基于CFX的对旋式通风机数值模拟与研究  

Numerical simulation and research on counter-rotating fan based on CFX

作　　者：艾子健[1,2] 秦国良[2] 

机构地区：[1]三明学院机电工程学院,福建三明365004 [2]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《矿山机械》2015年第8期27-30,共4页Mining & Processing Equipment

基　　金：国家重点基础研究发展计划(973计划)(2012CB026004)

摘　　要：介绍了对旋式通风机数值模拟的基本过程及方法,并对对旋式通风机进行了多工况全三维数值模拟及分析。结果表明:对旋式通风机在额定工况附近,叶轮叶栅内静压及速度分布均匀,流动效率高;在小流量工况时,第2级叶轮压升增大,电动机易过载,流动分离增加,叶轮效率及整机效率下降;在大流量工况时,第2级叶轮区静压及速度分布极其不均匀,流动分离扩散至整个叶栅通道,大幅降低了第2级叶轮的压升和效率,使整机性能大幅下降。The basic process and method of numerical simulation on the counter-rotating fan was introduced,and 3D numerical simulation and research on a counter-rotating fan in various operation modes were conducted.The results showed： near rated-flow operation mode, the static pressure and the velocity in the cascade passageof the impellor were distributed uniformly and the flow efficiency was high; in small-flow operation mode, thepressure rise of the second stage ofimpellor increased, which led to overload of the motor, enhancement of flowseparation, decrease of impellor efficiency and fan efficiency; in large-flow operation mode, the static pressureand the velocity of the second stage of impellor were distributed extremely unevenly, the flow separation spreadto the whole cascade passage, thus the pressure rise and the efficiency of the second stage of impellor greatlyreduced, and the performance of the fan remarkably reduced also.

关 键 词：对旋式通风机 数值模拟 电动机过载 CFX 

分 类 号：TH43[机械工程—机械制造及自动化]