卷盘式喷灌机水涡轮发展与研究现状

为解决国产水涡轮效率低的问题,回顾了国内外卷盘式喷灌机的发展及研究历程和早期对水涡轮的研究,综述了近5 a国内研究人员围绕国产JP50和JP75两种水涡轮所开展的外特性试验、CFD分析和改进措施等研究现状.概述了国外目前常见的冲击式和径流式两种水涡轮的结构类型,重点介绍了国内学者针对引进国外的一种进口为射流冲击式结构的水涡轮所开展的创新性研究,在试验和CFD模拟的基础上,发现这种结构水涡轮的内外特性比国产水涡轮有很大提高,并通过正交试验分析了各种参数对性能的影响,采用GA_-BP优化算法进行了进一步优化设计,获得了一种优化的水涡轮模型,CFD分析和试验都证明,优化水涡轮的内外性能全面超过了国外水涡轮.最后,总结了水涡轮研究存在的不足,提出了今后对水涡轮研究的改进建议.

Development and research status of water turbine for hose reel irrigator

In order to solve the problem of the low efficiency of domestic water turbines, the development and research history of hose reel irrigator, and the early research of water turbine were reviewed. The hydraulic performance test, CFD analysis and improvement measures carried out by domestic researchers around JP75 and JP50 water turbines in the nearly five years were also reviewed. In addition, the impulse and radial flow water turbines commonly used in foreign countries were reviewed. The innovative research on an introductied water turbine with jet impulse inlet carried out by domestic researchers was emphatically described. The performance of this kind of water turbine was found to be much better than that of domestic water turbines based on experiment and CFD simulation, and the orthogonal test was used to analyze the influence of various parameters on the performance and the GA_-BP optimization algorithm was used to conduct further optimization. Then an optimized water turbine model was obtained. CFD analysis and experiment proved that the internal and hydraulic performance of the optimized water turbine fully surpassed the foreign water turbine. Finally, the shortcomings of water turbine research were summarized, and improvement suggestions were proposed.