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NTIS 바로가기한국항공우주학회지 = Journal of the Korean Society for Aeronautical & Space Sciences, v.42 no.10, 2014년, pp.858 - 869
김지훈 (Department of Aerospace Engineering, Pusan National University) , 김태영 (Department of Aerospace Engineering, Pusan National University) , 진완성 (Department of Aerospace Engineering, Pusan National University) , 최정열 (Department of Aerospace Engineering, Pusan National University)
Most of the aerospace propulsion is based on the Brayton cycle, in which the combustion is held through the constant pressure process, but further improvement of performance by increasing compression ratio is challenged by mechanical limits. Detonation propulsions, regarded promising for high-speed ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
PDE란? | PDE는 펄스 형태의 데토네이션 파를 직선 관을 통해 전파시키면서 추력을 얻는 차세대 추진기관으로, 높은 주파수의 사이클 작동을 통하여 연속적인 추력 발생이 PDE 엔진의 주요 작동기구이다. PDE의 사이클은 Fig. | |
PDE에서 엔진 중량 측면에서 이득을 기대할 수 있으며, 데토네이션의 압축 효과로 인하여 높은 추력대 중량비를 기대할 수 있는 이유는? | PDE에서는 기존의 가스터빈엔진에 필요한 압축기가 필요하지 않기 때문에 비교적 단순한 구조로 이루어져있다. 따라서 엔진 중량 측면에서 이득을 기대할 수 있으며, 데토네이션의 압축 효과로 인하여 높은 추력대 중량비를 기대할 수 있다. | |
펄스제트엔진의 단점은 ? | PDE는 주기적 작동 측면에서 펄스제트엔진(pulse jet engine)과 매우 유사하다. 그러나 아음속 연소를 이용하는 펄스제트엔진은 압축 메커니즘이 없으므로, 얻을 수 있는 압력비가 낮아 열효율 측면에서 더 이상 실용적인 추진기관으로 고려되고 있지 않다. 반면, PDE는 데토네이션 충격파에 의하여 별도의 압축 장치 없이도 높은 압력비를 얻을 수 있기 때문에 차세대 추진기관으로 연구되고 있다. |
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