交通运输工程学报
交通運輸工程學報
교통운수공정학보
JOURNAL OF TRIFFIC AND TRANSPORTATION ENGINEERING
2015年
2期
42-49
,共8页
船舶工程%喷水推进轴流泵%计算流体动力学%三元水力设计方法%环量%叶片数%空化
船舶工程%噴水推進軸流泵%計算流體動力學%三元水力設計方法%環量%葉片數%空化
선박공정%분수추진축류빙%계산류체동역학%삼원수력설계방법%배량%협편수%공화
marine engineering%axial waterj et pump%computational fluid dynamics%three-dimensional hydraulic design method%circulation%blade number%cavitation
基于环量的三元设计方法和计算流体动力学，研究了叶片数、叶片流向环量中心位置与叶片出口边环量对叶轮性能的影响，分析了导叶进口边和出口边环量对喷水推进轴流泵性能的影响，通过合理地控制这些因素，设计了一种效率高、空化性能好的喷水推进轴流泵。在流量为56．2 m3·s－1时，泵的扬程为35．9 m，功率为21465 kW，效率为92．3％，可见，设计泵的性能优良，效率高。研究结果表明：增加叶片数能够有效减小单叶片转矩，当叶片数从5个增加到7个时，单叶片转矩减小了21％；叶片环量中心靠近出口边，有利于提高叶轮的空化性能，当环量中心从叶片弦长的0．3处移动到0．7处时，叶轮吸力面空化面积减小80％；叶轮出口边环量斜率会影响叶轮效率，当斜率分别为0．8、1．0和1．2时，叶轮效率逐步提高；当出口边环量从0．40增加到0．50时，叶轮的扬程和功率近似线性增加，扬程增加19．9％，功率增加19．5％；随着导叶进口边环量与出口边环量的比值的增大，泵效率先增大后减小，当比值为0．93时，泵的效率最高；导叶出口边环量分布会影响泵的效率、出口不均匀度和出口周向动能，当导叶出口边环量为－0．05时，泵的效率最高，出口不均匀度和出口周向动能最小。
基于環量的三元設計方法和計算流體動力學，研究瞭葉片數、葉片流嚮環量中心位置與葉片齣口邊環量對葉輪性能的影響，分析瞭導葉進口邊和齣口邊環量對噴水推進軸流泵性能的影響，通過閤理地控製這些因素，設計瞭一種效率高、空化性能好的噴水推進軸流泵。在流量為56．2 m3·s－1時，泵的颺程為35．9 m，功率為21465 kW，效率為92．3％，可見，設計泵的性能優良，效率高。研究結果錶明：增加葉片數能夠有效減小單葉片轉矩，噹葉片數從5箇增加到7箇時，單葉片轉矩減小瞭21％；葉片環量中心靠近齣口邊，有利于提高葉輪的空化性能，噹環量中心從葉片絃長的0．3處移動到0．7處時，葉輪吸力麵空化麵積減小80％；葉輪齣口邊環量斜率會影響葉輪效率，噹斜率分彆為0．8、1．0和1．2時，葉輪效率逐步提高；噹齣口邊環量從0．40增加到0．50時，葉輪的颺程和功率近似線性增加，颺程增加19．9％，功率增加19．5％；隨著導葉進口邊環量與齣口邊環量的比值的增大，泵效率先增大後減小，噹比值為0．93時，泵的效率最高；導葉齣口邊環量分佈會影響泵的效率、齣口不均勻度和齣口週嚮動能，噹導葉齣口邊環量為－0．05時，泵的效率最高，齣口不均勻度和齣口週嚮動能最小。
기우배량적삼원설계방법화계산류체동역학，연구료협편수、협편류향배량중심위치여협편출구변배량대협륜성능적영향，분석료도협진구변화출구변배량대분수추진축류빙성능적영향，통과합리지공제저사인소，설계료일충효솔고、공화성능호적분수추진축류빙。재류량위56．2 m3·s－1시，빙적양정위35．9 m，공솔위21465 kW，효솔위92．3％，가견，설계빙적성능우량，효솔고。연구결과표명：증가협편수능구유효감소단협편전구，당협편수종5개증가도7개시，단협편전구감소료21％；협편배량중심고근출구변，유리우제고협륜적공화성능，당배량중심종협편현장적0．3처이동도0．7처시，협륜흡력면공화면적감소80％；협륜출구변배량사솔회영향협륜효솔，당사솔분별위0．8、1．0화1．2시，협륜효솔축보제고；당출구변배량종0．40증가도0．50시，협륜적양정화공솔근사선성증가，양정증가19．9％，공솔증가19．5％；수착도협진구변배량여출구변배량적비치적증대，빙효솔선증대후감소，당비치위0．93시，빙적효솔최고；도협출구변배량분포회영향빙적효솔、출구불균균도화출구주향동능，당도협출구변배량위－0．05시，빙적효솔최고，출구불균균도화출구주향동능최소。
By using three-dimensional design method based on circulation and computational fluid dynamics,the effects of blade number,blade circulation center position and blade trailing edge circulation on rotor performances were studied,the influences of leading edge circulation and trailing edge circulation of stator on axial waterjet pump performances were analyzed,and an axial waterj et pump with high efficiency and good cavitation capacity was designed by controlling the factors properly.When the flow is 56. 2 m3 ·s-1 ,the head,power and efficiency of the pump are 35. 9 m,21 465 kW and 92. 3%,respectively,so the properties and efficiency of the pump are high.Analysis result shows that increasing blade number is effective to decrease single blade torque,when blade number increases from 5 to 7,single blade torque decreases by 21%. Circulation center moving closer to trailing edge is beneficial to better cavitation performance of rotor,when circulation center moves from 3/10 to 7/10 of blade string length,cavitation area on rotor suction side decreases by 80%.The slope of rotor trailing edge circulation affects rotor efficiency,when the slope changes from 0. 8 to 1. 2 ,rotor efficiency increases gradually.Rotor head and rotor power almost increase linearly when trailing edge circulation ranges from 0. 4 to 0. 5 ,rotor head increases by 1 9. 9%,and rotor power increases by 1 9. 5%.Pump efficiency firstly increases and then decreases with the ratio increase of stator leading edge circulation to rotor trailing edge circulation,and the efficiency is highest when the ratio is 0. 93.Stator trailing edge circulation has effects on pump efficiency,outlet non-uniformity and outlet circumfluent energy,when stator trailing edge circulation is -0. 05 ,pump efficiency is highest,and outlet non-uniformity and outlet circumfluent energy are least.4 tabs,16 figs,20 refs.
