增加短叶片的9-26型风机流场数值模拟  

Air Flow Simulation in High-pressure Fan with Splitter Blade

作　　者：李建锋[1] 吕俊复[2] 张海[2] 刘青[2] 岳光溪[2] 

机构地区：[1]中国电力企业联合会科技服务中心,北京100038 [2]清华大学,北京100084

出　　处：《流体机械》2007年第10期29-32,共4页Fluid Machinery

基　　金：国家重点基础研究发展规划项目(20026309)

摘　　要：风机的设计过程中,可以采用在长叶片中间安装短叶片的方法来提高风机性能。为了深入了解增加短叶片后的风机流场,应用计算流体力学软件Fluent对某9-26型高压离心风机进行了加装短叶片后的数值模拟并对结果进行分析。计算结果显示,在相同的进出口条件下,增加短叶片的风机流量可增加约5%,出口全压平均增加约10%,叶片的长短对流量的增加也有所影响。计算中所采用的是标准k-ε湍流模型与非结构化网格。模拟结果可以有效帮助人们改进风机性能。In the process of fan＇ s design, splitter blades could be adopted in the middle of rotator to improve the performance of fan. In order to understand the flow pattern in the high-pressure centrifugal blower of 9-26type with splitter blade thoroughly, computational fluid dynamics Fluent is applied and the three dimensional air flows in the fan is numerically simulated and analyzed. The calculating results showed that under the same condition, the flux of the fan was improved 5% approximately and the mean total pressure at outlet of the fan was improved 10% because of the splitter blade, the length of the splitter blade affected the flux either. Standard k-ε turbulent model and unstructured grids are applied in computation. The results of calculation can good helpful for people to improve the performance of the fan.

关 键 词：离心风机 数值模拟 计算流体力学 长短叶片 流场 

分 类 号：TH432[机械工程—机械制造及自动化]