多孔淹没出流消力池复杂流态分析  

Investigation on Complex Flow Pattern of Multi-submerged Jets into Plunge Pool

作　　者：高鹏[1] 杨永全[1] 邓军[1] 张建民[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《四川大学学报（工程科学版）》2006年第5期70-75,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50479062)

摘　　要：多孔淹没出流条件下,每股射流周围存在上部回流旋滚和下部横轴漩涡,两股射流之间还可能发生立轴漩涡,消力池内流态十分复杂。为详细了解立轴漩涡是否贯穿,并揭示其产生的根源及运动特性,运用实验观察、理论分析和数值模拟研究其水力特性。结果表明:消力池底部的立轴漩涡是由于三维强紊动水流与边界条件联合作用产生的;立轴漩涡随机不稳定,未贯穿至底板,并随着底部横轴漩滚的形成逐步消失。但立轴漩涡可能存在的危害需作进一步研究。The flow pattern is very complex in the plunge pool with multi-submerged jets plunging into it. Around each jet, there are a lot of back-flow swirls near the water surface and cross rod eddies close to the bottom; besides, vertical-axis eddies may appear between two jets. To research the hydraulic characteristics and occurring mechanics and whether the vertical-axis eddies can reach the bed, experiments, theories and numerical simulation are applied in this paper. The results show that the vertical-axis eddies near the plunge pool bed are caused by the interaction of the 3 - D violent turbulent and boundary conditions ; the vertical-axis eddies are often random and unsteady. They can not reach the bed, and will gradually disappear with the formation of the cross rod eddy, however, their potential damage need to be further studied.

关 键 词：多孔淹没出流 消力池 横轴旋滚 立轴漩涡 

分 类 号：TV135.2[水利工程—水力学及河流动力学]