摘要
为分析混排一体化装置内部的固液混合性能,以SH20混砂车混排一体化装置为原型,运用CFD方法研究装置内部固液混合效果,以固液两相体积分布和出口密度分布为指标对混合效果进行评价,并以混合时间和单位体积混合能为指标,对不同叶片数量和不同叶轮半径下的混合效率进行了分析。分析结果表明:SH20混砂车混排一体化装置出口段出现轻微的石英砂和清水分层现象,对装置进行了结构改进,改进后的装置固液混合均匀,混合效果良好,含砂体积分数可达30%;随着叶片数的递增,混合时间先缩短后延长,单位体积混合能先增大后减小再增大;随着叶轮半径的增大,混合时间先缩短后延长再缩短,单位体积混合能逐渐增大;叶片数为7和叶轮半径为248 mm时,装置混合效率最高。所得结论可为混合搅拌装置的优化提供参考。
The physical model, based on the mixing-discharging integrated device of the SH20 blender truck, was developed to analyze its solid-liquid blending performance.The computational fluid dynamics(CFD) method was applied to investigate the internal solid-liquid blending, of which the performance was evaluated with respect to the volumetric fractions of the solid and liquid phases and the outlet mixture density.Moreover, with the indexes of the blending time and blending energy per unit volume, the blending efficiency in cases of different quantities and radii of impellers was analyzed.The analysis results show that slight stratified separation between quartz sands and clear water occurs at the outlet section of the mixing-discharging integrated device of the SH20 blender truck.Then, the device structure is modified, after which the blending performance is well improved, with the uniform solid-liquid mixture and proppant volumetric fractions up to 30%.With the increasing impeller radius, the blending time first shortens and then grows, while the blending energy per unit volume gradually climbs up.In the case of 7 impellers with a radius of 248 mm, the blending efficiency is maximized.The research results provide references for optimizing blending devices.
作者
宋康康
李美求
黄天成
宋德双
Song Kangkang;Li Meiqiu;Huang Tiancheng;Song Deshuang(Mechanical Structures Strength and Vibration Research Institute,Yangtze University)
出处
《石油机械》
北大核心
2023年第1期103-109,共7页
China Petroleum Machinery
基金
江苏省海洋及陆上油气井口设备工程技术研究中心开放基金项目“压裂混砂车螺旋输砂器输送机理研究”(DS2020012-1)。
关键词
混排一体化装置
固液混合
混合时间
混合能
混合效率
出口密度
mixing-discharging integrated device
solid-liquid blending
blending time
blending energy
blending efficiency
outlet density
