多级低速离心鼓风机无叶扩压器数值模拟分析
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摘要
采用SolidWorks建模软件和CFX流场模拟软件对多级低速离心鼓风机无叶扩压器进行数值模拟,分析研究叶轮出口气流角、流量因数和自身尺寸对无叶扩压器的影响。研究结果表明:无叶扩压器效率随气流角的增大而提高,随自身尺寸的增大而降低,随流量因数的增大而提高;静压升因子随气流角的增大而减小,随扩压器尺寸的增大而增大,随流量因数的增大而增大。通过研究得出使无叶扩压器达到最优效率的设计原则:叶轮出口气流角度为20～25°,流量因数尽可能大,扩压器自身尺寸也尽可能大。
The SolidWorks modeling software and CFX flowfield simulation software were used to simulate the vaneless diffuser of multistage low speed centrifugal blower. The influence of the impeller outlet airflow angle, flow factor and its own size on the vaneless diffuser was analyzed. The results show that the efficiency of the vaneless diffuser increases with the increase of the airflow angle, decreases with the increase of its own size, and increases with the increase of the flow factor. The static pressure rise factor decreases with the increase of the airflow angle, increases with the increase of the size of the diffuser, and increases with the increase of the flow factor. Through the research, the design principle of achieving the optimal efficiency of the vaneless diffuser is obtained: the impeller outlet airflow angle is 20-25°, the flow factor is as large as possible, and the diffuser size is as large as possible.
The SolidWorks modeling software and CFX flowfield simulation software were used to simulate the vaneless diffuser of multistage low speed centrifugal blower. The influence of the impeller outlet airflow angle, flow factor and its own size on the vaneless diffuser was analyzed. The results show that the efficiency of the vaneless diffuser increases with the increase of the airflow angle, decreases with the increase of its own size, and increases with the increase of the flow factor. The static pressure rise factor decreases with the increase of the airflow angle, increases with the increase of the size of the diffuser, and increases with the increase of the flow factor. Through the research, the design principle of achieving the optimal efficiency of the vaneless diffuser is obtained: the impeller outlet airflow angle is 20-25°, the flow factor is as large as possible, and the diffuser size is as large as possible.
引文
[1]高丽敏,刘波,王欢.无叶扩压器对离心压缩机流场及性能影响的数值研究[J].中国机械工程,2008,19(17):2098-2102.
[2]刘海清,张宏武,高闯.某带无叶扩压器的离心压缩机内部流动特性与稳定性分析[J].风机技术,2013(4):17-22.
[3]高闯,谷传纲,王彤,等.无叶扩压器内的射流-尾迹型扰动分析[J].动力工程,2009,29(4):326-329,341.
[4]沈枫,竺晓程,杜朝辉,等.离心压缩机无叶扩压器的三维失速模型[J].上海交通大学学报,2011,45(9):1251-1255.
[5]沈枫,竺晓程,刘鹏寅,等.无叶扩压器失速的三维可压缩流模型[J].上海交通大学学报,2011,45(11):1725-1730.
[6]马超,王航,刘云岗,等.小流量下离心压气机无叶扩压器数值模拟及流动分析[J].内燃机与动力装置,2010(5):13-16,25.
[7]张磊,李康,王松岭.离心压气机无叶扩压器内部流动三维数值研究[J].热力发电,2017,46(9):92-98,103.
[8]程超,秦国良,张家忠,等.扩压器对基本级性能的影响[J].航天动力学报,2017,32(1):248-256.
[9]王松岭,孔禹,张磊.无叶扩压器半径比对内部流动影响的研究[J].电力科学与工程,2017,33(10):45-49.
[10]丁杰,胡晨星,刘鹏寅,等.无叶扩压器中非定常流动的DMD模态分析[J].动力工程学报,2017,37(6):447-453.
[11]马超.车用涡轮增压器离心压气机无叶扩压器的数值研究及特性曲线形成机理分析[D].济南:山东大学,2011.
[12]西安交通大学透平压缩机教研室.离心式压缩机原理[M].北京:机械工业出版社,1990.
[13]胡世军,张恒磊.大型风力机叶片气动外形设计及三维实体建模研究[J].机械制造,2016,54(1):16-18.
[2]刘海清,张宏武,高闯.某带无叶扩压器的离心压缩机内部流动特性与稳定性分析[J].风机技术,2013(4):17-22.
[3]高闯,谷传纲,王彤,等.无叶扩压器内的射流-尾迹型扰动分析[J].动力工程,2009,29(4):326-329,341.
[4]沈枫,竺晓程,杜朝辉,等.离心压缩机无叶扩压器的三维失速模型[J].上海交通大学学报,2011,45(9):1251-1255.
[5]沈枫,竺晓程,刘鹏寅,等.无叶扩压器失速的三维可压缩流模型[J].上海交通大学学报,2011,45(11):1725-1730.
[6]马超,王航,刘云岗,等.小流量下离心压气机无叶扩压器数值模拟及流动分析[J].内燃机与动力装置,2010(5):13-16,25.
[7]张磊,李康,王松岭.离心压气机无叶扩压器内部流动三维数值研究[J].热力发电,2017,46(9):92-98,103.
[8]程超,秦国良,张家忠,等.扩压器对基本级性能的影响[J].航天动力学报,2017,32(1):248-256.
[9]王松岭,孔禹,张磊.无叶扩压器半径比对内部流动影响的研究[J].电力科学与工程,2017,33(10):45-49.
[10]丁杰,胡晨星,刘鹏寅,等.无叶扩压器中非定常流动的DMD模态分析[J].动力工程学报,2017,37(6):447-453.
[11]马超.车用涡轮增压器离心压气机无叶扩压器的数值研究及特性曲线形成机理分析[D].济南:山东大学,2011.
[12]西安交通大学透平压缩机教研室.离心式压缩机原理[M].北京:机械工业出版社,1990.
[13]胡世军,张恒磊.大型风力机叶片气动外形设计及三维实体建模研究[J].机械制造,2016,54(1):16-18.