润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2015年
7期
106-109
,共4页
稠密离散相模型%输送管道%冲蚀磨损%流体动力学
稠密離散相模型%輸送管道%遲蝕磨損%流體動力學
주밀리산상모형%수송관도%충식마손%류체동역학
dense discrete phase model%pipeline%erosive wear%fluid dynamics
为研究高体积分数固-液两相流对输送管道的冲蚀磨损程度,采用计算流体力学( CFD)和固液两相流理论,建立冲蚀磨损及流场模型,采用欧拉模型中的稠密离散相模型( DDPM),利用Ansys中的流体动力学模块,对输送管道中的颗粒流场特性和颗粒对管道的冲蚀磨损进行分析。结果表明,入口速度较低时冲蚀主要集中在水平管靠近出口附近,随着入口速度的增加,冲蚀区域逐渐移到弯管附近,且管道的最大冲蚀量有降低的趋势;冲蚀率的大小既与冲蚀速度有关,也与颗粒体积分数有关,当两者符合一定关系时,冲蚀率达到最大。
為研究高體積分數固-液兩相流對輸送管道的遲蝕磨損程度,採用計算流體力學( CFD)和固液兩相流理論,建立遲蝕磨損及流場模型,採用歐拉模型中的稠密離散相模型( DDPM),利用Ansys中的流體動力學模塊,對輸送管道中的顆粒流場特性和顆粒對管道的遲蝕磨損進行分析。結果錶明,入口速度較低時遲蝕主要集中在水平管靠近齣口附近,隨著入口速度的增加,遲蝕區域逐漸移到彎管附近,且管道的最大遲蝕量有降低的趨勢;遲蝕率的大小既與遲蝕速度有關,也與顆粒體積分數有關,噹兩者符閤一定關繫時,遲蝕率達到最大。
위연구고체적분수고-액량상류대수송관도적충식마손정도,채용계산류체역학( CFD)화고액량상류이론,건립충식마손급류장모형,채용구랍모형중적주밀리산상모형( DDPM),이용Ansys중적류체동역학모괴,대수송관도중적과립류장특성화과립대관도적충식마손진행분석。결과표명,입구속도교저시충식주요집중재수평관고근출구부근,수착입구속도적증가,충식구역축점이도만관부근,차관도적최대충식량유강저적추세;충식솔적대소기여충식속도유관,야여과립체적분수유관,당량자부합일정관계시,충식솔체도최대。
In order to study erosive wear extent of solid?liquid two?phase flow with high volume fraction on transportation pipeline,computational fluid dynamics( CFD) and two?phase flow theory were used to establish the erosion wear and fluid flow field model.The dense discrete phase model( DDPM) in Euler model and the fluid dynamics module in Ansys were used to analyze the particle fluid flow feature and erosion wear on pipeline.The results indicate that the erosion is mainly occurred on horizon pipe near the outlet under low inlet velocity.Along with increasing of inlet velocity,the erosive area is gradually moved near to the elbow pipe,and the maximum erosion of pipeline is tended to reduce.Both erosive velocity and particle volume fraction are related to erosion rate,and the erosion rate will reach the maximum value when certain relation?ship is met between them.