Abstract
극초음속 비행체에서는 공기와의 마찰열과 엔진열의 증가로 기체 내부의 열적 부하가 발생한다. 이는 비행체 내부 구조물의 변형을 일으키고 오작동을 발생시킬 수 있다. 흡열연료는 액체 탄화수소 연료로 흡열반응을 통해 열을 흡수할 수 있는 연료이다. 본 연구에서는 exo-tetrahydrodicyclopentadiene을 모델연료로 선정하고 흡열 냉각 시스템에 제올라이트 촉매를 사용하여 흡열반응을 수행하였다. 세가지 형태로 촉매를 성형하여 각 형태별 흡열 성능 차이를 관찰하였다. 본 연구에서 바인더가 첨가된 촉매가 더 높은 흡열량과 전환율을 보였다. 생성물 분석 결과 바인더 첨가 촉매에서 방향족의 생성이 더 많은 것을 확인하였다. In hypersonic aircraft, increase of aerodynamic heat and engine heat leads heat loads in airframe. It could lead structural change of aircraft's component and malfunctioning. Endothermic fuels are liquid hydrocarbon fuels which are able to absorb the heat load by undergoing endothermic reactions. In this study, exo-tetrahydrodicyclopentadiene was selected as a model endothermic fuel and experiments were investigated in endothermic fuel cooling system with zeolite catalyst. Three shapes of catalysts have been manufactured and endothermic characteristics were recovered. Bineded catalyst showed higher heat absorption and conversion than other two zeolite catalysts. In product distribution, binded catalyst showed higher aromatics composition.
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