摘要
在椭圆封头搅拌槽中根据行业标准建立了4种圆盘涡轮式搅拌器的几何模型,利用标准k-ε湍流模型和多参考系(MRF)方法,研究了叶片形状、搅拌速度、旋转方向和流型转变对搅拌功率、排出流量、泵出效率和剪切速率的影响。结果表明:叶片形状对功率、排出流量、泵出效率和流型转变的临界安装高度均有影响;径向流条件下,泵出效率排序为圆弧叶(反)>弯叶(正)>箭叶(反)>圆弧叶(正)>平直叶>箭叶(正)>弯叶(反);流型由径向流转变为轴向流后,搅拌功率及径向排出流量均下降。对标准搅拌器的性能评估为工业搅拌设备的选型和设计提供了参考依据。
Four geometries of disc turbine agitators were established in the oval-bottom stirred vessel according to industry standards. Standard k-ε turbulence model and multi-reference frame(MRF) method were used to study the influence of blade shape, speed, rotation direction and flow pattern on power, discharge flow, pumping efficiency and shear rate. The results show that blade shape has an impact on the power consumption, discharge flow, pumping efficiency and critical installation height of flow pattern transition. The pumping efficiency meets arc blade(reverse)>curved blade(positive)>arrow blade(reverse)>circular blade(positive)>straight blade>arrow blade(positive)>arrow blade(reverse) when the flow pattern is radial. With the flow pattern transiting from radial flow to axial flow, power and radial discharge flow are reduced. The performance analysis of standard agitators provides a reference for the selection and design of industrial agitators.
作者
王颖慧
郝琳
朱振兴
卫宏远
WANG Yinghui;HAO Lin;ZHU Zhenxing;WEI Hongyuan(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;Research Institute of Petroleum Processing,China Petroleum and Chemical Corporation,Beijing 100083,China)
出处
《化学工业与工程》
CAS
CSCD
北大核心
2023年第2期123-132,共10页
Chemical Industry and Engineering
基金
炼油工艺与催化剂国家工程研究中心(中国石油化工股份有限公司石油化工科学研究院)开放基金
国家重点研发项目(2018YFC0808600)。
关键词
圆盘涡轮式搅拌器
计算流体力学
叶片形状
功率消耗
泵出效率
disc turbine agitator
computational fluid dynamics
blade shape
power consumption
pumping efficiency
