流体机械
流體機械
류체궤계
Fluid Machinery
2015年
8期
16-20
,共5页
徐文汗%李剑峰%王光存%刘子武%姚帅帅
徐文汗%李劍峰%王光存%劉子武%姚帥帥
서문한%리검봉%왕광존%류자무%요수수
离心式压缩机%固体颗粒%离散相模型%运行轨迹%叶片磨损
離心式壓縮機%固體顆粒%離散相模型%運行軌跡%葉片磨損
리심식압축궤%고체과립%리산상모형%운행궤적%협편마손
centrifugal compressor%solid particle%discrete phase model%motion trajectory%blade erosion
针对离心压缩机叶轮的冲蚀磨损问题,利用FLUENT中离散相模型、质量冲蚀率模型,对压缩机内部不同粒径的固体颗粒的运行轨迹、运动速度、偏聚浓度及造成的叶片冲蚀率的分布进行了数值模拟. 结果表明:粒径为5~20μm的绝大部分的固体颗粒流经大叶片压力面附近流道;固体颗粒在运动到叶片前缘过程中速度迅速升高,在压力面腹侧会有所减小,后缘处重新升高;大叶片后缘根部固体颗粒浓度高、运行速度快,冲蚀磨损严重,且固体颗粒直径越大对大叶片压力面造成的冲蚀磨损越严重.
針對離心壓縮機葉輪的遲蝕磨損問題,利用FLUENT中離散相模型、質量遲蝕率模型,對壓縮機內部不同粒徑的固體顆粒的運行軌跡、運動速度、偏聚濃度及造成的葉片遲蝕率的分佈進行瞭數值模擬. 結果錶明:粒徑為5~20μm的絕大部分的固體顆粒流經大葉片壓力麵附近流道;固體顆粒在運動到葉片前緣過程中速度迅速升高,在壓力麵腹側會有所減小,後緣處重新升高;大葉片後緣根部固體顆粒濃度高、運行速度快,遲蝕磨損嚴重,且固體顆粒直徑越大對大葉片壓力麵造成的遲蝕磨損越嚴重.
침대리심압축궤협륜적충식마손문제,이용FLUENT중리산상모형、질량충식솔모형,대압축궤내부불동립경적고체과립적운행궤적、운동속도、편취농도급조성적협편충식솔적분포진행료수치모의. 결과표명:립경위5~20μm적절대부분적고체과립류경대협편압력면부근류도;고체과립재운동도협편전연과정중속도신속승고,재압력면복측회유소감소,후연처중신승고;대협편후연근부고체과립농도고、운행속도쾌,충식마손엄중,차고체과립직경월대대대협편압력면조성적충식마손월엄중.
To study the solid particle erosion of the blades in the centrifugal compressor,based on discrete phase model,Finnie ductile materials erosion model of FLUENT software,the motion trajectory,motion speed and mass concentration of solid particles and the erosion rate of the blades were simulated successfully.According to the simulation results,when the diameter ranges from 5μm to 20μm,most of the solid particles flow through the flow channel near the pressure surface of the large blade.Before arriving at the front edge,the particle speed increases quickly,but during the process of running to the rear edge of the blade,the speed first reduces and then increases.At the rear edge of the large blade where concentration and speed of solid particles are high,the maximum erosion rate appears.And particles with larger diameter cause more serious erosion wear to the pressure surface.
