多旋静态混合器强化对流传质场协同分析

Analysis of the field synergy for convective mass transfer enhanced by multi twist-leaves in static mixers

为了研究静态混合器强化高粘流体混沌对流传质机理,通过积分中值角定量评价雷诺数和混合构件结构对静态混合器内速度场与压力场协同程度的影响。研究结果表明：静态混合器内速度场与压力场的协同角随着雷诺数的增加而降低;当Re〉17.8时,随着截面内叶片个数的增加,多旋静态混合器的协同角逐渐增大;FKSM构件较KSM提高速度场与压力场的协同程度达5.9%~11.9%,且其概率密度分布更加集中,最大概率对应的协同角数值比KSM高2.3%~3.5%,旋流叶片的切割分流作用致使轴向相邻2组混合元件过渡处协同角数值较大。

In order to investigate the convective and chaotic mass transfer mechanism of high-viscosity fluid, the integral mean values of synergy angles were adopted to quantitatively evaluate the effects of Reynolds number and element structures on the synergy of velocity and pressure fields inside the static mixer. The results indicated that the synergy angle of velocity and pressure fields inside the static mixer decreases with increasing Re. The synergy angles of helical static mixers increase with the number of blades increasing for Re〉 17.8. FKSM can improve the synergy of velocity and pressure fields by 5.9%- 11.9% and the probability density distributions of synergy angles are much narrower. The synergy angles of FKSM corresponding to KSM. The cutting and division effects of swirl vanes make the synergy angle at the transition part of two sets of adjacent axial mixing elements larger.