摘要
通过建立数学模型,对大宽高比矩形通道单相低频脉动层流流动特性进行了分析。研究结果表明:低频率流量脉动未引起流体的速度分布变化,压降与流量间存在相位差,相位差仅与通道窄边尺寸、流体粘性及脉动周期相关。脉动周期及流体粘性越大,相位差越小;窄边尺寸越大,相位差越大。通过建立模型对上述现象进行了分析。
The phase lags in pulsating single-phase laminar flow of rectangular channels with big aspect ratio were studied. The results show that the low frequency flow rate pulsation does not arouse the distortion of velocity profile. There is a phase lag between the pressure drop and flow rate, and the phase lag is related to the narrow edge length of the channel, fluid viscosity and the pulsating period. The bigger the pulsating period
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2013年第2期218-222,共5页
Atomic Energy Science and Technology
基金
中央高校基本科研业务费专项资金资助项目(HEUCFZ1008)
关键词
矩形通道
脉动层流
相位差
低频率
rectangular channel
pulsating laminar flow
phase lag
low frequency
