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DLR TAU Simulations for the Second AIAA Sonic Boom Prediction Workshop

Kirz, Jochen and Rudnik, Ralf (2018) DLR TAU Simulations for the Second AIAA Sonic Boom Prediction Workshop. Journal of Aircraft. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C034819 ISSN 0021-8669

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Official URL: https://doi.org/10.2514/1.C034819

Abstract

The accurate prediction of the sonic boom is essential for the development of a future low boom supersonic aircraft. In this paper geometries and grids provided by the Second AIAA Sonic Boom Prediction Workshop are used to improve a best practice for predicting near field pressure signatures with the DLR TAU code. The workshop provided low boom geometries with different complexities, such as an axisymmetric body, a delta-wing body and a full aircraft configuration with a cruciform tail and an engine. Results for the DLR TAU simulations on the workshop-provided grids are presented for different grid refinement levels using both, Euler and RANS simulations. In addition to the provided grids, mixed-element grids with varying setups are generated. The positions of the shocks and expansions are widely identical for all medium to fine grids but vary for very coarse grids due to the surface triangulation. The pressure magnitude at shocks and expansions is higher for simulations on fine grids compared to coarse grids. It is shown that the influence of the viscosity on the pressure signatures is more significant than the influence of the grid resolution. The agreement between TAU solutions and other participants' solutions is good.

Item URL in elib:https://elib.dlr.de/124576/
Document Type:Article
Title:DLR TAU Simulations for the Second AIAA Sonic Boom Prediction Workshop
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kirz, JochenJochen.Kirz (at) dlr.deUNSPECIFIED
Rudnik, Ralfralf.rudnik (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.C034819
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:Sonic Boom Workshop, near-field pressure signature, TAU, Euler, RANS, grid generation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Concepts and Integration, L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Kirz, Jochen
Deposited On:13 Dec 2018 14:40
Last Modified:13 Dec 2018 14:40

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