Abstract
In this paper the mathematical modeling of the interaction of a twin supersonic jet with a flat obstacle in Mars environment and Mach numbers at the nozzle exit 4.5 are considered. The effect of the distance between the nozzles on the shock-wave structure of the jets and their force on obstacle are investigated. The distance ranged from 0.1 to 4 nozzle exit diameters (L/D). It is found that the self-oscillating mode is observed only for the case L/D = 1.5, for the rest of the cases the stationary mode are implemented. With an increase in the distance between the nozzles, the maximum pressure on obstacle decreases from 33 kPa to 13 kPa. In the case when the plumes do not close L/D = 4, the force effect of the jets is 2.5 times less compared to L/D = 0.1.
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