Title
Acoustical damping in a circular pipe with an air-water mixture flow: A new setup design
Author
Sanna, F.
Golliard, J.
Belfroid, S.P.C.
Publication year
2016
Abstract
Damping in pipes quantifies the attenuation of the pressure amplitude due to losses. Applications with mixtures of two immiscible phases are common but limited studies on damping with multiphase flows in pipes are available. The purpose of this work is to describe the setup as well as the post-processing used to quantify the acoustical damping in presence of a mixture of air and water at different conditions. In particular for the boundary conditions, a new solution is proposed both to be able to drive water in the system and to satisfy the requirement of anechoicity. Thus, damping has been successfully measured with and without gas mean flow, in presence of liquid or not. For the case without water, the model of Kirchhoff and the correction proposed by Dokumaci describe the visco-thermal losses and the convection effects. Analogously, to quantify the acoustic damping when quiescent liquid is laying at the bottom of the main pipe (without gas mean flow), it has been verified that the change of the hydraulic diameter due to the presence of water is the responsible of the increase.
Subject
Fluid & Solid Mechanics
HTFD - Heat Transfer & Fluid Dynamics
TS - Technical Sciences
Mechanics
Industrial Innovation
To reference this document use:
http://resolver.tudelft.nl/uuid:b51a7ab3-3c5a-43f5-a90d-76c30a061fb2
TNO identifier
574347
Publisher
TNO
Source
11th International Conference on Flow-Induced Vibration, 4-6 July 2016, Delft, The Netherlands
Document type
conference paper