轻质分散相双锥旋流器的压降模型

为了研究各种参数对压降的影响,本文在对旋流器内流场进行分析的基础上建立了计算旋流器压降的分析模型,用来计算旋流器锥段的压降．分析表明：按本文计算的压降代表了旋流器内分离区将流体动能与静压能相互转换所需要的“有效”压降,而旋流器进口处的压降则表示实现流体流道的大小与改变所需要克服的压力损失,“有效”压降所占的比例越大,则表示旋流器的能耗越能有效地用于旋流器内两相液体的分离．通过计算数据与实测压降数据的对比发现,对于一定的旋流器管子以及一定的物料性质来说,锥段压降所占旋流器总压降的比例大体上保持不变,但当旋流器结构尺寸以及流体的物性发生变化时,这种比例会有较大的变化．

Pressure Drop Model for Two-cone Light Dispersion Hydrocyclones

It is very necessary to know the effects of various parameters on pressure drop in optimum design of a hydrocyclone.Based on the fluid flow inside light dispersion hydrocyclones,an analytical model is estab- lished to calculate pressure drop in the conical zone of hydrocyclones.Analyses show that the calculated pres- sure drop in this zone represents the“effective”pressure drop necessary for conversion of static energy to dy- namic energy in the separation zone,and that the one in the inlet area determines the pressure loss for achiev- ing changes in direction and cross-section area of fluid flow bundle.It is reasonable to say that higher“effec- tive”pressure drop ratio indicates more energy effectively consumed in the separation of two-phase liquid in- side hydrocyclones.Comparisons of calculated pressure drop to the measured reveal that this pressure drop ra- tio is approximately constant for a certain hydrocyclone when fluid properties keep the same.However,it will be significantly changed if structural parameters or fluid properties change.