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203 results on '"Ballmann, Josef"'

1. Numerical Prediction and Post-Test Numerical Analysis of the ASDMAD Wind Tunnel Tests in ETW

Author

Brüderlin, Manuel, Hosters, Norbert, Chen, Bae-Hong, Boucke, Alexander, Ballmann, Josef, and Behr, Marek

Subjects
Physics - Fluid Dynamics, Mathematics - Numerical Analysis
Abstract

This paper presents numerical results in comparison with experimental data of nominally static aeroelastic polars of the second ASDMAD (Aero-Structural Dynamics Methods for Airplane Design) campaign conducted in the European Transonic Windtunnel. For the simulation the modular solver package SOFIA combined with the DLR solver TAU on the fluid side and the in-house solver FEAFA on the structural side is applied. First the experimental setup and the aeroelastic solver are introduced, followed by a detailed analysis of the results. Comparisons of pressure distributions and the global lift coefficients are presented for variations of angle of attack, Mach number and aerodynamic loading factor. Additionally, the paper contains preliminary investigations of dynamic results for excited vibration applying periodical inner force couples in the wing root area., Comment: 17 pages, 11 figures, IFASD 2013

Published
2022

2. On Well-Posedness and Modelling for Nonlinear Aeroelasticity

Author

Massjung, Ralf, Hurka, Jörg, Dahmen, Wolfgang, Ballmann, Josef, Hirschel, E. H., editor, Fujii, K., editor, Haase, W., editor, van Leer, B., editor, Leschziner, M. A., editor, Pandolfi, M., editor, Periaux, J., editor, Rizzi, A., editor, Roux, B., editor, and Ballmann, Josef, editor

Published
2003
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5. Development of a Modular Method for Computational Aero-structural Analysis of Aircraft

Author

Reimer, Lars, Braun, Carsten, Wellmer, Georg, Behr, Marek, Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, and Shokin, Yurii I., editor

Published
2010
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6. Parallel and Adaptive Methods for Fluid-Structure-Interactions

Author

Ballmann, Josef, Behr, Marek, Brix, Kolja, Dahmen, Wolfgang, Hohn, Christoph, Massjung, Ralf, Melian, Sorana, Müller, Siegfried, Schieffer, Gero, Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, and Shokin, Yurii I., editor

Published
2010
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7. An Adaptive Implicit Finite Volume Scheme for Compressible Turbulent Flows about Elastic Configurations

Author

Schieffer, Gero, Ray, Saurya, Bramkamp, Frank Dieter, Behr, Marek, Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, and Shokin, Yurii I., editor

Published
2010
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8. Aero-structural Dynamics Experiments at High Reynolds Numbers

Author

Ballmann, Josef, Dafnis, Athanasios, Baars, Arndt, Boucke, Alexander, Brakhage, Karl-Heinz, Braun, Carsten, Buxel, Christian, Chen, Bae-Hong, Dickopp, Christian, Kämpchen, Manuel, Korsch, Helge, Olivier, Herbert, Ray, Saurya, Reimer, Lars, Reimerdes, Hans-Günther, Hirschel, Ernst Heinrich, editor, Schröder, Wolfgang, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, and Shokin, Yurii I., editor

Published
2010
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12. Introduction

Author

Ballmann, Josef, Hirschel, E. H., editor, Fujii, K., editor, Haase, W., editor, van Leer, B., editor, Leschziner, M. A., editor, Pandolfi, M., editor, Periaux, J., editor, Rizzi, A., editor, Roux, B., editor, and Ballmann, Josef, editor

Published
2003
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15. DNS of Transonic Flow about an Oscillating Airfoil

Author

Klutchnikov, Igor, Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Breitsamter, Christian, editor, Laschka, Boris, editor, Heinemann, Hans-Joachim, editor, and Hilbig, Reinhard, editor

Published
2004
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16. Numerical Simulation of Turbulent Flows Inside a Hypersonic Inlet

Author

Reinartz, Birgit U., Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Breitsamter, Christian, editor, Laschka, Boris, editor, Heinemann, Hans-Joachim, editor, and Hilbig, Reinhard, editor

Published
2004
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17. Shock-Vortex Interaction in a Transonic Turbocompressor

Author

Hofmann, Willy H., Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jacques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Breitsamter, Christian, editor, Laschka, Boris, editor, Heinemann, Hans-Joachim, editor, and Hilbig, Reinhard, editor

Published
2004
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20. Tip-Vortices in Transonic Axial-Compressors

Author

Hofmann, Willy, Ballmann, Josef, Hirschel, Ernst Heinrich, editor, Fujii, Kozo, editor, Haase, Werner, editor, van Leer, Bram, editor, Leschziner, Michael A., editor, Pandolfi, Maurizio, editor, Periaux, Jaques, editor, Rizzi, Arthur, editor, Roux, Bernard, editor, Wagner, Siegfried, editor, Rist, Ulrich, editor, Heinemann, Hans-Joachim, editor, and Hilbig, Reinhard, editor

Published
2002
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27. Performance of upwind schemes and turbulence models in hypersonic flows

Author

Coratekin, Turan, van Keuk, Jorn, and Ballmann, Josef

Subjects
Aerospace engineering -- Research, Aerospace and defense industries, Business
Abstract

An evaluation of three upwind schemes and four turbulence models is presented in order to assess their respective separate and combined performance in complex hypersonic flows with large scale separation. The upwind schemes include Liou and Steffen's advection upstream splitting method (AUSM) flux-vector splitting, its modification by Wada and Liou, called AUSMDV, and Roe's flux-difference splitting. Turbulent effects were modeled utilizing Wilcox's k--[omega] model with two compressibility corrections by Coakley's group, the widely popular Spalart--Allmaras and supersonic transport (SST) models as well as an explicit algebraic Reynolds stress model (EARSM) by Wallin and Johansson. Using a powerful explicit/implicit finite volume computational-fluid-dynamics code, the upwind schemes are first tested on a complex double-wedge Euler flow configuration. A three-dimensional corner flow serves as a test case for a laminar Navier-Stokes computation. Finally, AUSM schemes are used in combination with several turbulence models in a two-dimensional ramp flow and a three-dimensional crossing-shock interaction. Results are compared with either experiments or computations by other authors. The authors' conclusions suggest that the AUSMDV is probably the most recommendable scheme for complex hypersonic flows. Regarding turbulence modeling, models with explicit compressibility corrections, in this case the k--[omega] model, seem to deliver presently the comparatively best predictions in complex flows, particularly in case of separation.

Published
2004

28. Plans for Aeroelastic Prediction Workshop

Author

Heeg, Jennifer, Ballmann, Josef, Bhatia, Kumar, Blades, Eric, Boucke, Alexander, Chwalowski, Pawel, Dietz, Guido, Dowell, Earl, Florance, Jennifer P, Hansen, Thorsten, Mani, Mori, Marvriplis, Dimitri, Perry, Boyd, III, Ritter, Markus, Schuster, David M, Smith, Marilyn, Taylor, Paul, Whiting, Brent, and Wieseman, Carol C

Subjects
Aerodynamics
Abstract

This paper summarizes the plans for the first Aeroelastic Prediction Workshop. The workshop is designed to assess the state of the art of computational methods for predicting unsteady flow fields and aeroelastic response. The goals are to provide an impartial forum to evaluate the effectiveness of existing computer codes and modeling techniques, and to identify computational and experimental areas needing additional research and development. Three subject configurations have been chosen from existing wind tunnel data sets where there is pertinent experimental data available for comparison. For each case chosen, the wind tunnel testing was conducted using forced oscillation of the model at specified frequencies

Published
2011

29. Propulsion

Author

Heinz, Stefan, primary, Friedrich, Rainer, additional, Lyubar, Anatoliy, additional, Sander, Tobias, additional, Sattelmayer, Thomas, additional, Rocci-Denis, Sara, additional, Brandstetter, Armin, additional, Rist, Dieter, additional, Kau, Hans-Peter, additional, Rick, Hans, additional, Bauer, Andreas, additional, Esch, Thomas, additional, Hollmeier, Sebastian, additional, Kopp, Sven, additional, Kreiner, Andreas, additional, Gaisbauer, Uwe, additional, Knauss, Helmut, additional, Wagner, Siegfried, additional, Gerlinger, Peter, additional, Kasal, Peter, additional, Schneider, Fernando, additional, von Wolfersdorf, Jens, additional, Weigang, Bernhard, additional, Aigner, Manfred, additional, Henckels, Andreas, additional, Gruhn, Patrick, additional, Reinartz, Birgit Ursula, additional, van Keuk, Joern, additional, Ballmann, Josef, additional, Herrmann, Carsten, additional, and Koschel, Wolfgang, additional

Published
2005
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33. Verbundprojekt MUNA: Best-Practice-Regeln

Author

Albensoeder, Stefan, Ballmann, Josef, Barnewitz, Holger, Behr, Marek, Bogdanski, Steffen, Filimon, Alexander, Fritz, Willy, Gauger, Nicolas, Haupt, Matthias, Henes, Daniel, Horst, Peter, Litvinenko, Alexander, Lutz, Thorsten, Matthies, Hermann G., Mazlum, Ekrem, Meinke, Matthias, Mockett, Charles, Munz, Claus-Dieter, Orlt, Matthias, Radespiel, Rolf, Reich, Paul, Reimer, Lars, Rieger, Herbert, Roidl, Benedikt, Schillings, Claudia, Schmidt, Tobias, Schröder, Wolfgang, Schulz, Volker, Thiele, Frank, Wellmer, Georg, and Wolf, Alexander

Subjects
Best-Practice, Numerische Simulation, Unsicherheiten, Aerodynamik
Published
2010

34. Numerical simulation of cavitation bubbles by compressible two-phase fluids

Author

Müller, Siegfried, Helluy, Philippe, Ballmann, Josef, Helluy, Philippe, Institut für Geometrie und Praktische Mathematik [RWTH Aachen] (IGPM), Rheinisch-Westfälische Technische Hochschule Aachen, Institut de Recherche Mathématique Avancée (IRMA), and Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS)

Subjects
[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], [MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP]
Abstract

internal report of RWTHA/Institut für Geometrie und Praktische Mathematik; We investigate numerically the collapse of a cavitation bubble. The stiffened gas EOS is used for both the gas and the liquid. For the discretization, we use the non-conservative Abgrall-Saurel approach together with a second order extension. The efficiency of the numerical scheme is significantly improved by employing local grid adaptation and wavelet compression.

Published
2007

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