JET FLOW ON STEPPED SPILLWAYS

被引：42

作者：

CHAMANI, MR

RAJARATNAM, N

机构：

[1] Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, AB

[2] Dept. of Civ. Engrg., Univ. of Alberta, Edmonton, AB

来源：

JOURNAL OF HYDRAULIC ENGINEERING-ASCE | 1994年 / 120卷 / 02期

关键词：

Energy dissipation;

D O I：

10.1061/(ASCE)0733-9429(1994)120:2(254)

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This technical note presents a method to estimate the energy loss on stepped spillways for the jet-flow regime, which occurs when the ratio of the critical depth y(c) to the height of the step h is less than approximately 0.8. It introduces the concept of alpha, the proportional energy loss per step, and using the extensive experimental results of Horner, a was evaluated. It was found that a is a function of y(c)/h and h/l, where l is the length of the step; and an equation has been developed that describes this variation. It was also found that the energy loss on a stepped spillway with a large number of steps can be very significant in the jet-flow regime. It also appears that for skimming flow, which occurs for y(c)/h larger than about 0.8, the average energy loss per step would be less than that for jet flow.

引用

页码：254 / 259

页数：6