In turbopump type liquid rocket engines, ignition and starting are known to be the most unstable and risky section among all operating sections of the projectile. The operation of the liquid rocket engine is the process of ignition and combustion of the main combustor after the turbo pump is driven into a stable section due to the turbine driving of the turbo pump and the ignition and combustion of the gas generator by the pyro starter. In this process, the driving of related components directly influences each other, so each component must be operated with sufficient reliability. In particular, if the igniter does not supply sufficient ignition energy at a predetermined time, an explosion may occur due to stagnation of the fuel/oxidant mixture, so reliability is more important. In this study, the fracture analysis of the gas generator igniter rupture disk according to the shape was performed using computational analysis. As a result, comparative analysis was performed to obtain the optimal dimensions according to each variable condition.

Mealworm(Tenebrio molitor) was added to the feed to improve the health of dogs. As the amount of mealworm powder added to dog feed increased from 2.5 to 7.5%, the contents of crude protein, crude fat, crude fiber and crude ash increased. In the old dogs, creatinine and BUN related to nephropathy, triglyceride related to hypertension, calcium related to osteoporosis, globulin related to immunity, and ALT related to hepatic function were in the normal range. Particularly, ALT showed a tendency to increase overall, but the numerical increase tended to decrease as the amount of mealworm powder added. In the young dogs, all investigative items such as BUN and creatine were in the normal range and ALT tended to decrease at 2.5～5.0% treatment of mealworm. As a result, it was shown that adding 2.5～5.0% of mealworm powder to feed effectively improved the hepatic function of old and young dogs.