Numerical investigation on bottom shear stress induced by flushing gate for sewer cleaning-Reference-Cited by-同舟云学术

Numerical investigation on bottom shear stress induced by flushing gate for sewer cleaning

Published:2019-07-15 Issue:2 Volume:80 Page:290-299
ISSN:0273-1223
Container-title:Water Science and Technology
language:en
Short-container-title:

Author:

Yang Haoming¹,Zhu David Z.²³,Zhang Yiping³,Zhou Yongchao³

Affiliation:

1. Department of Water and Environmental Engineering, Hydro China Huadong Engineering Corporation, Hangzhou 311122, China

2. Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada, T6G 2W2

3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China

Abstract

Abstract One of the most common strategies for sewer cleaning is to generate flushing flows using flushing gates to store water in the upstream sewer pipe. Therefore it is important to obtain the flow information on the flushing waves and their eroding effects. In this study, the flow characteristics of the flushing wave and the flushing effect were investigated by a transient flow calculation using a commercial computational fluid dynamics (CFD) code. The values of bottom shear stress were obtained and the effect of several factors are discussed. The water depth and the slope were related to the release rate of the storage volume, while the flushing volume determined the flushing distance at long sewer distances. The initial downstream water level was found to dramatically reduce the flushing effect. Equations based on the storage depth were developed to estimate the flushing effect, and suggestions for the installation and operation of flushing gates are provided.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

Link

http://iwaponline.com/wst/article-pdf/80/2/290/621081/wst080020290.pdf

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