Abstract
Jet noise remains an important source of aircraft noise, especially at take-off. The reduction of jet noise due to the application of serrated exit nozzles in aero-engines is one of the subjects under investigation within the German research project FREQUENZ. It can be shown that the generation of additional vorticity at the nozzle exit by modifications of the exit geometry, such as serrations, influences the radiated noise spectrum giving rise to a lower acoustic emission in certain frequency ranges. However, the mechanisms behind this phenomenon are not yet well understood. Numerical simulation of the flow field allows an in-depth analysis of the flow phenomena involved and the mechanisms of noise generation. In this work, simulation results for high subsonic coaxial jet flows are presented for a typical jet-engine exhaust. The geometry has been studied with a plane nozzle and with passive flow control (serrated) on the nozzle lip. They are investigated using far-field sound characteristics obtained by the Ffowcs-Williams-Hawkings acoustic analogy and compared to experimental measurements.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
P.R. Spalart, W.-H. Jou, M. Strelets, S.R. Allmaras, Comments on the feasibility of LES for wings, and on a hybrid RANS/LES approach, in First AFOSR International Conference on DNS/LES, Ruston, LA, August 4–8, 1997
P.R. Spalart, S.R. Allmaras, A one-equation turbulence model for aerodynamic flows. AIAA Paper 92-0439 (1992)
A. Travin, M. Shur, M. Strelets, P.R. Spalart, Physical and numerical upgrades in the detached-eddy simulation of complex turbulent flows. Fluid Mech. Appl. 65 (2002)
J. Yan, C. Mockett, F. Thiele, Investigation of alternative length scale substitutions in detached-eddy simulation. J. Flow Turbul. Combust. 74, 85–102 (2005)
J. Yan, L. Panek, F. Thiele, Simulation of jet noise from a long-cowl nozzle with serrations. AIAA Paper 2007-3635 (2007)
J. Yan, K. Tawackolian, U. Michel, F. Thiele, Computation of jet noise using a hybrid approach. AIAA Paper 2007-3621 (2007)
D. Eschricht, L. Panek, J. Yan, F. Thiele, M. Jacob, Noise prediction of a serrated nozzle using a hybrid approach, in Fourteenth International Congress on Sound and Vibration (ICSV14) (2007)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2009 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Panek, Ł., Yan, J., Eschricht, D., Thiele, F. (2009). Numerical Investigation of the Noise Emission from Serrated Nozzles in Coaxial Jets. In: Wagner, S., Steinmetz, M., Bode, A., Brehm, M. (eds) High Performance Computing in Science and Engineering, Garching/Munich 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69182-2_26
Download citation
DOI: https://doi.org/10.1007/978-3-540-69182-2_26
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-69181-5
Online ISBN: 978-3-540-69182-2
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)