摘要：基于自行设计的立式环形流道连续流动静电聚结试验装置和高压/高频交流电源,较为系统地研究了电压、频率、脉宽比、电场停留时间等参数对W/O型乳化液中分散相水颗粒静电聚结特性的影响。结果表明:电场停留时间和电压是影响水颗粒聚结效果的主要因素;频率、脉宽比对水颗粒聚结效果影响较小,但对电能消耗产生重要影响。因此必须结合特定的乳化液,综合考虑聚结效果、处理效率和能量消耗,选择合理的操作条件。

摘要：The paper is concerned with the fluid flow in the impeller side clearances of a centrifugal pump with volute *** flow conditions in these small axial gaps are of significant importance for a number of effects such as disk friction,leakage losses or hydraulic axial thrust to name but a *** the investigated single stage pump,the flow pattern in the volute turns out to be asymmetric even at design flow *** gain a detailed insight into the flow structure,numerical simulations of the complete pump including the impeller side clearances are ***,the hydraulic head and the radial pressure distributions in the impeller side clearances are measured and compared with the numerical *** configurations of the impeller,either with or without balancing holes,are ***,three different operating points,i.e.:design point,part load or overload conditions are *** addition,analytical calculations are accomplished to determine the pressure distri-butions in the impeller side *** accurate boundary conditions are available,the 1D flow models used in this paper can provide reasonable results for the radial static pressure distribution in the impeller side ***,a counter rotating wake region develops in the rear impeller side clearances in absence of balancing holes which severely affects the inflow and outflow conditions of the cavity in circumferential direction.

摘要：Small-sized axial fans are used as air cooler for electric *** there is a strong demand for higher power of fans according to the increase of quantity of heat from electric ***,higher rotational speed design is conducted,although,it causes the deterioration of efficiency and the increase of ***,the adoption of contra-rotating rotors for the small-sized axial fan is proposed for the improvement of *** the case of contra-rotating rotors,it is necessary to design the rotor considering the unsteady flow condition of each front and rear *** the present paper,the fan performance of the contra-rotating small-sized axial fan with 100mm diameter at a designed and a partial flow rates is shown,and the unsteady flow conditions at the inlet and the outlet of each front and rear rotor are clarified with unsteady numerical ***,the relation between the performance and the unsteady flow condition of the contra-rotating small-sized axial fan is discussed and the methods to improve the performance are considered.

摘要：分析了带绝缘层矩形流道电场强度的影响因素以及分散相水颗粒在均匀交流电场下的聚结机理,设计了矩形流道连续流动静电聚结实验装置。以矩形波高压/高频脉冲交流电源为基础,研究电场强度、脉冲频率、脉宽比、流动速度等参数对不同W/O型乳化液中分散相水颗粒静电聚结特性的影响。实验结果表明,含水率为5%、电场强度为1.69kV/cm、流动速度为0.17m/s、脉宽比为40%、脉冲频率为1000Hz,水颗粒粒径能增长24倍,聚结效果明显。

摘要：实验室版本Romaco Innojet VENTILUS V 5主要用于制粒,干燥和药物包衣,可处理的颗粒范围是10μm至2mm。由于其特殊的设计,增强了加工效率,VENTILUS V5缩短了 25%的批次处理时间。在圆柱形产品容器内的均匀流动条件使每批次的混合动作极其柔和。整个操作过程的空气由位于底部的ORBITER导流盘控制,该独创性组件位于容器底部,由多层圆盘组成。配合中央底部的喷嘴ROTOJET,共同组成了一个创新工作单元,并且满足生产线扩充产能的所有要求。