进水池对斜流泵叶轮动态径向力的影响研究

发布时间：2018-04-25 01:30

本文选题：斜流泵 + 进水池　；参考：《水泵技术》2016年05期

【摘要】：为了解斜流泵叶轮动态径向力在进水池内的变化规律,基于RNG k-ε湍流模型,对有、无进水池时的斜流泵模型进行了数值模拟,研究了进水池对叶轮动态径向力的影响规律。结果显示,叶轮动态径向力的大小和方向均随时间呈周期性变化,其在0频、叶频和2倍叶频处产生明显的峰值,且峰值的频率特性不受进水池和工况变化的影响。随着流量减小,径向力系数峰值逐渐增大,流量从1.0Q_0减至0.6Q_0时,0频和叶频处的峰值明显增大,有进水池时的增幅要远大于无进水池的情况。在进水池影响下,0.2Q_0工况时,0频和叶频径向力系数峰值的X轴分量C_(dx)较无进水池时约增大14倍和4倍,Y轴分量Q_(dy)较无进水池时约增大18倍和4倍。该结果为斜流泵机组的稳定运行和优化提供了参考。
[Abstract]:In order to understand the change law of dynamic radial force in the inlet pool of the impeller of a slanted flow pump, based on the RNG k- - e turbulence model, the numerical simulation of the model of the slanted flow pump when there is no intake pool is carried out. The effect of the inlet water on the dynamic radial force of the impeller is studied. The results show that the size and direction of the dynamic axial force of the impeller are periodically changed with the time. The peak value of the 0 frequency, leaf frequency and 2 times leaf frequency is obvious, and the frequency characteristics of the peak value are not affected by the change of the intake pool and working condition. With the decrease of the flow rate, the peak value of the radial force coefficient increases gradually. When the flow rate decreases from 1.0Q_0 to 0.6Q_0, the peak value of the 0 frequency and the leaf frequency increases obviously, and the increase in the intake pool is much greater than that in the non intake pool. Under the influence of the inlet pool, the X axis component C_ (DX) of the 0 frequency and the peak value of the radial force coefficient of the blade frequency is about 14 and 4 times higher than that in the non entering tank, and the Y axis component Q_ (Dy) increases about 18 times and 4 times that of the non entering tank. The result provides a reference for the stable operation and optimization of the slanted flow pump unit.

【作者单位】：江苏大学现代农业装备与技术教育部重点实验室;
【基金】：中国博士后科学基金(编号:2015M581741) 江苏大学高级人才科研启动基金(编号:14JDG030)
【分类号】：TH313

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