab software kits. the simulation focus on the effects of main parameters on the dynamic characteristics of speed control system, and the main parameters include viscosity damp coefficient and friction torque of electrical motor shaft, internal leakage coefficient of pump / motor of hydraulic circuits, gas volume of pressure accumulator, viscosity damp coefficient of cylinder piston and different running building floors, etc. at last, theoretical research effects of the flow and pressure pulsation of pump / motor on car speed and oil volume leakage theory are discussed. the fourth chapter of this thesis concerns the research on the key items about hydraulic power control system according to the ens 1 - 2 and other hydraulic elevator standards

    論文第三章針對組成系統的各個模塊進行了機理建模，並且通過matlab軟體中的simulink圖形化模擬環境進行了本課題系統的模擬研究，主要針對影響系統特性的主要參數變化，動態分析系統的輸出特性，在上下行工況中，分析了電機軸系粘性阻尼系數、軸系摩擦力矩、主迴路蓄能器迴路液壓泵馬達內泄漏系數、蓄能器氣體容積、液壓缸柱塞粘性阻尼摩擦系數以及不同運行樓層工況等參數對系統特性的影響；最後對軸向柱塞泵馬達的流量壓力脈動對電梯轎廂速度的影響和蓄能器內油液體積損失機理進行了理論研究。
  4. 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
  5. 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
  6. In this paper, on the basis of the analysis of gear pimp working principle, the mechanism of flow pulsation and methods of reducing flow pulsation are pulsation are studied. the computing formula of transient flow rate and the coefficient of flow pulsation are deduced. the relationship between the gear pump flow pulsation and the construction parameters of the gear is studied

    本文在齒輪泵工作原理和流量脈動產生機理的基礎上，首先從理論上推導了齒輪泵瞬時流量和流量脈動系數的數學模型，分析了齒輪泵的輸出流量脈動與泵齒輪各結構參數之間的關系，並對某型齒輪泵進行模擬分析研究，給出了齒輪泵的流量脈動分析結果。
  7. The problem of noise of the fan is studied with the non - linear theory, and pressure pulsation of axial flow fan ' s inside flow was measured by dynamic pressure sensor, the gas - structure coupled noise of contra - rotating axial flow fan was studied through a new perspective

    摘要用非線性動力學的理論對風機噪聲問題進行了分析，同時運用實驗手段測量了軸流風機流場內部流動的壓力脈動，從全新的角度研究了對旋風機的氣固耦合噪聲。
  8. Secondly, based on the research of flow characteristic of hydraulic motor with multi cylindrical gear, optimal conditions of tooth number are got to minimal the pulsation ratio of motor in the design of hydraulic motor

    其次，通過對圓柱多齒輪式液壓馬達的流量特性進行研究分析，得出使其排量脈動率最小所必須的各齒輪齒數應滿足的設計準則。
  9. Just under this urgent consideration, based on the fact that self - oscillation can produce pulsation of flow, to influence the flow boundary layer, thus to increase convective heat transfer coefficient, it is necessary to devote to the mechanism of self - oscillation and apply it to a heat exchanger

    正是在這種迫切要求下，基於自激振蕩能產生脈沖流動而影響流動邊界層從而提高對流換熱系數來強化換熱的考慮，需要開展對自激振蕩的機理及其應用的研究。
  10. The impact on the muffler performance is realized by the high - speed pulsation gas flow, which regenerates noises and strikes the acoustic elements of the muffler such as the pipe run, the body case and the separator plate to arouse the vibration radiated noise

    氣流影響消聲器性能的主要原因是發動機排氣的高速脈動氣流再生噪聲，其次是這種氣流會沖擊消聲器的管路、殼體、隔板等聲學元件，進而激發振動輻射噪聲。
  11. The growing and collapsing of gas bubbles and cavitation not only damage the flow continuity and reduce the working mediums physical performance, but also influence the propagation of pressure pulsation

    氣泡和氣穴的產生及破滅不僅破壞了流體的連續性、降低了介質的物理特性，而且還會影響壓力脈動波的傳播過程。
  12. Increasing original resistan coefficient of the secondary air duct can improve the adjusting performance of air damper, and inhibit pulsation of the flow rate

    增加二次風道的原始阻力系數，可以使風門的調節特性得到改善並抑制流量脈動。
  13. The analysis about the central gear ' s mentions impact on the flow pulsation of the five poles of the external meshing gear integral pump

    中心輪齒數對五極外嚙合齒輪復合泵流量脈動的影響分析
  14. For reference, the smoking of a cigarette leads to the increase of the width of the range of blood flow pulsation to 0 cm / sec ? 21. 0 cm / sec

    提供參考，吸一支煙導致對0厘米秒21 . 0厘米秒之血流脈動之血范圍寬度增加。
  15. Flow pulsation of hydraulic pumps is the source of pressure and flow pulsation in hydraulic systems. one method to reduce the pressure and flow pulsation of system is to reduce the flow pulsation of hydraulic pumps

    液壓泵的流量脈動是液壓系統存在壓力及流量脈動的根源，消除液壓系統壓力及流量脈動的方法之一是減小液壓泵的流量脈動。
  16. At last considering the flow pulsation as objective function, optimization of the parameters of the gear using ga method is brought forward and an optimum model is presented to achieve the optimal parameters of the gear that make the flow pulsation lowest

    最後以流量脈動為目標函數，採用遺傳演算法對齒輪泵結構參數進行了優化設計，建立了齒輪泵參數優化數學模型，給出了使輸出流量脈動最小的齒輪泵最優參數。
  17. This test shows that after the 20 minutes of exposure of the human subject to the mobile phone radiation the blood flow pulsation “ jumped ” from the average range of 1 cm / sec ? 6. 6 cm / sec ( fig. 1 ) to the much higher average range of 0 cm / sec ? 14. 4 cm / sec ( fig. 2 )

    本試驗顯示人類實驗對象暴露在行動電話輻射20分鐘之後，血流脈動自1厘米秒66厘米秒（圖1 ）之平均范圍比較跳到0厘米秒14 . 4厘米秒（圖2 ）之平均范圍高。
  18. As external gear pump has the most serious problem of flow pulsation, how to analyze the flow pulsation of gear pump and to optimize the construction parameters of gear pump is especially important for the design and performance improvement of gear pump

    在液壓泵中，以外嚙合齒輪泵的流量脈動最大，因此對齒輪泵流量脈動進行分析，以減小流量脈動為目標，對齒輪泵的結構參數進行優化設計，從而為齒輪泵的設計及齒輪泵性能的提高提供理論基礎。
  19. Flow pulsation of a specific gear pump is analyzed and the results are given. according to the testing requirement of pump pulsation, the measurement device of the testing flow pulsation, based on iso 10767 - 2 measurement standard, the measurement device of flow pulsation testing is built. high speed dynamic pressure transducer is used to record the pressure pulsation in the pipeline

    然後根據齒輪泵流量脈動的檢測要求，採用iso10767 - 2測試方法，搭建了齒輪泵流量脈動測試裝置，採用動態壓力傳感器，對齒輪泵系統進行了壓力脈動測試，利用壓力脈動與流量脈動的比例關系，對齒輪泵流量脈動分析結果進行了驗證。
  20. The accumulator in the jig alternating - flow hydraulic system is very important to increase efficiency, reduce pressure pulsation and keep the system having a good dynamic process

    摘要蓄能器是跳汰機系統的重要組成部分，對于提高效率、減少壓力波動、保證系統有良好的動態過程具有重要作用。
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