A study of acoustic coupled instability at the propulsion test facility for KSR-III rocket

KSR-III Rocket 종합 시험 설비에서 발생한 열-음향 불안정 현상에 관한 연구

Acoustic coupled combustion instability, which is one of the most undesirable phenomena in the development of liquid propellant rocket engine, can cause serious damage to a rocket itself, and must be avoided by all means. Unfortunately, KSR-III rocket went through combustion instability during engine start at the propulsion test article No.2. To resolve the problem, time sequence (cyclogram) has been changed, and baffle system has been applied. In consequence of change, stable combustion was achieved.