Paper aims to present problem of aerodynamic heating of a metallic heat shield. The key elements of this construction are metallic layers of superalloy honeycomb, which…
Abstract
Purpose
Paper aims to present problem of aerodynamic heating of a metallic heat shield. The key elements of this construction are metallic layers of superalloy honeycomb, which significantly increase the structure’s resistance to impact. Paper describes the problem of influence of damage size on increase of thermal load.
Design/methodology/approach
Numerical analysis was performed in a non-commercial environment FreeFem++ using finite element method, and its results were compared with the results given in the literature.
Findings
In thermal protection system, a modification was used to delay increase in temperature on the underlying structure as well as to reduce its maximum value.
Originality/value
In the further part of the paper, selected insulation material was modified by adding additional conductive material.
Details
Keywords
Łukasz Brodzik and Andrzej Frąckowiak
This paper aims to present the problem of heating the damaged insulation of an orbiter.
Abstract
Purpose
This paper aims to present the problem of heating the damaged insulation of an orbiter.
Design/methodology/approach
Changes of the insulation’s thermal properties, made by adding conductive material of high value of specific heat in a form of a dope to the protective layer, were examined. An iterative algorithm determining a variable of dope concentration in the material was developed.
Findings
Determination of distribution of conductive material concentration was made for materials which, after verification, demonstrated the most beneficial effect on protective properties of the modified insulation layer. The problem of determining the distribution of metal filings concentration in the insulation layer of the coating belongs to inverse heat conduction problems.
Originality/value
Change of properties was to enable time extension of the LI900 insulation tile heating up to the maximal temperature and, additionally, to lowering this temperature.