CANCELLED - Bulging Process Design of Inner Liner for Nozzle Throat of Thrust Chamber

An outer jacket shape for brazing with a bulged inner liner used in the 7-tonf class thrust chamber of the third stage engine has been designed. Design of the forming tools for multi-stage free bulging process and a series of numerical simulation had been carried out to verify the shape difference between the outer jacket and formed inner liner. From the result, undeformed region was observed near the nozzle throat and the shape difference has been compensated by considering the gap distribution between the inner liner and the final stage bulging tool. Subsequential simulations using the modified model had been conducted and it was confirmed that the shape deviation of the deformed nozzle was properly compensated without any gaps.