流体机械
流體機械
류체궤계
FLUID MACHINERY
2014年
4期
17-22
,共6页
弯道%回流器%优化设计%流道%仿真模拟
彎道%迴流器%優化設計%流道%倣真模擬
만도%회류기%우화설계%류도%방진모의
curved channel%return channel%optimization design%computer simulation
国内目前关于弯道和回流器的研究较少，本文针对这一问题进行了研究。弯道部分文中提出了截面面积的变化率为常数的设计方法，用FLUENT软件对其及已存在的2种方案进行了建模仿真，发现总压恢复系数和出口流场分布与改进方案比传统方案要好，且尺寸比改进方案小，具有可推广性；回流器部分比较了轮毂倾斜和轮盖倾斜2种方案，并用NUMECA软件进行了仿真，从压力分布、流线分布角度分析发现轮盖倾斜的方案较好。在3．11kg/s流量下，轮毂倾斜的效率为85．72％，损失系数为47．5％；轮盖倾斜的效率为87．77％，损失系数为35．91％。
國內目前關于彎道和迴流器的研究較少，本文針對這一問題進行瞭研究。彎道部分文中提齣瞭截麵麵積的變化率為常數的設計方法，用FLUENT軟件對其及已存在的2種方案進行瞭建模倣真，髮現總壓恢複繫數和齣口流場分佈與改進方案比傳統方案要好，且呎吋比改進方案小，具有可推廣性；迴流器部分比較瞭輪轂傾斜和輪蓋傾斜2種方案，併用NUMECA軟件進行瞭倣真，從壓力分佈、流線分佈角度分析髮現輪蓋傾斜的方案較好。在3．11kg/s流量下，輪轂傾斜的效率為85．72％，損失繫數為47．5％；輪蓋傾斜的效率為87．77％，損失繫數為35．91％。
국내목전관우만도화회류기적연구교소，본문침대저일문제진행료연구。만도부분문중제출료절면면적적변화솔위상수적설계방법，용FLUENT연건대기급이존재적2충방안진행료건모방진，발현총압회복계수화출구류장분포여개진방안비전통방안요호，차척촌비개진방안소，구유가추엄성；회류기부분비교료륜곡경사화륜개경사2충방안，병용NUMECA연건진행료방진，종압력분포、류선분포각도분석발현륜개경사적방안교호。재3．11kg/s류량하，륜곡경사적효솔위85．72％，손실계수위47．5％；륜개경사적효솔위87．77％，손실계수위35．91％。
The paper is devoted to the study of curved channel and return channel,which has not attracted too much attention yet.In the design part of curved channel,the method was puted forward that the curved section area keeps a constant change, which along with another two methods is modeled and simulated by using the software of FLUENT.The result shows that the total pressure recovery coefficient and the flow field of the new method and the other method is better than the traditional one.Besides, the size of the new method is smaller than the better one.In the design part of the return channel,it is found that the bub tilting method is better than the shroud tilting method in the pressure distribution,and streamline distribution by using the software of NUMECA.When the mass flow is 3.11kg/s,the efficiency of the bub tilting method is 85.72%,and the loss coefficient is 47.5%;When the mass flow is 3.11kg/s,the efficiency of the shroud tilting method is 87.77%,and the loss coefficient is 35 .9 1%.
