摘要
为提高浴室用集成吊顶暖风机的加热取暖效率,以某品牌的浴室电加热器具中的吹风工况为例,研究其内部的多翼离心叶轮叶片结构及其设计方法.借助大型商业流体仿真软件CFX对风机内部的流场进行数值模拟和计算,并基于CFD仿真模拟的结果,分析原叶轮在空气动力学设计上存在的不足和缺陷.结合原有叶轮叶型的设计方法,创新性地提出并设计了一种由对数螺旋线和小圆弧拟合而成的复合型线的加速叶道离心叶轮,经过3D打印手板进行气动性能对比实测分析,得出了复合型线叶轮相比于原叶轮,吹风出口处的风量为216.2 m^(3)/h,提升了13.9%,且出口处风速更加均匀稳定,此外风机噪声下降了2.3 dB,显著地提高了暖风机的气动性能和取暖效率.文中的数值模拟和试验研究工作对多翼离心暖风机的性能优化和降噪设计具有理论意义和重要的工程应用价值.
In order to improve the heating efficiency of integrated ceiling heaters used in bathrooms,a multi blade centrifugal impeller blade structure and its design method were studied using a certain brand of bathroom electric heating equipment as an example under the blowing condition.Using CFX commercial fluid simulation software,and based on the results of CFD simulation,the shortcomings and defects of the original impeller in aerodynamic design were analyzed.Based on the design method of the original impeller blade profile,the acceleration of the complex line of wind channel impeller formed by fiting logarithmic spiral lines and small arcs was proposed and designed.After comparing and analyzing the aerodynamic performance of the compound profile impeller with the original impeller through 3D printing,it is concluded that the air flow rate at the blower outlet is 216.2 m^(3)/h,which increases by 13.9%,and the airflow speed at the outlet is more uniform and stable.In addition,the noise of the fan has decreased by 2.3 dB,which significantly improves the aerodynamic performance and heating efficiency of the heater.The numerical simulation and experimental study has theoretical significance and important engineering application value for the performance optimization and noise reduction design of multi-wing centrifugal heaters.
作者
高宗飞
朱云明
沈春根
刘江
郭二廓
GAO Zongfei;ZHU Yunming;SHEN Chungen;LIU Jiang;GUO Erkuo(School of Mechanical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《排灌机械工程学报》
CSCD
北大核心
2023年第7期701-708,共8页
Journal of Drainage and Irrigation Machinery Engineering
基金
江苏省自然科学基金面上资助项目(BK20221234)。
关键词
暖风机
多翼离心叶轮
对数螺旋线
复合型线
加速叶道
heating fan
multi-wing centrifugal impeller
logarithmic spiral
compound line
accelerate the leaf
