| 离心泵压水室内部定常和非定常流动PIV测量 |
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| 引用本文： | 邵春雷,顾伯勤,陈 晔.离心泵压水室内部定常和非定常流动PIV测量[J].农业工程学报,2010,26(7):128-133. |
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| 作者姓名： | 邵春雷 顾伯勤 陈 晔 |
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| 作者单位： | 南京工业大学机械与动力工程学院,南京,210009 |
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| 基金项目： | 南京工业大学青年教师学术基金（39702008）；中国石油化工集团公司科技开发项目（309007） |
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| 摘 要： | 为研究离心泵压水室内的流动特性，利用PIV技术在内同步和外同步模式下分别测量了其内部的定常和非定常流场，详细分析了压水室内部流动现象和流动规律。结果表明，压水室内速度沿轴向分布均匀，随圆周角增大而减小；在叶轮和压水室的交界处，存在清晰的速度分界线；受蜗舌的分流作用，部分流体回流入叶轮流道，扩散管入口处速度显著降低；压水室内部周期性非定常流动规律明显，第VIII断面上，速度的大小和波动幅度沿径向均呈减小趋势，周向速度的波动与叶轮流道内部高速流区的位置有关，而径向速度的波动主要受叶片干扰和哥氏力的影响。研究结果为压水室设计以及离心泵内部流动的试验研究提供了借鉴。
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| 关 键 词： | 离心泵，定常流动，非定常流动，压水室，粒子图像测速 |
| 收稿时间： | 2009/10/23 0:00:00 |
| 修稿时间： | 2010/1/27 0:00:00 |
Measurement of steady and unsteady flow in centrifugal pumps spiral casing using PIV |
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| Shao Chunlei,Gu Boqin,Chen Ye.Measurement of steady and unsteady flow in centrifugal pumps spiral casing using PIV[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(7):128-133. |
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| Authors: | Shao Chunlei Gu Boqin Chen Ye |
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| Abstract: | To study the flow characteristics in the spiral casing of centrifugal pump, steady and unsteady flow fields were measured by PIV under the modes of internal synchronization and external synchronization, respectively. Flow phenomenon and regular pattern in the spiral casing were analyzed in detail. The results show that the velocity in the spiral casing distributes homogeneously in axial direction, and decreases with the increase of angle of circumference. The velocity dividing line between the impeller and the spiral casing is clear. Partial fluid flows back to the impeller passage and the velocity in the inlet of diffusion tube decreases significantly due to shunt effect of the volute tongue. It is obvious that the unsteady flow in the spiral casing is periodic. On the VIII section, the magnitude and fluctuation range of velocity show a decreasing trend in radial direction. The fluctuation of circumferential velocity is related to the position of high-speed flow in impeller passage, and the fluctuation of radial velocity is influenced by blade interference and Coriolis force. The results provide valuable information for the design of spiral casing and the experimental study on flow in the centrifugal pump. |
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| Keywords: | centrifugal pumps steady flow unsteady flow spiral casing particle image velocimetry (PIV) |
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