Implementering av akustiska analogier i Openfoam och CALFEM/Matlab
(2010) In TVBA VTA820 20101Engineering Physics (M.Sc.Eng.)
Engineering Acoustics
- Abstract
- Aeroacoustics is the field that studies flow induced sound. The source of sound can for example be fans, duct flows, aircraft propellers and objects mounted on the outside of a vehicle. The most often used computational methods for aeroacoustics are based on acoustical analogies.
The software package CALFEM is a finite element toolbox developed for teaching at Lund University. It contains routines to solve acoustical problems. OpenFOAM is an open source CFD code. In this master thesis it is investigated how a method using the acoustical analogies can be implemented with OpenFOAM and CALFEM.
The method was implemented as follows. First, an incompressible flow carried out using OpenFOAM which provides the acoustic sources. Then the source... (More) - Aeroacoustics is the field that studies flow induced sound. The source of sound can for example be fans, duct flows, aircraft propellers and objects mounted on the outside of a vehicle. The most often used computational methods for aeroacoustics are based on acoustical analogies.
The software package CALFEM is a finite element toolbox developed for teaching at Lund University. It contains routines to solve acoustical problems. OpenFOAM is an open source CFD code. In this master thesis it is investigated how a method using the acoustical analogies can be implemented with OpenFOAM and CALFEM.
The method was implemented as follows. First, an incompressible flow carried out using OpenFOAM which provides the acoustic sources. Then the source terms are interpolated and converted for use in CALFEM. This was done by adding code to OpenFOAM, writing conversion programs and writing a CALFEM case.
Finally the implemented method was tested on an open cavity. Since it was difficult to find relevant experimental measurements, the method could not be properly validated yet. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/3806156
- author
- Nilsson, Johan LU
- supervisor
- organization
- course
- VTA820 20101
- year
- 2010
- type
- H3 - Professional qualifications (4 Years - )
- subject
- publication/series
- TVBA
- report number
- TVBA-5040
- ISSN
- 0281-8477
- language
- Swedish
- id
- 3806156
- date added to LUP
- 2013-08-01 14:03:12
- date last changed
- 2013-10-03 17:37:47
@misc{3806156, abstract = {{Aeroacoustics is the field that studies flow induced sound. The source of sound can for example be fans, duct flows, aircraft propellers and objects mounted on the outside of a vehicle. The most often used computational methods for aeroacoustics are based on acoustical analogies. The software package CALFEM is a finite element toolbox developed for teaching at Lund University. It contains routines to solve acoustical problems. OpenFOAM is an open source CFD code. In this master thesis it is investigated how a method using the acoustical analogies can be implemented with OpenFOAM and CALFEM. The method was implemented as follows. First, an incompressible flow carried out using OpenFOAM which provides the acoustic sources. Then the source terms are interpolated and converted for use in CALFEM. This was done by adding code to OpenFOAM, writing conversion programs and writing a CALFEM case. Finally the implemented method was tested on an open cavity. Since it was difficult to find relevant experimental measurements, the method could not be properly validated yet.}}, author = {{Nilsson, Johan}}, issn = {{0281-8477}}, language = {{swe}}, note = {{Student Paper}}, series = {{TVBA}}, title = {{Implementering av akustiska analogier i Openfoam och CALFEM/Matlab}}, year = {{2010}}, }