Gas transfer, cavitation, and bulking in self-aerated spillway flow
Gas transfer, cavitation, and bulking in self-aerated spillway flow
复制标题
DOI：
10.1080/00221680509500151
复制
发表时间：
2005-09
影响因子：
2.3
通讯作者：
S. Wilhelms;J. Gulliver;Joseph T. Ling;Rose S. Ling
中科院分区：
文献类型：
--
作者：
S. Wilhelms;J. Gulliver;Joseph T. Ling;Rose S. Ling
在一篇相关论文中，用两个概念描述了自由表面溢洪道水流中的掺气：“挟带空气”，即作为气泡被水流输送的空气；以及“截留空气”，即随着水流在水面的粗糙度或波浪中输送的空气。本文展示了这种对挟带和截留空气的“气泡和波浪”描述在溢洪道坡面任何位置的水流中的应用，用于：(a) 估算由于空气注入导致的水流体积膨胀，(b) 估算曝气足以消除空蚀破坏的位置，以及(c) 计算自曝气水流中的氧气吸收量。自曝气水流的气泡和波浪描述对于准确计算溢洪道表面的气体传递至关重要，并且能够为溢洪道的设计和管理提供适当的体积膨胀和空蚀计算。
Air entrainment in free-surface spillway flows has been described in a companion paper with two concepts: "entrained air," which is air being transported by the flow as bubbles; and "entrapped air," which is the air transported with the flow in the roughness or waves of the water surface. This paper shows the application of this "bubbles and waves" description of entrained and entrapped air for flow at any location along a spillway face to: (a) estimate the bulking of flow due to insufflation of air, (b) estimate the location where aeration is sufficient to eliminate cavitation damage, and (c) compute the oxygen absorption in self-aerated flow. The bubbles and waves description of self-aerated flow is essential to the accurate computation of gas transfer on a spillway surface, and can provide the appropriate bulking and cavitation computations for spillway design and management.