THERMAL DESIGN OF THE GALILEO BUS AND RETROPROPULSION MODULE

This article is the third of three about the thermal design of the Galileo spacecraft (Casani, J. R., "Galileo's New Route to Jupiter," American Astronautical Society, Boulder, CO, Oct. 1986; and Reeve, R. T., "Thermal Redesign of the Galileo Spacecraft for a VEEGA Trajectory," AIAA Paper 89-1748, June 1989). Emphasis in this paper is on the thermal design of the Orbiter's bus and retropropulsion module central body, which houses the spun electronics and tankage, respectively. The thermal design of the central body is unique because it utilizes the internally mounted shunt radiator as the primary heat source. Cruise temperatures from the verification test in a space simulator in August 1988 are presented. Analytical results illustrating how the design responds during launch and in the event of an abort from orbit are discussed.