摘要
罗茨鼓风机是一种常见的气体输送机械,内部气体流场情况复杂,但是过大的噪声影响了其使用。为了降低罗茨鼓风机运行时的风噪,利用流体动力学仿真软件,建立了罗茨鼓风机数学模型,对罗茨鼓风机内部流场进行数值仿真,得到鼓风机不同渐扩缝隙开启角度时进出口质量流量变化曲线和内部流场的速度曲线。仿真结果表明,渐扩缝隙开启角度50°时有最大的进出口流量,并且鼓风机内部流场速度变化最小,有利于降噪。
Roots blower is a common gas conveying machinery,and the internal gas flow field is complex,but the excessive noise affects its use.In order to reduce the back-flow impact and noise of roots blower,this paper studied gradually expanding gap open angle effect on internal flow field in roots blower.The model of roots blower was established.The internal flow field in roots blower with different gradually expanding gap open angle was simulated using fluid simulation software Fluent.The mass flow curve and velocity field,a are obtained of roots blower.The simulation results show the maximum inlet and outlet mass flow at50°gradually expanding gap opening angle.The flow velocity fluctuation of the blower is the smallest,and good for noise reduction.
作者
郑淑丽
ZHENG Shuli(Changsha Vocational and Technical College, Changsha 410217, China)
出处
《机械》
2017年第11期15-18,22,共5页
Machinery
基金
国家自然科学基金(11402036)
湖南省教育厅项目(14C0026)
工程车辆轻量化与可靠性技术湖南省高校重点实验室开放基金(2013KFJJ05)
长沙职业技术学院课题(CSZY16C07)
关键词
罗茨鼓风机
渐扩缝隙
流体仿真
噪声
roots blower
gradually expanding gap
fluent simulation
noise
