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Thermophysics and Aeromechanics

2013 year, number 2

Aerothermodynamics calculation of thermal destruction of Fregat upper stage at descent in the Earths atmosphere

A.A. Glazunov1, V.D. Goldin1, V.G. Zverev1, S.N. Ustinov2, and V.S. Finchenko2
1SRI of Applied Mathematics and Mechanics of Tomsk State University, Tomsk, Russia
2Lavochkin Research and Production Association, Khimki, Moscow Region, Russia
E-mail: zverev@niipmm.tsu.ru
Keywords: upper stage Fregat, atmosphere of the Earth, the trajectory of descent, aerodynamic heating, fuel tanks, vapor pressure, stresses in the shells

Abstract

The engineering calculation method has been developed for investigation of the process of thermal destruction of Fregat upper stage at deorbiting and descent into the Earths atmosphere. The results of calculation of its descent trajectory and characteristics of aerodynamic heating are presented. Within the framework of the thermodynamic approach, the authors investigated the process of pressure increase in the tanks due to heating and evaporation of the liquid phase of fuel. Stresses in the shells, the height and the energy equivalent of explosive destruction of tanks were calculated depending on the degree of their filling with remains of the components of liquid fuel.