Thermal Analysis And Control Of Monopropellant Catalytic Decomposition Hydrazine Engines

Thermal control of monopropellant catalytic decomposition hydrazine engines in important portion of space propulsive system. This paper deals with thermal analysis of monopropellant engine by Finite element method (FEM). Firstly, there is a full discuss of space aircraft thermal control .The background of the research for this paper is also presented here, in chapter 2, there is a complete discussing of FEM realization in numerical heat transfer, including Delaunay grids generation and display, two-dimension temperature field function eduction and collectivitycompound. Thermal contact resistance is calculated by FEM. The triangular model is considered more precise when its control angle equals 30 and an approximateFormula is provided for calculation of the thermal contact resistance by comparing computation models. The relationship between thermal contact resistance and surface roughness is discussed .The influence of outer space heat flow onspacecraft on the orbit is analyzed, and a balance temperature of spacecraft on the orbit is calculated. Finally, transient temperature distributing is simulated. Thermo-soakbackphenomena, electrical heating efficiency of catalyst bed and outer space radiationare analyzed.