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Simulation of Streamwise Vortices at the Flaps of Re-entry Vehicles

Lüdeke, H. and Radespiel, R. and Schülein, E. (2004) Simulation of Streamwise Vortices at the Flaps of Re-entry Vehicles. In: CD. 42nd AIAA Aerospace Science Meeting and Exhibit, Reno (usa), 05.-08.01.2004.

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Abstract

Purpose of the present investigation is the numerical investigation of separated flow in the flap region of the X-38 re-entry demonstrator, with respect to the heat loads downstream reattachment induced by streamwise vortices. As a first step generic turbulent ramp configurations with artificially induced vortex disturbances have been simulated by the Navier-Stokes solver CEVCATS-N and compared with wind tunnel data of the Ludwieg tube facility in Göttingen (RWG). The results allow a deeper insight into the perturbed flow field, the associated flow topology and the influence of different parameter variations for the perturbations. For the resolution of streamwise vortices in the boundary layer of the control surfaces of re-entry vehicles local grids have been generated at the flaps of the X-38. Extensive studies of the grid influence on the wake and on further distant flow as well as grid refinement in different directions have shown a very good grid convergence. Streamwise vortices are simulated on spanwise refined grids with a highly resolved boundary layer. For laminar cases and cases with fixed transition vortex influences are simulated successfully with and without artificial vortex excitation.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Simulation of Streamwise Vortices at the Flaps of Re-entry Vehicles
Authors:
AuthorsInstitution or Email of Authors
Lüdeke, H.UNSPECIFIED
Radespiel, R.TU Braunschweig
Schülein, E.UNSPECIFIED
Date:2004
Journal or Publication Title:CD
Status:Published
Keywords:Görtler vortices, hypersonic flow, re-entry vehicles, turbulent separation
Event Title:42nd AIAA Aerospace Science Meeting and Exhibit, Reno (usa), 05.-08.01.2004
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Grundlagen Raumtransport - Anlagen und Messtechnik (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:48

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