摘要
利用有限元法对带有容腔的管道流动进行了数值计算 ,获得了管道中和容腔中速度场与涡旋随时间变化及发展规律。模拟结果表明 ,带有容腔的管道流动流场在过渡过程中 ,容腔中的涡旋随时间逐渐增大 ;到达稳定状态时 ,容腔中的涡旋尺寸最大 ,并基本保持不变。为了维持容腔中涡旋的运动 ,必然要消耗管道中主流的能量 ,从而造成整个管道中的能量损失。研究结果对于设计和分析带有容腔管道结构具有一定的实际意义。
The finite element method (FEM) is used to c al culate the flow field of the flow in a pipe with square-cavity. The velocity ve ctors and the vortex varying with time and their developing characteristic have been achieved.The results indicate that the flow field in a pipe with a square- cavity is changing with time during transient process. The size of the vortex in the cavity is getting bigger and bigger. When the steady state is reached, the size of the vortex in the cavity is the biggest and is kept unchanging. Since th e vortex in the cavity keeps rotating, energy in the main flow must be consumed, then the energy loss is produced. The study has significance for designing and analyzing the pipe with square-cavity.
出处
《流体机械》
CSCD
北大核心
2005年第3期26-29,63,共5页
Fluid Machinery
关键词
方腔
剪切流动
数值计算
有限元
能量损失
square-cavity
shear flow
numerical simulati on
finite element method
energy loss
