基于分段四次速度矩分布的叶片式气液混输泵导叶设计方法

doi:10.3901/JME.2022.10.280

机械工程学报 ›› 2022, Vol. 58 ›› Issue (10): 280-288.doi: 10.3901/JME.2022.10.280

• 可再生能源与工程热物理 • 上一篇下一篇

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基于分段四次速度矩分布的叶片式气液混输泵导叶设计方法

刘明^1,2, 谭磊^1,2, 曹树良^1,2

1. 清华大学能源与动力工程系北京 100084;
2. 清华大学水沙科学与水利水电工程国家重点实验室北京 100084

收稿日期:2021-05-08 修回日期:2021-10-23 出版日期:2022-05-20 发布日期:2022-07-07
通讯作者: 谭磊(通信作者)，男，1984年出生，博士，特别研究员，博士研究生导师。主要从事流体机械及工程研究。E-mail：tanlei@mail.tsinghua.edu.cn
作者简介:刘明，男，1994年出生，博士研究生。主要从事流体机械及工程研究。E-mail：lium16@mails.tsinghua.edu.cn
基金资助:
国家重点研发计划(2020YFB1901401)和水沙科学与水利水电工程国家重点实验室自主科研(2021-KY-04)资助项目。

Design Method of Diffuser in Rotodynamic Multiphase Pump Based on Fourth-order Distribution of Velocity Moment

LIU Ming^1,2, TAN Lei^1,2, CAO Shuliang^1,2

1. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084;
2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084

Received:2021-05-08 Revised:2021-10-23 Online:2022-05-20 Published:2022-07-07

摘要/Abstract

摘要： 叶片式气液混输泵是深海油气资源开采的核心装备,导叶对其输运性能影响较大,而混输泵导叶设计相关的研究很少。提出一种基于分段四次速度矩分布的叶片式气液混输泵导叶设计方法,利用三段四次函数控制导叶速度矩的分布规律,通过给定控制点流线长度及载荷等参数确定分布规律。将该设计方法应用到三级叶片式气液混输泵中,并选取轮毂前控制点载荷L_1h、轮毂前后控制点载荷差ΔL_h、轮缘前控制点载荷L_1s、轮缘前后控制点载荷差ΔL_s、前控制点流线长度m₁、后控制点流线长度m₂、起点载荷系数k₀等7个参数,对混输泵导叶进行7因素3水平的L₁₈(3⁷)正交优化。完成混输泵导叶设计和优化后,泵效率在单相和两相工况下分别平均提升6.73%和4.10%。优化前后的流场显示,导叶内流场低速区范围明显缩小,流动分离的范围和强度都受到了明显抑制。

关键词: 叶片式气液混输泵, 导叶, 分段四次速度矩, 设计方法, 优化

Abstract: Rotodynamic multiphase pumps are the key equipment for exploitation of deep-sea oil and gas resources, and the geometry of diffuser is a significant factor for transporting performance. A blade design method based on segmented fourth-order distribution of velocity moment is proposed in the present work. The distribution of diffuser velocity moment is controlled by three-stage fourth-order polynomial functions, and this distribution law is determined according to parameters of control points and corresponding point. This design method is applied to a three-stage rotodynamic multiphase pump. The seven parameters of loading at hub former control point location L_1h, loading difference between hub former and latter control points ΔL_h, loading at shroud former control point location L_1s, loading difference between shroud former and latter control points ΔL_s, former control point m₁, latter control point m₂, start loading coefficient k₀ are selected, and an orthogonal optimization of 7 factors and 3 levels L₁₈(3⁷) is carried out for diffuser geometry. After design and optimization of diffuser, the pump efficiency under single-phase and multi-phase conditions are improved by 6.73% and 4.10%, respectively. The comparison between flow fields before and after optimization shows that, the range and degree of flow separation in diffuser have been suppressed.

Key words: rotodynamic multiphase pump, diffuser, fourth-order distribution of velocity moment, design method, optimization

中图分类号:

TG156

刘明, 谭磊, 曹树良. 基于分段四次速度矩分布的叶片式气液混输泵导叶设计方法[J]. 机械工程学报, 2022, 58(10): 280-288.

LIU Ming, TAN Lei, CAO Shuliang. Design Method of Diffuser in Rotodynamic Multiphase Pump Based on Fourth-order Distribution of Velocity Moment[J]. Journal of Mechanical Engineering, 2022, 58(10): 280-288.

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基于分段四次速度矩分布的叶片式气液混输泵导叶设计方法

Design Method of Diffuser in Rotodynamic Multiphase Pump Based on Fourth-order Distribution of Velocity Moment

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