TY - JOUR
T1 - On the variation of the acoustic intensity vector near an open end of a pipe
AU - Horoshenkov, Kirill V.
AU - Prisutova, Jevgenija
AU - Kirby, Ray
AU - Duan, Wenbo
PY - 2011/12/1
Y1 - 2011/12/1
N2 - A new laboratory facility for studying of the acoustic intensity field in a round 6m long, 150mm diameter pipe has been developed. It enables to control carefully the boundary conditions at the both ends, positions and the orientation of the acoustics sensors. It has been used to measure the variation of the acoustic intensity near the open end of the pipe with a triaxial intensity probe supplied by Microflown. The measured data have been used to validate a new efficient model based on the normal model decomposition and finite element methods. It is shown that even in the plane wave regime the acoustic intensity distribution near the pipe end is very complex and that the measured intensity vector sensitive to the radial and longitudinal position of the probe. It is demonstrated that a very small variation in the position of the intensity probe can result in a very large change in the intensity vector that is difficult to predict. The results of this work have a strong implication on the design of acoustic intensity sensors that have been developed to characterise the boundary conditions in a pipe.
AB - A new laboratory facility for studying of the acoustic intensity field in a round 6m long, 150mm diameter pipe has been developed. It enables to control carefully the boundary conditions at the both ends, positions and the orientation of the acoustics sensors. It has been used to measure the variation of the acoustic intensity near the open end of the pipe with a triaxial intensity probe supplied by Microflown. The measured data have been used to validate a new efficient model based on the normal model decomposition and finite element methods. It is shown that even in the plane wave regime the acoustic intensity distribution near the pipe end is very complex and that the measured intensity vector sensitive to the radial and longitudinal position of the probe. It is demonstrated that a very small variation in the position of the intensity probe can result in a very large change in the intensity vector that is difficult to predict. The results of this work have a strong implication on the design of acoustic intensity sensors that have been developed to characterise the boundary conditions in a pipe.
UR - http://www.scopus.com/inward/record.url?scp=84866053192&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:84866053192
SP - 1007
EP - 1011
JO - Proceedings of Forum Acusticum
JF - Proceedings of Forum Acusticum
SN - 2221-3767
T2 - 6th Forum Acusticum 2011
Y2 - 27 June 2011 through 1 July 2011
ER -