Skip navigation

Dynamically rough boundary scattering effect on a propagating continuous acoustical wave in a circular pipe with flow

Dynamically rough boundary scattering effect on a propagating continuous acoustical wave in a circular pipe with flow

Romanova, Anna V., Horoshenkov, Kirill V. and Krynkin, Anton (2018) Dynamically rough boundary scattering effect on a propagating continuous acoustical wave in a circular pipe with flow. Sensors, 18:1098. ISSN 1424-8220 (Online) (doi:https://doi.org/10.3390/s18041098)

[img]
Preview
PDF (Publisher's PDF - Open Access)
19909 ROMANOVA_Dynamically_Rough_Boundary_Scattering_Effect_(OA)_2018.pdf - Published Version
Available under License Creative Commons Attribution.

Download (14MB) | Preview

Abstract

The pattern of the free surface of the turbulent flow in a partially filled circular pipe contains information on the underlying hydraulic processes. However, the roughness of the free surface of flow and its temporal variation in a pipe is a dynamic and non-stationary process that is difficult to measure directly. This work examines a new acoustic method that is used to study the characteristics of the free surface roughness under controlled laboratory conditions. The acoustic method makes use of a continuous sine wave that is transmitted through the air above the turbulent flow of water over a section of the pipe instrumented with an array of wave probes and microphones. The results obtained for a representative range of flow regimes and variety of pipe bed conditions illustrate that it is possible to unambiguously relate variations in the recorded acoustic field to the standard deviation in the free surface roughness and mean flow depth. These variations are clearly linked to the hydraulic friction factor of the pipe, which is shown to be related to airborne acoustic data obtained non-invasively.

Item Type: Article
Additional Information: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords: boundary scattering; dynamic roughness; sine wave; pipe flow; pipe acoustics
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Applied Engineering & Management
Faculty of Engineering & Science > Designing for Sustainability Research Theme
Last Modified: 30 May 2018 16:36
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: GREAT c
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/19909

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics