多股水平淹没射流水力特性的影响因素研究  

Factors affecting the hydraulic characteristics of horizontal submerged jets

作　　者：李艳玲[1] 华国春[1] 张建民[1] 杨永全[1] 

机构地区：[1]四川大学水利水电学院,四川成都610065

出　　处：《水科学进展》2006年第6期761-766,共6页Advances in Water Science

基　　金：国家自然科学基金资助项目(50479062);四川大学青年基金资助项目(校200461)~~

摘　　要：采用数值模拟和模型试验相结合的方法,分析了水股分层、坎高、出口体型和跌坎形式等因素对多股水平淹没射流的流态稳定性和水力特性的影响。研究表明,多股多层水平淹没射流较单层多股水平淹没射流流态稳定性好、临底流速低、消能率高,是一种高效的新型消能方式。结合试验结果,提出中孔泄槽以等宽或微收缩为宜、表中孔最优坎高差应大于中孔水流的主流水深、跌坎形式的选择应结合具体工程特点等建议。Based on the 3-D numerical simulation and the model test, many factors affecting the flow pattern stability and the hydraulic characteristics of the horizontal Submerged Jets are studied. The results show that multi-lever and muhi-strand horizontal submerged jets are a new energy dissipation type and have better stability of flow patter, lower velocity in the slab and higher dissipated energy rate than the single-lever and the multi-strand horizontal submerged jets. Connecting to the model test, some suggestions, important for design, are put foward, for example, the chute width of intermediate outlet should be constant; the optimum height difference of drop between intermediate outlet and surface outlet should be larger than the water depth at intermediate outlet; and the type of drop should be changed with the characteristics of certain project.

关 键 词：水力学 水力特性 单层多股 多股多层 水平淹没射流 

分 类 号：TV131.22[水利工程—水力学及河流动力学]