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Numerical Simulation of Nozzle Flow into High Vacuum Using Kinetic and Continuum Approaches

Grabe, Martin and Hannemann, Klaus and Fasoulas, Stefanos (2008) Numerical Simulation of Nozzle Flow into High Vacuum Using Kinetic and Continuum Approaches. 16. DGLR/STAB Symposium, 2008-11-3 - 2008-11-04, Aachen. (Submitted)

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Abstract

Laminar nitrogen flow expanding through a conical nozzle into high vacuum is numerically reproduced and compared to available experimental data. As the gas density varies quickly by several orders of magnitude, leading to high rarefaction and thermal non-equilibrium, standard (continuum) CFD tools are not sufficient to accurately model the expanding flow. In the work presented here, the efficiency of Navier-Stokes solvers is to be exploited where applicable, supplying the boundary conditions for a kinetic Direct Simulation Monte Carlo (DSMC) solver to handle the domain of rarefaction and non-equilibrium. The hypersonic character of the flow suggests to attempt a pure downstream coupling. The validity of this approach is to be verified.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Numerical Simulation of Nozzle Flow into High Vacuum Using Kinetic and Continuum Approaches
Authors:
AuthorsInstitution or Email of Authors
Grabe, MartinUNSPECIFIED
Hannemann, KlausUNSPECIFIED
Fasoulas, StefanosTU Dresden
Date:2008
Refereed publication:Yes
In ISI Web of Science:No
Status:Submitted
Keywords:Plume expansion, continuum break-down, DSMC
Event Title:16. DGLR/STAB Symposium
Event Location:Aachen
Event Type:national Conference
Event Dates:2008-11-3 - 2008-11-04
Organizer:DGLR
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 - numerische Verfahren (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Dagmar Brennecke-Hosseinzadeh
Deposited On:15 Jan 2009
Last Modified:27 Apr 2009 15:43

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