不同前缘后掠角的双叶片污水泵性能模拟与试验

为了研究前缘后掠角对前伸式双叶片污水泵水力性能的影响规律并大幅提高泵效率，基于某一款典型的前伸式双叶片污水泵（WQ800-40-132），设计了4个不同的叶轮模型，其前缘后掠角分别为60°、100°、140°、180°。利用ICEMCFD14.5软件对计算模型进行结构化网格划分，采用AnsysCFX14.5软件对网格模型进行基于标准k-ε湍流模型和可缩放壁面函数的全流场数值模拟，分别从泵的外特性及内流场分析了前缘后掠角对泵性能的影响规律，结果发现：随着前缘后掠角的增加，扬程流量曲线趋于平坦，轴功率则不断增大，最高效率点向大流量工况方向偏移；在大流量工况下（1.2Qn，Qn为设计流量），前缘后掠...

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Bibliographic Details
Published in农业工程学报 Vol. 30; no. 19; pp. 48 - 54
Main Author 陈刻强 施卫东 张德胜 郎涛 程成
Format Journal Article
LanguageChinese
Published 江苏大学流体机械工程技术研究中心,镇江,212013 2014
Subjects
前缘后掠角
双叶片污水泵
叶轮
数值方法
数值计算
水力设计
泵
impellers
前缘后掠角
pumps
hydraulic design
叶轮
leading edge back-swept angle
泵
double blades sewage pump
numerical method
数值计算
双叶片污水泵
水力设计
数值方法
numerical simulation
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2014.19.006

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Summary:为了研究前缘后掠角对前伸式双叶片污水泵水力性能的影响规律并大幅提高泵效率，基于某一款典型的前伸式双叶片污水泵（WQ800-40-132），设计了4个不同的叶轮模型，其前缘后掠角分别为60°、100°、140°、180°。利用ICEMCFD14.5软件对计算模型进行结构化网格划分，采用AnsysCFX14.5软件对网格模型进行基于标准k-ε湍流模型和可缩放壁面函数的全流场数值模拟，分别从泵的外特性及内流场分析了前缘后掠角对泵性能的影响规律，结果发现：随着前缘后掠角的增加，扬程流量曲线趋于平坦，轴功率则不断增大，最高效率点向大流量工况方向偏移；在大流量工况下（1.2Qn，Qn为设计流量），前缘后掠角的增大会导致进口前缘外周边的叶片工作面处出现回流，并在前缘上方形成旋涡，造成较大的水力损失。通过对数值模拟与样机试验的结果对比，发现模拟值与试验值有较小的差别，但整体趋势基本相同。该文的研究结果对双叶片污水泵的优化设计具有较好的参考价值。
Bibliography:11-2047/S
pumps;numerical method;impellers;leading edge back-swept angle;double blades sewage pump;hydraulic design;numerical simulation
The back-swept double blade sewage pump studied in the paper belongs to the new high efficiency non-clogging pump. It has a self-cleaning ability, and can effectively solve the problem of fiber winding and congestion. This research study designed to probe the effect of the leading edge back-swept angle on a forward-extended double blade sewage pump. By changing the leading edge shape to get different degrees of back-swept blade, four models of impellers with different back-swept angles of 60°, 100°, 140°, and 180° were created by BladeGen. According to the structure of the pump, we divided the fluid domain into six parts, namely entrance region, impeller, volute, front chamber, back chamber, and outlet section, which were modeled by Unigraphics NX. ICEM CFD software was used for dividing the structured mesh of each part, and the numerical simulation of the whole flow field was
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2014.19.006