摘要
为深入了解半开式切割泵内部固液两相流动状态,基于ANSYSCFX软件,采用标准k-ε湍流模型,在不同固相体积分数和不同流量工况下,研究了叶轮叶片不同位置处的固相体积分布及速度分布,以及切割泵旋转刀处的固相体积分布及速度分布,并对磨损情况进行相应预测.分析了固相和液相对于内流场的影响.结果表明:分布在叶片压力面的固相速度整体小于吸力面,而固相体积分数却大于吸力面;叶片尾部固相速度最大,叶片头部固相体积分数最大;对于旋转刀,位于工作面旋转刀出口处和背面靠近转轴处的固相速度较大,位于工作面靠近转轴处固相体积分数较大,因而磨损预计较为严重,而旋转刀背面整体体积分数较小;不同流量工况对于压力分布、速度分布、固相分布有较明显的影响.
To deeply understand the solid-liquid two-phase flow state and predict the wear of the semi open cutting pump, the standard k-ε turbulence model was used based on the ANSYS CFX. The distributions of particle volume and velocity of blades under different solid volume fractions and flow rates were investigated, and the distributions of particle volume and velocity of rotating blades were also analyzed. The effects of solid and liquid phases on inner flow field were discussed. The results show that the velocity distribution of solid phase on the blade pressure surface is lower than that on the suction surface, while the volume fraction is larger than that on the suction surface. The largest velocity of solid phase is obtained on the blade tail, while the largest solid volume fraction of solid phase is obtained at the blade head. For the rotating blade, the solid phase velocities at the exit of working face and the back face near rotating shaft are large, while the solid volume fraction is large at the working surface near the rotating shaft with severe wear. The flow conditions have obvious effects on pressure distribution, velocity distribution and solid distribution.
作者
曹卫东
姜昕
张骞
徐玉敏
CAO Weidong;JIANG Xin;ZHANG Qian;XU Yumin(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
出处
《江苏大学学报（自然科学版）》
EI
CAS
北大核心
2019年第5期531-537,共7页
Journal of Jiangsu University：Natural Science Edition
基金
国家重点研发计划项目(2018YFC0810506)
镇江市重点研发计划项目(SH2017049)
关键词
切割泵
固液两相流
叶片
旋转刀
数值计算
cutting pump
solid-liquid two-phase flow
impeller
rotating blade
numerical calculation
