关键词: 静态混合器 , 数值模拟 , 速度 , 湍动能

Abstract: The velocity distribution of the tube in the kenics static mixer was simulated by using the CFD software．And flow field of partial type static mixer was measured by using LDV （Laser Doppler Velocity）． The discussions were given to the
effect of length －to－diameter ratio of mixing elements on the velocity distribution and turbulent property in kenics static mixer．The results show that the trend of the velocity of different direction and turbulent kinetic energy along axis is changeless with the variety of the length －to－diameter ratio of mixing elements ．But the value of amplitude is influenced．When the length－to－diameter ratio of mixing elements is little，the value of amplitude of velocity of different direction and the slope is bigger．The effect of the radial velocity is obvious and that of axial velocity is minor．With the length－to－diameter ratio of mixing elements diminution，the turbulence degree and turbulent kinetic energy enhanced and the increasing of the velocity is greater than the variation of velocity.

Key words: Static mixer , Numerical simulation , Velocity , Turbulent kinetic energy