• 한국추진공학회지
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• 제27권1호
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• pp.58-67
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• 2023

본 논문에서는 메탄엔진 단일분사기급 연소기의 추력제어를 위해 수행된 드라이런 테스트, 수류시험, 그리고 연소시험 결과를 다루었다. 메탄엔진 연소시험설비의 산화제 및 연료 공급 라인에 유량제어 밸브를 설치한 후, 다수의 드라이런 테스트를 수행하여 밸브가 설정된 스트로크에 빠르고 안정적으로 도달할 수 있도록 하였다. 다음 액체질소와 기체질소를 사용한 수류시험을 진행하여 밸브 제어에 따른 모사 추진제의 안정적인 공급을 확인하였다. 최종적으로 액체산소와 기체메탄을 사용하여 정격 추력 대비 50%~10%의 고정 추력제어 연소시험과 연속 추력제어 연소시험을 성공적으로 수행하였다.

• 한국유체기계학회 논문집
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• 제14권4호
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• pp.38-44
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• 2011

This paper deals with the detail rotordynamic analysis for BB5 eight stages pump as development of API 610 BB5 type pump. Dry-run analytical model, not considering operating fluid, and wet-run analytical model, considering operating fluid are established. In addition, plain circular and pressure dam bearings are chosen and it was discussed that each bearing has an effect on dynamic characteristics of pump rotor system. A rotordynamic analysis includes the critical speed map, Campbell diagram, stability, and unbalance response. As results, it was predicted that rated speed of the pump rotor passes through 1st critical speed in dry-run condition regardless of bearings, however, it was verified that, in wet-run condition, the rotor system doesn't have critical speeds even if more than twice rated speed. Hence the resonance problem caused by the critical speeds does not happen since actual operating is in wet-run condition including operating fluid. As a result of unbalance response analysis, the pump rotor has stable vibration response at rated speed, regardless of operating fluid and the proposed bearing types.