Abstract
The paper considers the problem of fuel residues in the commercial tank of the spent stage of the launch vehicle. The analysis of existing methods of passivation of fuel residues in tanks in spacecraft and spent stages of launch vehicles is carried out. Using the example of the hydrogen peroxide torus tank of the first stage of the Soyuz-2.1v launch vehicle, a method is proposed for blowing liquid fuel residues out of the tank by injecting a boost gas. Under the action of centrifugal forces, the hydrogen peroxide residues are distributed along the walls of the tank in the form of a liquid film. CFD modeling of tangential gas input into a torus tank with hydrogen peroxide residues was carried out. The dependences of the velocity of the liquid film on the gas input velocity are obtained.
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