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Time-Accurate Euler Computations for Rotor Flows
Pahlke, K. and Blazek, J. and Kirchner, A. (1993) Time-Accurate Euler Computations for Rotor Flows. In: Proc. 1993 European Forum, Recent Developments and Applications in Aeronautical CFD, 1.-3.9.1993, Bristol, UK..
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Abstract
Two time accurate schemes for the solution of Euler equations are presented: an explicit residual averaging and an implicit LU-SSOR scheme with inner iterations. The right hand side of the LU-SSOR scheme employs the same spatial discretization as the explicit scheme. Both codes are used to compute the flow around a NACA 0012 airfoil oscillating about its quarter point. The same set of grids is used and the results are compared. A 2D and a 3D version of the explicit Runge-Kutta code are applied to calculate the flow past a rotor in non-lifting and lifting forward flight. The Runge-Kutta and the LU-SSOR scheme produced 2D solutions of the same accuracy, provided the LU-SSOR scheme was run with a sufficient number of inner iterations. In all the cases the LU-SSOR scheme required the shortest CPU-time. The comparison of 2D and 3D computations for rotor flows showed that only 3D methods can accurately predict the quantitative.
| Document Type: | Conference or Workshop Item (Paper) | ||||||||
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| Additional Information: | institution=Royal Aeronautical Society, LIDO-Berichtsjahr=1996, pages=14, | ||||||||
| Title: | Time-Accurate Euler Computations for Rotor Flows | ||||||||
| Authors: |
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| Date: | 1993 | ||||||||
| Journal or Publication Title: | Proc. 1993 European Forum, Recent Developments and Applications in Aeronautical CFD, 1.-3.9.1993, Bristol, UK. | ||||||||
| Status: | Published | ||||||||
| Keywords: | Instationäre Strömungen, Rotorenströmungen, Rotor im Vorwärtsflug mit Auftrieb, Euler-Gleichungen, LU-Schema, impliziertes Schema..... | ||||||||
| HGF - Research field: | UNSPECIFIED | ||||||||
| HGF - Program: | Aeronautics | ||||||||
| HGF - Program Themes: | L - no assignement | ||||||||
| DLR - Research area: | UNSPECIFIED | ||||||||
| DLR - Program: | L DT - Drehflüglertechnologien | ||||||||
| DLR - Research theme (Project): | L - The Quiet and Comfortable Rotorcraft | ||||||||
| Location: | Köln-Porz , Braunschweig , Göttingen | ||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik | ||||||||
| Deposited By: | elib DLR-Beauftragter | ||||||||
| Deposited On: | 03 Apr 2006 | ||||||||
| Last Modified: | 27 Apr 2009 10:06 |
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