渥奇面上掺气挑坎布设位置的探讨  

Research on the Location of the Bucket Aerator Laid on Arch Structure

作　　者：侯精明[1] 刘韩生[1] 宁燕[2] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]陕西省水利电力勘测设计研究院,西安710001

出　　处：《中国农村水利水电》2008年第9期99-101,107,共4页China Rural Water and Hydropower

摘　　要：渥奇面上设掺气挑坎,流速大时可能发生散水现象,强烈散水会对泄洪建筑物产生不利影响,应尽可能避免。经试验研究发现散水现象的强弱与掺气挑坎布设于渥奇面上的位置有关,布于下游明显弱于上游。主要原因是加设挑坎后,边界变化的剧烈程度不同,上游边界变化更为剧烈。实际布置中,在合理保护范围内,在不发生散水等不良水力现象的基础上,应将掺气挑坎尽量往上游布置,目的是增大保护范围,提高安全性能。When a bucket aerator is laid on an arch structure, serious spray may occur with high velocity, intense spray is negative to the discharging structure, which should be avoided. Based on the experiment, there is a relationship between the extent of the spray and the bucket aerator location on the arch structure, spray is weaker downstream than upstream, the reason is the boundary transition is smoother downstream than upstream. In practice, within the reasonable protective scope and without sprays and other bad flow pattern, the bucket aerator should be laid as upstream as possible to get wider protective scope and safer properties.

关 键 词：掺气挑坎 渥奇面 掺气减蚀 布设位置 

分 类 号：TV131.3[水利工程—水力学及河流动力学] TV651