离心风机蜗壳出口结构优化研究  

Study on Optimization of Outlet Structure of Centrifugal Fan Volute

作　　者：张磊[1] 黄康[1] 黄国兴[1] 程彪 Zhang Lei;Huang Kang;Huang Guoxing;Cheng Biao(HeFei University of Technology,Hefei 230009,China;Susong Public Resource Trading Center,Anqing 246500,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009 [2]宿松县公共资源交易中心,安徽安庆246500

出　　处：《流体机械》2019年第6期47-51,共5页Fluid Machinery

摘　　要：为提高空气净化器中离心风机的风量,提出了一种基于Kriging近似模型和遗传算法的优化方法,采用正交试验的设计方法对蜗壳的出口扩张角θ、蜗舌半径r、蜗舌间隙t进行25组方案设计,并采用ANSYSFLUENT对25组蜗壳方案进行定常数值模拟,选取风机系统的风量作为优化设计目标,建立了风量与蜗壳的3个参数之间的Kriging近似模型,并用遗传算法对近似模型进行寻优,得到最优的蜗壳参数。通过对优化后的蜗壳进行仿真实验,风量提高了19.683%,同时对比优化前后的风机内部速度、总压等参数的分布,优化后的蜗壳内部速度分布更加合理,在蜗舌处的流动损失较小。提出的蜗壳优化方法对提高离心通风机性能提供了有效参考。To increase the flow rate of the centrifugal fan used in the air purifier,an optimization process was proposed based on Kriging model and genetic algorithm.25 sets of schemes containing the outlet angle of the voluteθ,radius of tongue r and the cutoff clearance t were designed using the orthogonal experiment methods.The steady numerical simulation of the 25 sets of volute schemes was carried out using ANSYS FLUENT software.The flow rate of the fan system was selected as the optimization design objective.The Kriging approximation models between the flow rate and the three parameters of the volute were built.And,the genetic algorithm was used to optimize the approximation models to obtain the optimum parameters of the volute.By simulation tests on the optimized volute,the flow rate of the fan was increased by 19.683%.Meanwhile,by comparing the distribution of such parameters as internal speed,total pressure,of the fan before and after optimization,the velocity distribution inside the optimized volute was more reasonable and the flow loss was relatively small at the tongue.The optimization method of volute proposed can provide an effective reference for the improvement of centrifugal fan performance.

关 键 词：离心通风机 蜗壳 正交试验设计 Kriging近似模型 遗传算法 风量 

分 类 号：TH43[机械工程—机械制造及自动化] TB47[一般工业技术—工业设计]