Title:
Integrating Aeroheating and TPS into Conceptual RLV Design
Integrating Aeroheating and TPS into Conceptual RLV Design
Author(s)
Cowart, Karl K.
Olds, John R.
Olds, John R.
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Abstract
The purpose of this study is to develop the
Thermal Calculation Analysis Tool (TCAT) that will
enable Aeroheating and Thermal Protection System
(TPS) sizing to be, an on-line, automated process. This
process is described as dynamic on-line TPS sizing. It
enables the assumptions made about the vehicle TPS
to be updated through out the iteration-process. This
method is faster and more accurate than a static offline
process where the assumptions of the vehicle TPS
are held constant during the vehicle design procedure.
TCAT will work in conjunction with other engineering
disciplines in a Design Structure Matrix (DSM). The
unsteady, one dimensional heat diffusion equation was
discretized, and resulted in a tridiagonal system of
non-linear algebraic equations. This system was
implicitly solved using the iterative Newton-Raphson
technique at each time level. This technique was
conducted for both steady-state and transient
conditions that predicted the temperature profiles, and
in-depth conduction histories for several TPS material
test cases. Also, this was performed on several
disparate TPS materials layered together at one time.
Finally; comparative benchmark solutions of the
TCAT transient analyses were conducted using the
commercial software code SINDA/G. Results show
that TCAT performed as predicted, and will satisfy the
requirement of lowering the amount of time required
to conduct TPS sizing for a reusable launch vehicle.
Future work will consist of adding temperature
dependent material properties to TCAT, coupling
TCAT to an optimizer, and creating a web-interface
that will enable cross-platform operation of TCAT.
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Date Issued
1999-11
Extent
694079 bytes
Resource Type
Text
Resource Subtype
Paper