A first step into the fluid-structure interaction related thickness optimization of a full-scale Vulcain 2 equivalent sub scale nozzle

摘要

For a rocket engine nozzle ovalization related validation of Fluid-Structure Interaction (FSI) codes (two-way-coupling of a non-stationary CFD code and a non-stationary structural FE code), results of ovalization tests with a dedicated N_2 cold flow sub scale nozzle can be used. However, for this purpose, the wall thickness of the above mentioned sub scale nozzle has to be determined in a way, leading (during its cold flow operation) to an identical FSI behavior as the related full scale nozzle during its hot run. In this manuscript, such a sub scale nozzle thickness optimization strategy is suggested and applied to an assumed Vulcain 2 geometry and thermal field as the related reference.