基于载荷分布的潜水轴流泵叶轮与导叶水力设计

发布时间：2018-06-15 11:02

本文选题：潜水轴流泵 + 三维反问题设计方法　；参考：《农业机械学报》2017年11期

【摘要】：对潜水轴流泵进行三维反问题设计,以水力效率为设计目标,提出叶轮、导叶适合的载荷分布形式。通过正交试验设计、单因素分析和数值模拟的方法研究载荷参数对潜水轴流泵内外特性的影响,得到水力效率较优的载荷分布形式:叶轮叶片为前载型,导叶叶片为轮毂中载、轮缘前载型。具体的载荷参数取值范围:对于叶轮,斜率取值范围为-1~0,前载点取值范围为0.25~0.45,后载点取值范围为0.55~0.75;对于导叶,轮毂斜率在0附近取值,轮缘斜率取值范围为0~0.75,轮毂前载点取值范围为0.25~0.45,轮缘前载点在0.25附近取值,轮毂后载点取值范围为0.55~0.75。叶轮设计中发现:前载型叶片对原泵叶根尾缘的二次流有改善作用。导叶设计中发现:由于潜水轴流泵导叶的扩散式结构特点,导叶近壁面易出现分离涡,轮毂中载、轮缘前载型叶片能够有效地抑制导叶近壁面的涡分离。
[Abstract]:Three-dimensional inverse problem design of submersible axial flow pump is carried out. The suitable load distribution form of impeller and guide vane is put forward with hydraulic efficiency as the design goal. By means of orthogonal design, single factor analysis and numerical simulation, the influence of load parameters on the internal and external characteristics of submersible axial flow pump is studied. The load distribution forms with better hydraulic efficiency are obtained: the impeller blade is the front load type, the guide vane is the wheel hub load, Flange front load type. The specific range of load parameters is as follows: for impeller, the slope range is -1 ~ 0, the range of pre-load point is 0.25 ~ 0.45, and the range of post-loading point is 0.55 ~ 0.75. For guide vane, the wheel hub slope is taken near zero. The slope range of wheel rim is 0 ~ 0. 75, the range of wheel hub load point is 0. 25 ~ 0. 45, the value of wheel front load point is near 0.25, and the value range of wheel hub rear load point is 0. 55 ~ 0. 75. In the design of impeller, it is found that the preloaded vane can improve the secondary flow of the root tail edge of the original pump. In the design of guide vane, it is found that due to the diffusive structure characteristics of the guide vane of the submersible axial flow pump, the separation vortex is easy to appear near the wall of the guide vane, and the vanes loaded in the hub and the front load vane of the wheel edge can effectively restrain the vortex separation near the wall of the guide vane.
【作者单位】：中国农业大学水利与土木工程学院;北京供水管网系统安全与节能工程技术研究中心;中国水利水电科学研究院;上海连成(集团)有限公司;
【基金】：“十二五”国家科技支撑计划项目(2015BAD20B01)
【分类号】：TV136

【相似文献】