Published 4 issues per year
ISSN Print: 2152-2057
ISSN Online: 2152-2073
Indexed in
A METHOD OF OPTIMUM ESTIMATION OF THE WEIGHT OF HEAT PROTECTION OF HYPERSONIC AIRCRAFT STRUCTURAL ELEMENTS
ABSTRACT
Determination of the weight (or thickness) of the heat protection of high-speed aircraft structural elements at the design stage has always been very urgent, since it defines an essential design parameter, i.e., the weight of the aircraft. Estimation of the thickness of the aircraft heat protection in correlation with the thermal and physical characteristics (TPCs) allows minimizing the thickness and, hence, the heat protection weight. In this work, the analytical solution of the heat conduction problem and the temperature restrictions for metal structure are used to develop methods for estimating the optimal thickness of the heat protective layers depending on the thermal conductivity, the final heating time and the ratio of the metal structure limiting temperature to the temperature on the outer boundary, and to build nomograms of the dependence of heat protection thickness on the above parameters. These nomograms can be used to determine the optimal heat protection thickness.