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과산화수소 가스발생기 설계와 터보차저를 이용한 동력 측정 방법 검토
박대종(Daejong Park),안성용(Sungyong An),권세진(Sejin Kwon) 한국추진공학회 2008 한국추진공학회 학술대회논문집 Vol.2008 No.11
터빈 제너레이터 구동을 위한 과산화수소 촉매분해반응을 이용한 가스발생기를 설계하였다. 90wt%의 rocket grade 과산화수소 가스발생기는 이산화망간을 촉매로 사용하였으며 온도와 압력조절이 용이하여 다양한 조건으로 터빈을 작동시키는데 적합하여 선정되었다. 가스발생기를 이용한 터빈 제너레이터에 대해 조사를 하고 소형 터빈 제너레이터를 개발하는데 앞서 차량용 터보차저를 이용하는 선행연구를 기획하였다. In this paper, the gas generator using hydrogen peroxide catalytic decomposition was designed for turbine generator operation. The gas generator used 90wt% rocket-grade of hydrogen peroxide and manganese dioxide as a catalyst. Turbine generators utilizing gas generators were investigated and the prestudy was prepared using automobile turbocharger instead of turbine generator.
박현철(Hyunchul Park),문용준(Yongjun Moon),박대종(Daejong Park),권세진(Sejin Kwon) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
The tire pressure monitoring system (TPMS) market is rapidly growing with legislation making TPMS installation obligatory among automotive developed countries?i.e., Japan, EU, and Korea?in 2012, after the same bill progressed in the USA in 2007. So far, TPMS research is mostly concentrated in the ultralow-power circuit field. However, one of the biggest challenges is overcoming the unavoidable replacement of batteries owing to the self-discharging, unstable performance, etc. of the batteries. Energy-harvesting technology is the only candidate to substitute battery technology. Energy harvesters are modules that generate electric power to operate sensing nodes by gathering wasted energy in the surrounding area. There were two core questions for the key challenges examined in this study: “Which energy source do we use?” and “How much energy do we generate?” The answers would be the design constraints included with the suggested volume of energy harvester.
이성구(Sunggu Lee),박대종(Daejong Park),권세진(Sejin Kwon) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
과산화수소와 케로신을 이용한 이원액체추진제 로켓엔진을 위한 산화제 터보펌프를 설계하였으며 수류시험을 통해 설계된 터보펌프의 작동여부를 실험하였다. 과산화수소 터보펌프의 설계조건을 결정하고 펌프의 임펠러를 설계하였다. 펌프를 구동하기 위한 터빈을 차량용 터보차저로 선정하였으며 터빈 맵을 이용하여 가스발생기를 설계하였다. 펌프, 터빈과 가스발생기를 통합하여 터보펌프 시스템을 구축하였으며 수류시험을 통해 터보펌프 시스템이 1.47 bar의 압력으로 3.4 kg/s의 유량을 공급하는 것을 확인하였다. Hydrogen peroxide turbopump was designed for bi-propellant liquid rocket engine using hydrogen peroxide and kerosene as propellants. Turbopump operation was verified through water tests. Design conditions of hydrogen peroxide turbopump were determined, and impeller was designed. Turbine which drives pump was selected from commercial turbocharger. Gas generator was designed by reference from turbine map. Pump, turbine, gas generator were integrated, and turbopump system was constructed. Turbopump supplied water by 1.47 bar of pressure and as well as 3.4 kg/s of mass flow rate.
인젝터 방식 및 촉매 알갱이 크기에 따른 과산화수소 단일추진제 추력기의 응답 특성
안성용(Sungyong An),박대종(Daejong Park),정승미(Seungmi Chung),권세진(Sejin Kwon) 한국추진공학회 2009 한국추진공학회지 Vol.13 No.1
The response characteristics of H2O2 monopropellant thrusters at a pulse mode were presented in this paper. A catalyst bed was fixed to MnO2/Al2O3 to investigate the thruster design effect to response time. Three different thrusters (50 N class) having different injectors, ullage volumes, catalyst grain sizes, and reactor volumes were prepared to investigate the response characteristics. As a result, the ignition delay, pressure rising and tail-off time of case 2-2 thruster with 16-20 mesh catalyst size were 14, 108, 94 ms respectively, which were comparable to requirement of response time at commercial hydrazine thrusters.