泥沙输送系统中并联泵出口侧分叉接头的结构优化及流动计算  

Optimization and Flow Simulation for the Bifurcate Junction at the Outlet of Parallel Pump in a Sand Transportation System

作　　者：史威[1] 罗先武[1] 许洪元[1] 董纪全 丁惠新 

机构地区：[1]清华大学,北京100084 [2]山东菏泽市黄河河务局,山东菏泽274000

出　　处：《流体机械》2008年第4期12-15,共4页Fluid Machinery

基　　金：国家自然科学基金项目(50676044);北京市自然科学基金项目(3072008)

摘　　要：针对黄河清淤固堤工程中泥沙输送系统,主要考虑了抽沙平台泵出口侧多通接头的结构优化以改善系统的水力性能。对6种多通接头模型基于三维紊流数值模拟方法进行了流动分析。根据计算结果,总结了各种多通接头的分叉结构对局部流动状态和水力损失的影响,分析了最优模型。研究表明:根据实际的管路连接需求,多通接头的分叉部支管应采用面积均匀变化的圆锥管;减少分叉的数量,能适当减小水力损失;确定多通接头的最佳模型,以获得最优水力性能。Against the sand transportation system used in the Yellow River sand-dredging ＆ bank-strengthening project mainly optimizing the structure of multiple-pass junction at the outlet of a sand-dredging pumping platform was analyzed to improve the hydraulic performance of the system. The flow analysis has been conducted based on 3D turbulent numerical simulation for 6 types of multiple-pass junction. Based on the calculation results, the effects of bifurcate structure on local flow and hydraulic loss are summarized, and the optimum model （bifurcate structure） has been discussed. It is noted that： the conical bifurcate with uniform area variation according to the actual connection requirement is suitable for bifurcate pipe ; less bifurcates result in less hydraulic loss; the optimized model of multiple-pass junction is necessary so as to achieve better hydraulic performance.

关 键 词：多通接头 水力损失 模型优化 

分 类 号：TB964[机械工程—光学工程]