自驱型旋转式压力能交换器的结构优化与动态性能研究

Structure Optimization and Dynamic Performance Study of Self-driven Rotary Pressure Exchanger

通过建立不同结构与动态操作参数下的自驱动压力交换器数值模型,分析了转子长度、端盖通道覆盖孔道个数及螺旋升角等结构参数对设备性能的影响规律,得到了不同操作参数下设备动态运行特性的变化规律,研究结果表明:转子长度为影响体积混合度的主要结构参数,增大转子长度可有效控制流体混合程度;随着进流速度增大,转子转速线性增大,流体混合加剧,压力交换效率显著减小;孔道与端盖存在动静干涉,使得高压出口处产生压力脉动,导致流体压力出现损耗,且随着进流速度增大,压力损耗增大,有效压力交换减小;而进流压力的影响较小。

Through establishing the numerical model of self-driven pressure exchangers of different structures and dynamic operation parameters, the structural parameters like rotor length, number of covering ducts, spi- ral rise angles and the operational parameters which influencing the device performance were analyzed to obtain the change rule of the device＇s dynamic operation characteristics. The research results show that, the rotor＇s length mainly influences the volumetric mixing degree, and its increase can effectively control the fluid mixing rate ; with the increase of inflow velocity, the rotary speed increases linearly together with enhanced mixing de- gree and obviously decreased pressure exchange efficiency. Both static and dynamic interferences at the ducts and end cover can result in fluid pressure loss and with the increasing of inflow velocity, the pressure loss be- comes increased together with a decreased effective exchange pressure, and the inflow pressure has small influ- ence.