A. N. Albutov - Chef of Sector, JSC «GSKB Almaz-Antey named after A.A. Raspletin», Moscow. E-mail: forozzo@front.ru
K. V. Bologov - Chief of Division, JSC «GSKB Almaz-Antey named after A.A. Raspletin», Moscow. E-mail: konstantin@feelings.com
D. N. Davydov - Engineer, JSC «GSKB Almaz-Antey named after A.A. Raspletin», Moscow. E-mail: deni_s86@mail.ru

The chief element of automatic launching system is the missile power supply system (MPSS) module. Each module includes: management control board; voltage pay-converter; secondary power supply sources (MDM converters). The work of power supply sources and voltage converters produces significant heat flow, so each MPSS module has radiative surface for normal thermal operation. Excessive heating of secondary power supply sources considerably change their output parameters: voltage and efficiency. Management control board overheat is not allowed (Tlimit = 85°C). Optimization questions of radiator design are observed in the article due to decrease of weight and provide more effective heat removal saving radiator construction constraints. Mathematical modeling and calculation were made using Flow Simulation application of SolidWorks 2013 Software package. Numerical modeling was performed using Reynolds - averaged Navier Stokes equations with k ε turbulence model. Solution was found in stationary and non stationary form. During optimization different radiator patterns were analyzed according with construction features due to increase air speed between radiator edges in maximal heat place. Ten patterns were calculated; every next calculation change was based on previous analysis results. After the executed optimization, working temperature of management control board became normal (Tmax ≤ 85°C), the radiator weight had been decreased up to 25%.