基于CFD和RP技术的水泵叶轮设计研究
发布时间：2018-09-08 10:00
【摘要】：我国每年各种泵的耗电量约占全国总耗电量的20.9%,其中离心水泵的应用量大面广,广泛应用在农业、石油化工、航空航天、矿山等领域。由于离心水泵叶轮结构的复杂性造成离心水泵内部复杂的流动状态,研究离心水泵内部流动,对于离心水泵主要结构零部件的优化设计,从而提高离心水泵的性能和效率、避免泵在偏工况下运行具有重要意义。本文针对20B4型多级离心水泵,提出将流体计算动力学(CFD)方法和快速成型(RP)方法相结合,很大程度上缩短了开发新泵由设计到成品的时间,为厂家提供了一种新的生产方法。 本文基于传统的离心泵设计方法和现代CAD设计技术,应用三维建模软件Solidworks对20B4型多级离心水泵其中一级包括进口通道、叶轮、导叶和出口通道等流动区域进行三维建模,将物理模型导入Gambit软件进行非结构化网格划分,并对网格做出相应调整,使其平滑没有坏点。 应用商用CFD软件Fluent对九种在不同流量下的工况进行全流场的数值模拟。对额定工况下总压分布图、静压分布图以及相对速度矢量图和绝对速度矢量图进行模拟分析,模拟结果表明,流场分布均匀,未出现明显的回流,尾迹等现象,例如在进口处发生回流,在有的流道内发生尾迹但是不太明显。对模拟结果进行性能预测,得到扬程、轴功率、效率与流量关系,发现了扬程随流量的增加而减小,效率随流量先增加后减小等规律。考虑机械损失和容积损失,通过预测特性曲线与实验特性曲线相对比,发现两者吻合比较良好,验证了模拟计算的可靠性。 利用HRPS-IV粉末烧结快速成型设备对叶轮模型进行粉末叶轮制造,之后制作树脂叶轮。对树脂叶轮进行实验测试,根据实验结果可以看出离心水泵工作稳定,性能较好。验证了用树脂叶轮代替实验件的可靠性和可行性。
[Abstract]:The power consumption of various pumps in China accounts for about 20.9 percent of the total electricity consumption in China every year. The centrifugal pumps are widely used in agriculture, petrochemical industry, aerospace, mining and other fields, among which the centrifugal pumps are widely used in the fields of agriculture, petrochemical industry, aerospace, mining and so on. Because of the complex structure of centrifugal pump impeller, the internal flow of centrifugal pump is complicated. The optimization design of main structural parts of centrifugal pump is studied, so as to improve the performance and efficiency of centrifugal pump. It is of great significance to avoid the operation of the pump under off-condition. In this paper, for 20B4 type multistage centrifugal pump, the combination of fluid computational dynamics (CFD) method and rapid prototyping (RP) method is proposed, which greatly shortens the time of developing new pump from design to finished product, and provides a new production method for manufacturers. Based on the traditional centrifugal pump design method and modern CAD design technology, the three-dimensional modeling software Solidworks is used to model the flow zone of 20B4 multistage centrifugal pump, which includes inlet passage, impeller, guide vane and outlet passage. The physical model is imported into Gambit software for unstructured grid division, and the grid is adjusted accordingly to make it smooth without any harm. The commercial CFD software Fluent is used to simulate the whole flow field in nine different flow conditions. The total pressure distribution, static pressure distribution, relative velocity vector and absolute velocity vector are simulated and analyzed under rated working conditions. The simulation results show that the flow field is uniformly distributed, and no obvious phenomena such as backflow and wake are found. For example, reflux occurs at the inlet and wake occurs in some channels but is less obvious. Based on the performance prediction of the simulation results, the relations among head, shaft power, efficiency and flow rate are obtained. It is found that the lift decreases with the increase of flow rate, and the efficiency increases first and then decreases with the flow rate. Considering the mechanical loss and volume loss, by comparing the predicted characteristic curve with the experimental characteristic curve, it is found that the two curves are in good agreement, and the reliability of the simulation calculation is verified. The powder impeller was manufactured by HRPS-IV powder sintering rapid prototyping equipment, and then resin impeller was made. The experimental results of resin impeller show that the centrifugal pump works stably and has good performance. The reliability and feasibility of replacing the experimental part with resin impeller are verified.
【学位授予单位】：沈阳航空航天大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311
本文编号：2230193
[Abstract]:The power consumption of various pumps in China accounts for about 20.9 percent of the total electricity consumption in China every year. The centrifugal pumps are widely used in agriculture, petrochemical industry, aerospace, mining and other fields, among which the centrifugal pumps are widely used in the fields of agriculture, petrochemical industry, aerospace, mining and so on. Because of the complex structure of centrifugal pump impeller, the internal flow of centrifugal pump is complicated. The optimization design of main structural parts of centrifugal pump is studied, so as to improve the performance and efficiency of centrifugal pump. It is of great significance to avoid the operation of the pump under off-condition. In this paper, for 20B4 type multistage centrifugal pump, the combination of fluid computational dynamics (CFD) method and rapid prototyping (RP) method is proposed, which greatly shortens the time of developing new pump from design to finished product, and provides a new production method for manufacturers. Based on the traditional centrifugal pump design method and modern CAD design technology, the three-dimensional modeling software Solidworks is used to model the flow zone of 20B4 multistage centrifugal pump, which includes inlet passage, impeller, guide vane and outlet passage. The physical model is imported into Gambit software for unstructured grid division, and the grid is adjusted accordingly to make it smooth without any harm. The commercial CFD software Fluent is used to simulate the whole flow field in nine different flow conditions. The total pressure distribution, static pressure distribution, relative velocity vector and absolute velocity vector are simulated and analyzed under rated working conditions. The simulation results show that the flow field is uniformly distributed, and no obvious phenomena such as backflow and wake are found. For example, reflux occurs at the inlet and wake occurs in some channels but is less obvious. Based on the performance prediction of the simulation results, the relations among head, shaft power, efficiency and flow rate are obtained. It is found that the lift decreases with the increase of flow rate, and the efficiency increases first and then decreases with the flow rate. Considering the mechanical loss and volume loss, by comparing the predicted characteristic curve with the experimental characteristic curve, it is found that the two curves are in good agreement, and the reliability of the simulation calculation is verified. The powder impeller was manufactured by HRPS-IV powder sintering rapid prototyping equipment, and then resin impeller was made. The experimental results of resin impeller show that the centrifugal pump works stably and has good performance. The reliability and feasibility of replacing the experimental part with resin impeller are verified.
【学位授予单位】：沈阳航空航天大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH311
【参考文献】
相关期刊论文 前8条
1 崔建芳;党惊知;白培康;王建宏;;PS粉末激光烧结快速成型技术及其在铸造中的应用[J];工程塑料应用;2005年10期
2 李鹏,熊惟皓;选择性激光烧结的原理及应用[J];材料导报;2002年06期
3 夏卿坤;快速成型技术[J];长沙大学学报;2005年05期
4 李文广;离心泵叶片设计理论与应用研究进展综述[J];水泵技术;1998年05期
5 杨家林 ,王洋 ,陈杨;快速成型技术研究现状与发展趋势[J];新技术新工艺;2003年01期
6 黄树槐,张祥林,马黎,黄乃瑜;快速原型制造技术的进展[J];中国机械工程;1997年05期
7 潘东杰，黄列群，沈永华，薛存球，，何芝梅，马益诚;快速成形—先进的现代制造技术[J];铸造技术;1999年04期
8 张建华,赵剑峰,余承业;基于选择性激光烧结的铸造熔模快速制造技术[J];铸造;2000年12期
相关硕士学位论文 前1条
1 徐俭;快速成型技术的应用研究[D];大连理工大学;2003年
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