摘要
为了研究涡流二极管泵的瞬态特性,采用大涡模拟的方法对泵的瞬态流动过程进行了数值模拟。计算中发现了"单胞涡"现象并记录了"单胞涡"的产生、发展等过程,最后将模拟结果与文献的实验数据进行了对比。结果表明:模拟结果与实验数据吻合良好;泵内的旋转流动具有明显的单胞涡特征,不同于水力旋流器;流量变化曲线的诸拐点与"单胞涡"的各演化阶段具有良好的对应,说明泵体内流量变化的原因主要是由流场中存在的"单胞涡"的变化所引起,当"单胞涡"发展至稳定阶段时,泵内流量变化也趋于稳定。
In order to study the transient performance of the vortex diode pump, the large eddy simulation （LES） was employed to simulate the transient flow pattern in the pump. During computation, the phenomenon of one cell vortex （OCV） was found and its developing process was recorded. Results show that the flow rate profile of the pump predicted by the simulation is in good agreement with the experimental data in the literature. The flow patterns in the pump with obvious characteristics of OCV differ from that of general swirling structures and the inflexions in the flow rate profile of the pump are in correspondence with the evolvement period of the OCV. It indicates that the flow rate variety of the vortex diode pump is caused by the change of ＂one cell vortex＂ in it, and the pump flow rate will change to be steady when the vortex matures.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2009年第4期572-576,共5页
Journal of Chemical Engineering of Chinese Universities
基金
浙江省自然科学基金项目(Y107467)
