毛管灌水 的英文怎麼說
中文拼音 [máoguǎnguànshuǐ]
毛管灌水
英文
capillary watering-
( 5 ) it was more precise for using darcy - weisbach formula to calculate the hydraulic pressure slope curve in the lateral line, but too complexity. although i - pm wu formula is simple, the estimated results were not agreement with the measured data. a coefficient including irrigation uniformity was presented to modify i - pal wu formula, and the results were agreement after using the coefficient
（ 4 ）利用達西?韋斯巴赫公式計算微孔毛管的沿程水頭損失具有較高的精度，但計算復雜，吳義伯公式計算雖較簡單，但在灌水均勻度較差時誤差較大，為此對吳義伯公式進行了修正，提出了修正系數的計算經驗公式，取得了良好的結果，為簡易地下滴灌工程設計中水力計算建立了簡化公式。Many factors have effect on irrigation uniformity. with the growing of pressure, how is irrigation uniformity of trickle irrigation varying on different condition of the diameter of drip line, the distance of emitters, the length of drip line, the style of emitters, the flux ratio of emitters and the face gradient of little irrigation district. the consequence shows that pressure has puny effect on irrigation uniformity
滴灌系統的灌水均勻度受眾多因素的影響，本文通過毛管的管徑、滴頭間距、毛管的管長、灌水器的類型和灌水器的流量系數不同的情況下，灌水均勻度隨壓力水頭變化模擬結果顯示，壓力水頭對灌水均勻度影響非常小。On the contrary, the length of drip line, the diameter of drip line, the distance of emitters and the face gradient of little irrigation district have remarkable effect on irrigation uniformity
在田間工程中，毛管長度、毛管的管徑、滴頭間距和地形坡度對灌水均勻度影響非常顯著。( 4 ) through the hydraulic property experiment of micro - hole lateral pipes of simple sdi in air, it was found that the average pressure of 60 mitre length lateral pipes was at the position of per 40o / o ~ ~ ~ 50 % of the effectual pipe length from the fist micro - hole, major pressure - loss was occurred at the ahead part of half pipe. the pressure uniformity reduced with orifice aperture ? increasing, and the relationship between pressure uniformity and initial water pressure was poor. running under the initial water pressure of 1. 5 meter, the discharge uniformity reduced with orifice aperture ? increasing, and when the orifice aperture smaller than or equal 1. 0mm, irrigation uniformity could achieve above 0. 6
（ 3 ）通過對空氣介質中簡易地下滴灌的微孔毛管試驗研究發現： 60m管長的毛管平均壓力水頭的位置基本上在距第一孔口的有效管長40 - 45的地方；大部分水頭損失發生在毛管的前半部分；壓力均勻度隨孔徑的增大而減小，但與初始工作水頭關系不密切；在1 . 5m以下的工作壓力下運行，沿程出流均勻度隨孔徑的增大而降低，當孔徑不大於1 . 0mm時，灌水均勻度可以達到60以上；當孔徑大於等於1 . 2mm時，灌水均勻度低於50 。In a short, answer to the optimizing length of porous pipe is very important in optimum design of trickle system
毛管和支管的直徑以及設計壓力水頭一定的情況下，大於或小於毛管的經濟長度，都會使滴灌系統的費用增加。On the other hand for four main vegetation typies, which are picea crassifolia, forests sabina przewalskii forests, bushes and pastureland, whose soil permeability function was analyzed from angle of its physics, capacity of water, storing water in it. the results show as follow : permeability function of soil is controlled by quality of soil hole. the quality and quantity of soil hole under picea crassifolia forests are the best, and the permeability also is the best
另外，從土壤物理性質、蓄水量、貯水量等角度對祁連山苔蘚雲杉林、祁連圓柏林、亞高山灌叢林、牧坡草地4種主要植被類型的土壤滲透功能進行分析，結果表明：土壤的滲透功能主要由土壤非毛管孔隙度的質和量決定的，苔蘚雲杉林土壤非毛管孔隙度的質和量最好，它的滲透也最好；雖然亞高山灌叢林的滲透功能次之，但由於它所處的位置和面積大，現實貯水量在祁連山四種主要植被類型中最大。With the in - built drip irrigation belt and thin wall chip irrigation belt taken as examples, the flow rate distribution and hydraulic losses of drippers along capillary tubes at different inlet pressures were measured under the conditions of horizontal slope and slope gradients of 0. 5 % and 1 %, then the uniformity of capillary tubes was calculated at different slope gradients and pressures in consideration of the manufacture deviation of drippers
摘要以內鑲式滴灌帶和薄壁滴灌帶為研究對象，測定了平坡、 0 . 5 %坡度和1 %坡度時，不同入口壓力下滴頭沿毛管的流量分佈和水力損失，並結合滴頭的製造偏差，計算得出不同坡度和壓力條件下滴灌毛管的均勻度。( 3 ) based on the experiments data, it has been found that if the emitter discharge of sdi was little, the depth of pipe buried should be shallow, and the distance between two micro holes should be chosen to equal or close the distance between two lateral pipes, if the emitter discharge of sdi was great, the pipe may be buried deeper, and the distance between two micro holes could be greater than the distance between two lateral pipes
根據一維土柱近似的濕潤輪廓線初步選定了工程設計參數。在地下滴灌灌水器出流量較小情況下，埋深應淺，孔距應選擇和毛管間距相等或接近；出流量大時，埋深可深，孔距大於毛管間距仍可獲得較均勻的土壤水分分佈。Abstract : problems caused in designing and management including configuring regulating devices, deciding spaces of the last pipelines, and working - out irrigation scheme in reason using drip irrigation in green houses and in covered lands are raising in recent years, theose not only affect benefits but also result in failing of projects
文摘:近幾年來溫室、大棚種植蔬菜採用滴灌技術的越來越多，但有些工程無論設計上、管理上都存在一些問題，包括調壓設備的合理配置，按土壤、作物、灌水器及滴灌總水量合理確定毛管（或滴灌帶）的間距，以及按大棚蔬菜的耗水特性合理確定灌溉制度等，上述各項確定的不合理，不但直接影響效益，嚴重時可導致工程失敗，值得重視。Study on genetic algorithms of hydraulic analysis and optimum design for micro - irrigation laterals
微灌毛管水力解析及優化設計的遺傳演算法研究Experimental research on capillary irrigation uniformity of micro - irrigation gravitational flexible hose
微灌自壓軟管毛管灌水均勻度的試驗研究Goal function is to minimize the expense of trickle system ; the difference in pressure of drip line is thought as restriction condition ; we may obtain optimizing len gth of drip line by answering to the goal function
本文在灌水小區面積一定的情況下，以田間管網的造價與運行費用最小為目標函數，以毛管的壓力差為約束條件，求得田間灌水小區內毛管的經濟長度。分享友人