Assessment of Aerothermodynamic Analysis Methods with Regard to the Planned SHEFEX Flight Experiment
Noeding, P. and Bregman, E. and Longo, J.M.A.
Assessment of Aerothermodynamic Analysis Methods with Regard to the Planned SHEFEX Flight Experiment.
In: 4th International Symposium Atmospheric Reentry Vehicles & Systems Proceedings.
4th International Symposium Atmospheric Reentry Vehicles & Systems, [2005-03-21 - 2005-03-23], Arcachon, Frankreich.
Appraisal of aerothermodynamic analysis
results is not always easy, because reliable
wind tunnel results are often available for the
low speed regime only. Therefore, in many
cases theoretical analysis may be the only
method available in some hypersonic flight
Depending on the amount of experience with
similar configurations/hypersonic flight states,
or the lack of thereof, a careful selection of
appropriate safety factors for the calculated
heat loads (and other parameters) is
necessary. Obviously, the less sophisticated
the analysis method, the more a safety
margin has to be applied.
In order to improve the analysis tools, to
reduce the safety margins required and to
allow for a true optimization of hypersonic
flight vehicles and re-entry Systems further
empirical knowledge is desirable.
Increasing the existing experimental
aerothermodynamic database from freeflight
measurements on actual flight systems
remains therefore an important task.
The SHarp Edge Flight Experiment SHEFEX
initiated by the German aerospace research
center DLR will provide such an opportunity.
The launch of a two stage suborbital rocket
with the experimental vehicle mounted on top
is planned in the second half of 2005. The
system will reach an apogee of 327 km. The
SHEFEX system will then perform a reentry
to deliver aerothermodynamic data up to flight
Mach numbers between 7 and 8 at altitudes
between 90 and 20 km.
The paper describes preliminary
aerothermodynamic analyses performed at
EADS-ST in preparation of the planned
SHEFEX post flight assessment.
Simplified analysis tools (surface inclination
methods combined to boundary layer
analysis) as well as CFD-caIculations based
on structured and unstructured grids using
various turbulence models are considered.
First conclusions can be drawn from results
using different analysis tools regarding
aerothermodynamic parameters such as
calculated heat flux densities, surface
temperatures and pressure distributions.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Assessment of Aerothermodynamic Analysis Methods with Regard to the Planned SHEFEX Flight Experiment|
|Authors||Institution or Email of Authors|
|Noeding, P.||EADS Space Transportation|
|Bregman, E.||EADS Space Transportation|
|Date:||20 February 2005|
|Journal or Publication Title:||4th International Symposium Atmospheric Reentry Vehicles & Systems Proceedings|
|In ISI Web of Science:||No|
|Keywords:||Aerothermodynamics, SHEFEX, Numerical Methods, CFD, Heat Fluxes|
|Event Title:||4th International Symposium Atmospheric Reentry Vehicles & Systems|
|Event Location:||Arcachon, Frankreich|
|Event Type:||international Conference|
|Event Dates:||[2005-03-21 - 2005-03-23]|
|Organizer:||AAAF (Association Aéronautique et Astronautique de France)|
|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)|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology|
Dr.-Ing. Jose Maria Longo
|Deposited On:||23 Jan 2006|
|Last Modified:||12 Dec 2013 20:09|
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