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- W885428169 abstract "ABSTRACT A Possibility of combustion instability on longitudinal mode has a high level at large scale of L/D. Solid propellant has a metal particle and a grain of control to pressure oscillation. Solid rocket motor in slotted-tube grain controls pressure oscillation of longitud inal mode. Slotted-tube grain restrains longitudinal 1st pressure oscillation. But cavity volume of aft . insulation ablation amplifies 2nd pressure o scillation by vortext shedding. A study has suppressed combustion instability and vortex shedding by modified 4 slotted tube solid rocket motor design.초 록 직경 대 길이비(L/D)의 값이 큰 고체 추진기관에서는 축방향 연소불안정 현상이 발생할 가능성이 높다. 일반적으로 이러한 현상을 억제하기 위해 추진제에 금속입자를 포함시키거나 그레인 설계시 축방향 압력 진동을 억제할 수 있도록 형상을 고안한다. Slotted-Tube형 그레인을 적용한 고체 추진기관은 연소시 Slot의 영향으로 인해 축방향 1차 모드 압력진동이 억제되나 연소관 후방 내열재 삭마로 인해 공동이 형성되어 Vortex Shedding에 의한 2차 모드 압력진동이 증폭될 수 있다. 본 연구에서는 4 Slotted Tube형 고체 추진기관의 설계 개선을 통해 Vortex Shedding을 억제하여 연소불안정 현상을 개선하였다.Key Words: Solid Rocket Motor(고체 추진기관), Combustion Instability(연소 불안정성), Spectrum Analysis 스펙트럼분석), Acoustic Modal Analysis(음향모드 해석), Vortex Shedding(와류 발산)" @default.
- W885428169 created "2016-06-24" @default.
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- W885428169 date "2011-01-01" @default.
- W885428169 modified "2023-09-23" @default.
- W885428169 title "An Analysis on Combustion Instability in Solid Rocket Motor of 4 Slotted Tube Grain" @default.
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