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Simulation of the sound radiation of turbulent flows with DES

Michel, Ulf and Eschricht, Dandy and Greschner, Björn and Knacke, Thilo and Mockett, Charles and Thiele, Frank and Yan, Jianping (2007) Simulation of the sound radiation of turbulent flows with DES. In: West-East High Speed Flow Field Conference, 19-22 November 2007, Moscow, Russia. West-East High Speed Flow Field Conference, 19-22 November 2007,, 2007-11-19 - 2007-11-22, Moscow, Russia.

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Abstract

Detached eddy simulation (DES) is a suitable method for the simulation of the sound radiation of turbulent flows, providing access to resolved turbulent scales at minimal computational cost. The near-wall region is solved efficiently by RANS while LES is applied to detached regions of large scale turbulence. The various DES implementations of the Institute of Fluid Mechanics and Engineering Acoustics (ISTA) at the TU-Berlin are described. Simplified academic flow cases are used for the validation of the method and the suitability of the method for complex industrial flow applications is also demonstrated. The method proves robust and reliable for a wide range of applications, ranging from external to internal flows, from bluff bodies with massive separation to the partial resolution of attached boundary layers. Examples of applications to noise emission problems are presented for (i) slat noise, (ii) interaction noise, (iii) jet mixing noise, and (iv) trailing-edge noise. The jet noise predictions include a study on the influence of serrations on the noise emission. The overall sound pressure levels as well as the noise reducing effect of the serrations are well predicted. With respect to the prediction of flow noise, further work is required to improve the predictive capabilities for higher frequencies.

Document Type:Conference or Workshop Item (Paper)
Title:Simulation of the sound radiation of turbulent flows with DES
Authors:
AuthorsInstitution or Email of Authors
Michel, UlfUNSPECIFIED
Eschricht, DandyTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Greschner, BjörnTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Knacke, ThiloTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Mockett, CharlesTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Thiele, FrankTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Yan, JianpingTU Berlin, Institut für Strömungsmechanik und Technische Akustik, Müller-Breslau-Str. 11, 10623 Berlin
Date:22 November 2007
Journal or Publication Title:West-East High Speed Flow Field Conference, 19-22 November 2007, Moscow, Russia
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:noise emission, numerical simulation, detached eddy simulation, DES, computational fluid dynamics, CFD, computational aeroacoustics, CAA, jet mixing noise, airframe noise, slat noise, trailing edge noise, interaction noise.
Event Title:West-East High Speed Flow Field Conference, 19-22 November 2007,
Event Location:Moscow, Russia
Event Type:international Conference
Event Dates:2007-11-19 - 2007-11-22
Organizer:Russian Academy of Science (RAS) and Institute for Mathematical Modelling (IMM) and Central Aerohydrodynamic Institute (TsAGI)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Prof. Dr.-Ing. Ulf Michel
Deposited On:03 Aug 2011 10:04
Last Modified:03 Aug 2011 10:04

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