基于喉嘴距的液固射流泵泵效数值分析

Pump Efficiency Numerical Analysis of Liquid-Solid Jet Pump Based on Throat Mouth Distance

为了研究在不同固相初始体积分数时,喉嘴距对液固射流泵性能的影响,确定最优喉嘴距,应用ANSYS软件对液固射流泵进行数值计算,采用标准k-ε模型分析液固射流泵内部流动特征,计算在不同喉嘴距、不同固相初始体积分数时射流泵的性能曲线参数,并对其效率曲线进行比较。结果显示:当喉嘴距不变时,随着质量流量比的增大,压力比逐渐减小;当质量流量比不变时,随着喉嘴距的增大,液固射流泵的效率先增大后减小;在固相初始体积不变时,随着质量流量比的增大,喉嘴距对液固射流泵效率的影响增强。随着固相初始体积分数的增加,液固射流泵的性能曲线下降;在不同固相初始体积分数时,喉嘴距为1倍喷嘴直径时,液固射流泵的效率最高,最优喉嘴距为1倍喷嘴直径。

In order to study the effect of throat mouth distance on the performance of liquid- solid jet pump at different initial solid- phase volume fractions and to determine the optimal throat mouth distance, the liquid- solid jet pump is numerically calculated by ANSYS software. The k-ε standard model is used to analyze the internal flow characteristics of liquid- solid jet pump, the performance curve parameters of jet pump with different throat mouth distances and different solid phase initial volume fractions are calculated, and their efficiency curves are compared. The results show that when throat mouth distance is constant,pressure ratio gradually decreases with the increase of mass flow ratio. When mass flow ratio is constant,the efficiency of the liquid-solid jet pump increases first and then decreases as the throat distance increases. When the initial volume of the solid phase is constant,the effect of throat mouth distance on the efficiency of liquid-solid jet pump increases as the increase of mass flow ratio. As the initial volume fraction of the solid phase increases, the performance curve of liquid- solid jet pump decreases. With different solid phase initial volume fractions, when the throat mouth distance is 1-time nozzle diameter,the liquid-solid jet pump has the highest efficiency,and the optimal throat mouth distance is 1-time nozzle diameter.