液流壓力 的英文怎麼說
中文拼音 [yèliúyālì]
液流壓力
英文
flow stream pressure-
In this paper a kind of cardio - cerebral arterial bifurcation vessel hemodynamic characteristics are studied with the boundary element method, and the blood flowing velocity vector distributions have been calculated. in addition, the flow field distribution and the pressure on the particle surface are also calculated, when there is flow - round particle at the place of bifurcation, the move tendency of the particle is judged, the possible reasons of causing the atherosclerosis, thrombus, angioma are analysed
本文用邊界元方法研究了一類典型心腦動脈分支血管中血液流動的流體動力特性,計算了分支血管血液流動的速度矢量分佈,同時計算了分支附近有多個顆粒狀繞流物時血液的流場分佈,及顆粒物所受壓力狀況,給出了顆粒物的運動趨勢,分析了引起粥樣斑塊病變、血瘤、血栓的可能原因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。In forced convection the movement of the fluid or gas is caused by an external agent which gives rise to pressure differences.
在強制對流中,液體或氣體的運動是產生壓力差的某種外營力造成的。This ultrafilter adopts dissymmetrical semipermeable film which is made from macromolecule material with special process, the raw liquid flows under pressure, inside or out side the film, the macromolecule substance and colloid particles in the raw liquid are clogged at the film suface and are brought away by circulating raw liquid. then the raw liquid becomes inspissated, and further more, the substance in liquid is separated
本設備是以高分子材料採用特殊工藝製成的不對稱頭透膜,在壓力作用下,原液在膜內或膜外流動,其中的高分子物質,以及膠體粒子則被阻止在膜面,被循環流動的原料帶走而成為濃縮液,從而達到了物料的分離濃縮和提純的目的。This paper supplied a new way through variable frequency variable speed ( vfvs ) to change its output flow rate and adding a constant - pressure - drop valve, which could solve the defects in hydraulic pressure servo control system, such as low efficiency in control system, short life, poor ability in resisting pollution, low efficiency in driving system and flow rate, pressure pulse. and this way was proved to be effective
本論文針對傳統伺服控制系統效率不高、元件壽命短、抗污染能力差、驅動系統效率低、存在流量及壓力脈動等缺陷,利用先進的交流變頻調速技術改變液壓泵轉速的容積調速新方法,提出了在液壓系統中加一個定差減壓閥的新思路,較好地解決了液壓伺服系統存在的上述問題。Through the special studies on impacts to atomizing and humidifying effect from such factors as the firing pin type, centrifugal structure, higher spraying pressure, less aperture, initial water temperature and original state of the air, some conclusions are obtained, such as : the centrifugal nozzle with firing pin type, high pressure and little aperture has bigger air eddy and atomizing angle. the spaying liquid has high velocity. the droplet is small, and the heat and mass transfer velocity is high
通過對撞針型結構、離心式結構、較高的噴水壓力、較小的噴嘴孔徑、噴水初溫及待加濕空氣初狀態對霧化加濕效果的作用原理的重點分析,得到:撞針型高壓小孔徑離心式噴嘴具有較大的空氣渦與霧化角,噴出的液體流速高、液滴小、水與空氣傳熱傳質速率高,撞針型結構提高了霧化加濕效率,高壓小孔徑的特點為霧化加濕提供了較大的能量,而噴水初溫的升高會減小水的粘性力和表面張力,從而優化加濕效果。Fluid mechanics hydraulic transmission
流體力學及液壓傳動With the deveiopment of hydraulic technology, hydraulic system and hydraulicequipment are more complicated, hydraulic technology is more widely and morecomp1icatedly used in agricultural machine and their malfunction is more difficu1t to bedetected. fault diagnosis of hydraulic system is not as apt to be observed as that of themechanical equipmeflt or is not as easy to be detected as that of electric equipmeflt bymu1tipurpose meter or other meters. flux meter gage and pressure gage ca n ' t meet the needof fault diagnosis for hydraulic system because its working medium and workingcomponents are hiding inside the sealed vessel
隨著液壓技術的發展,液壓系統及液壓設備越來越復雜,液壓技術在農機上的應用也變得廣泛而復雜,農機液壓系統的故障診斷也越來越困難,液壓系統的故障診斷不象機械設備那樣直觀,也不象電氣設備那樣通過萬用表等儀器測得,液壓系統的工作介質和工作部件都在密閉的容腔內,流量計、壓力表等測量儀器遠遠不能滿足故障診斷的需求。Oilhydraulic ; hydraulic pumps and hydraulic engines, geometrical displacement - volume, rates
液壓流體力學.液壓泵和液壓馬達幾何排量-容量流Based on the hydromechanics principle, the hydraulic equipment can push compressive oil into actuators by the pressure and direction control circuits. the piston of actuator translates distributed pressure into centralized force of piston rod
液壓加載根據液壓流體力學原理,利用液壓元件組成的壓力和方向控制迴路,將一定壓力的油液輸入液壓缸,由液壓缸內的活塞把分佈的油壓轉變為集中力,最後經活塞桿輸出。This ultrafilter adopts dissymmetrieal semipermeable film which is made from macromolecule material with special process the raw liquid fiows under pressure , inside or out side the film the mscromolecule substance and colloid particles in the raw liquid are clogged at the film suface and are brought away by circulating raw liquid then the raw liquid becomes inspissated , and further more , the subtance in liquid is seperated
本設備是以高分子材料採用特殊工藝製成的不對稱頭透膜,在壓力作用下,原液在膜內或膜外流動,其中的高分子物質,以及膠體粒子則被阻止在膜面,被縮和提純的目的。This ultrafilter adopts dissymmetrieal semipermeable film which is made from macromolecule material with special process. the raw liquid flows under pressure, inside out side the film suface and are brought away by circulating raw liquid. then the raw liquid becomes inspissated, and further more, the subtance in liquid is seperated
本設備是以高分子材料採用特殊工藝製成的不對稱頭透膜,在壓力作用下,原頁在膜內或膜外流動,其中的高分子物質,以及膠體粒子則被阻止在膜面,被循環流動的原料帶走而成為濃縮液,從而達到了物料的分離濃縮和提純的目的。The pressure at every point along the pipeline, the gas - liquid phase flow rate and the law of the liquid holdup in the pipeline chang ing with time in the process of gas storage and supply at the time of peak shaving are simulatively calculated, and based on this, the problem on peak shaving is thoroughly analyzed by combining with the existing pinghu - shanghai gas pipeline in china
模擬計算了調峰過程中管道儲氣和供氣過程沿線各點的壓力、氣液相流速和管內持液率隨時間的變化規律,據此結合我國已建成現有的平湖一上海的天然氣管線,對調峰問題作了深入地分析。The experimental results show that, with the increase of three parameters the diameters of the droplets will all decrease
試驗結果表明:隨著液體壓力、液體流量及靜電電壓的增加,噴霧霧滴粒徑都變小且分佈都會更均勻。According to the request of this subject, we have developed the system hardware and software for the slave device and the inspection software running on the pc. in this paper all of the followings is illustrated detailedly, such as the research on the principles of measurement and its realization, three means of water - level measurement that are separately based on photo electricity coder, pressure sensor and potentiometer ; selection of the microchip, we choose an advanced integrated soc ( system on chip ) microchip c8051f021 as the main controller ; realization of signal sampling, processing and its conversion in the mcu ; application of high precision 16 bits adc cmos chip - - ad7705 in our system, designing its interface with the microchip and relevant program ; using a trickle charge timekeeping chip ds1302 in the system which can provide time norm and designing of its i / o interface and program ; additionally, a 4 ~ 20ma current output channel to provide system check - up using ad421. in the system, ad421, ad7705 and the microchip compose spi bus ; to communicate with the master pc, here we use two ways which are separately rs232 and rs485 ; moreover, there are alarm unit, keyboard unit, power supply inspection unit and voltage norm providing unit in the system
針對研製任務的要求,課題期間研製了下位機系統硬體和軟體,開發了上位機監控軟體,其中所作的具體工作包括:測量原理的研究和在系統中的實現,在本次設計中用三種方法來進行水位測量,分別是旋轉編碼器法、液位壓力傳感器法和可變電阻器法;主控晶元的選擇,我們選用了高集成度的混合信號系統級晶元c8051f021 ;實現了信號的採集和處理,包括信號的轉換和在單片機內的運算;高集成度16位模數轉換晶元ad7705在系統中的應用,我們完成了它與單片機的介面設計及程序編制任務;精確時鐘晶元ds1302在系統中的應用,在此,我們實現了用單片機的i o口與ds1302的連接和在軟體中對時序的模擬,該晶元的應用給整臺儀器提供了時間基準,方便了儀器的使用;另外,針對研製任務的要求,還給系統加上了一路4 20ma模擬信號電流環的輸出電路來提供系統監測,該部分的實現是通過採用ad421晶元來完成的,本設計中完成了ad421與單片機的spi介面任務,協調了它與ad7705晶元和單片機共同構成的spi總線系統的關系,並完成了程序設計;與上位機的通信介面設計,該部分通過兩種方法實現: rs232通信方式和rs485通信方式;系統設計方面還包括報警電路設計、操作鍵盤設計、電源監控電路設計、電壓基準電路的設計。A convenient model of pressure gradient calculation of gas - liquid slug flow in vertical wellbore
垂直井筒氣液段塞流壓力梯度的簡便演算法Power transformers and reactor fittings - liquid level, pressure devices and flow indicators
電力變壓器和反應堆配件.液位壓力裝置和流量指示計Three alterable experimental parameters were chosen : liquid pressure, flux and electrostatic voltage
試驗選擇了3個可變操作條件:液體壓力、液體流量及靜電電壓情況下。In order to decreasing hydraulic impact, the principle is analyzed to eliminate or increase hydraulic impact by means of changing eccentric lump structure to cut down the inertia force of starting, changing the pressure of pilot electromagnetic relief valve and changing the parameters of accumulator
為了減小液壓沖擊,本文分析了用改變偏心塊結構減小起振慣性力的方式、用改變先導式電磁溢流閥溢流壓力方式和改變蓄能器參數方式消除或減小液壓沖擊的原理。1 point ). how does the pressure change during the blood passage via the blood circulatory system from the ventricle to atrium in fishes
1分) .在魚類中,當血液從心室到心房流動時,血液的壓力是如何變化的分享友人