The optimal shape of rocket nozzles depends on the pressure, which changes during the rocket's flight. In this work, we have studied a new solution for altitude compensation. The proposed solution is based on changing the shape of the nozzle for better performance. The study was carried out using CFD analysis of compressible flow with a dynamic mesh in the OpenFOAM software. The simulation results show a better performance of the deformable nozzle compared to the fixed nozzles. We have shown that the generated force of the deformable nozzle is mostly constant during the rocket's flight, i.e. it successfully compensates for pressure changes.
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