PRESSURE FLUCTUATIONS BENEATH SPATIAL HYDRAULIC JUMPS

This article deals with statistical analysis of pressure fluctuations at the bottom of spatial hydraulic jumps with abrupt lateral expansions. The effects of the channel expansion ratio and inflow condition on the power spectral and dominant frequency were examined. Pressure data were recorded for d...

Full description

Saved in:
Bibliographic Details
Published in:Journal of Hydrodynamics 2006-12, Vol.18 (6), p.723-726
Main Authors: Yan, Zhong-min, Zhou, Chun-tian, Lu, Shi-qiang
Format: Article
Language:English
Subjects:
压力波动
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article deals with statistical analysis of pressure fluctuations at the bottom of spatial hydraulic jumps with abrupt lateral expansions. The effects of the channel expansion ratio and inflow condition on the power spectral and dominant frequency were examined. Pressure data were recorded for different Froude numbers ranging from 3.52 to 6.86 and channel expansion ratios ranging from 1.5 to 3.0. A sampling frequency of 100 Hz was selected. The measurements were conducted in the bed of a glass-walled laboratory flume by means of pressure transducers and data acquisition systems. Power spectra as well as dominant frequency and some other statistical characteristics of fluctuating pressure beneath hydraulic jumps were obtained. Test results were compared with those of classical jump, which indicates that the peak frequencies and intensity coefficients of pressure fluctuations are higher than those of the corresponding classical jumps.
ISSN:1001-6058
1878-0342
1000-4874
DOI:10.1016/S1001-6058(07)60012-2