旋转水斗内的非定常射流干涉  

Unsteady Jet Interference in a Rotating Bucket

作　　者：韩凤琴[1] 肖业祥[1] 久保田乔[1] 

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2007年第6期25-28,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50379015)

摘　　要：采用动画解析法将冲击式水轮机旋转水斗内部的非定常流动进行时间和空间离散,在各离散的动画单元用拉格朗日法计算流体粒子的运动,模拟了非定常自由水膜流.对同一水斗,将第二射流的流动解析结果与对应的第一射流流态结果相叠加,就可根据叠加的水膜流态判断旋转水斗内的射流干涉现象.文中解析得到了旋转水斗内的射流干涉现象,并将其与模型试验照片的干涉现象进行了比较,确认发生了几乎相同的水膜流干涉.The discretization in time and space domains of the unsteady water flow in a rotating bucket of Pelton turbine is carried out using animated cartoon frames. Then, by applying Lagrangean approach to the movement calculation of the flow particles in each discrete frame, the unsteady water sheet flow in a rotating bucket is simulated. Moreover, by superimposing the result of flow analysis under the second jet on the one under the first jet, the jet interference in a bucket is numerically verified. Based on the comparison between the numerical prediction results of the jet interference in a bucket with the photograph of visual observation taken by the model test, it is finally confinned that the water sheet flow interference is practically the same.

关 键 词：射流干涉 旋转水斗 多喷嘴 冲击式水轮机 数值解析 

分 类 号：TK730[交通运输工程—轮机工程]