Fluid Acoustics

Julian Thünnesen, M. Sc.

Phone number: +49 9131 85-29509
Email: julian.thuennesen@fau.de

Acoustic Spectrum

The research group „Fluid acoustics“ mainly deals with flow induced noise. Main topics are:

Investigation and characterization of acoustic sources
Investigation oft he effect of mean flow on sound propagation
Development of measures for reducing or damping flow induced noise

Most oft he work is concerned with air at low Mach numbers (Ma < 0.3). Main focus is on applications involving turbomachinery. Industrial application areas include aerospace, automotive, rail vehicles and small scale turbomachinery.

Projects

No projects found.

Topics

Among the currently or recently studied topics there are:

Study of academic test cases
Design of turbo machines
Aeroacoustics of aerofoils
Aeroacoustic modeling using numerical methods
Thermodynamic techniques for noise reduction
Noise reduction and stealth technology from the animal kingdom

Methods

The research group employs experimental as well as numerical methods.

Publikationen

2019

Litfin O., Delgado A.:
Numerical investigation of trailing edge flow in centrifugal pump impellers
13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019 (Lausanne, 8. April 2019 - 12. April 2019)
In: 13th European Turbomachinery Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2019 2019
Litfin O., Delgado A.:
On the effect of trailing edge under-filing on the apparent slip factor of centrifugal impellers
ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019 (San Francisco, CA, 28. July 2019 - 1. August 2019)
In: ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019 2019
DOI: 10.1115/AJKFluids2019-5610
Ringelspacher Y., Litfin O., Delgado A.:
Einflussfaktoren bei der Abkühlung von Backwaren
27. GALA-Fachtagung "Experimentelle Strömungsmechanik" (Erlangen, 3. September 2019 - 5. September 2019)
In: A. Delgado, B. Gatternig, M. Münsch, B. Ruck, A. Leder (ed.): Proceedings der 27. GALA-Fachtagung "Experimentelle Strömungsmechanik" 2019

2018

Jang Z., Litfin O., Delgado A.:
A semi‐analytical approach for prediction of volume flow rate in nip‐fed reverse roll coating process
In: Proceedings in Applied Mathematics and Mechanics 18 (2018)
ISSN: 1617-7061
DOI: 10.1002/pamm.201800317

2017

Litfin O., Delgado A., Haddad K., Klein H.:
Numerical and experimental investigation of trailing edge modifications of centrifugal wastewater pump impellers
ASME 2017 Fluids Engineering Division Summer Meeting, FEDSM 2017 (Waikoloa/Hawaii, 30. July 2017 - 3. August 2017)
In: ASME 2017 Fluids Engineering Division Summer Meeting 2017
DOI: 10.1115/FEDSM2017-69123

2014

Litfin O., Delgado A.:
On the effect of volute design on unsteady flow and impeller-volute interaction in a centrifugal pump
In: American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, -: -, 2014, p. 1-12
ISBN: 978-0-7918-4622-3
DOI: 10.1115/FEDSM2014-21533
URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2086849

2012

Semel M., Epple P., Litfin O., Grashof B., Delgado A.:
Prediction of the flow characteristics of an axial fan at off design
Conference on Modelling Fluid Flow (CMFF 12) (Budapest, Ungarn)
In: Proceedings of the Conference on Modelling Fluid Flow 2012
Semel M., Smith H., Epple P., Litfin O., Delgado A., Pfannschmidt K., Grobeis D.:
System matched 3D radial impeller design with variable inlet angle distributions
Turbine Technical Conference & Exposition (ASME Turbo Expo) (Kopenhagen, Dänemark, 11. June 2012 - 15. June 2012)
In: Proceedings of ASME Turbo Expo 2012 2012
DOI: 10.1115/GT2012-70024
URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1694340

2011

Epple P., Semel M., Smith H., Litfin O., Delgado A.:
Radial impeller design optimization matched for high efficiency fans
ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 (Denver, USA, 11. November 2011 - 17. November 2011)
In: ASME 2011 International Mechanical Engineering Congress and Exposition (IMECE 2011) 2011
DOI: 10.1115/IMECE2011-65450
URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1644090
Litfin O., Mohr C., Haddad K., Epple P., Semel M., Becker K., Klein H., Delgado A.:
CFD computation, analysis and design of a two-bladed wastewater pump
ASME 2011 International Mechanical Engineering Congress and Exposition (IMECE 2011) (Denver, USA, 11. November 2011 - 17. November 2011)
In: ASME 2011 International Mechanical Engineering Congress and Exposition (IMECE 2011) 2011
DOI: 10.1115/IMECE2011-64195
URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1644076