• Journal of the Korean Institute of Gas
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• v.21 no.1
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• pp.52-58
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• 2017

According to 2015 ministry of public safety and security statistics, product of combustion makes the most victims while fire. for that reason, recent studies about combustion products have been researched actively in domestic and foreign papers. In domestic, study is handling the combustion product effects on human body and flame propagation. Foreign study is conduct about combustion product effects to shelter in offshore and toxic effects on human. because combustion product is toxic and disturb escape by block the view, many research conducted about optimize combustion product removal facilities using dispersion experiments and CFD simulations. In this study, this paper analysed research trend about toxic gas production model while combustion and its removal facilities, it will be the standard of combustion products research.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.11a
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• pp.45-48
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• 2008

Micro power generators have been studying to provide high power that micro systems require. Micro power generators need micro combustor. Swiss-roll combustor has been studied about scale, geometry, material. From previous study experiments have shown that swiss-roll combustors require thin walls with low thermal conductivity for maximum performance at small scales. In this work, polyimide combustors with low thermal conductivity and thin thickness are built and tested.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2008.05a
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• pp.133-137
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• 2008

Results of combustion tests performed for a regenerative cooling combustor of a 30 tonf-class liquid rocket engine were described. The combustion chamber has chamber pressure of 60 bar, propellant mass flow rate of 89 kg/s, and nozzle expansion of 12. The combustion chamber is composed of mixing head, baffle injector, and regenerative cooling chamber. The hot firing tests were performed at design and off-design points. The test results show that the combustion characteristic velocity is in the range of 1738${\sim}$1751 m/sec and the specific impulse of the combustion chamber is in the range of 253${\sim}$270 sec. The peak of combustion characteristic velocity and specific impulse for this combustor is shown at mixture ratio of 2.35 and 2.5, respectively.

• Resources Recycling
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• v.15 no.1 s.69
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• pp.46-57
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• 2006

For the development of combustion technology of RDF(refuse derived fuel), combustion characteristics are examined in bubbling fluidized bed, circulating fluidized bed, continuos combustor and batch type combustor. The characteristics of combustion and exhaust gas has been compared and analyzed in many type of combustion facilities, which has been utilized as basic data for the advanced research of specified RDF combustion facility. Stable combustion has been observed in bubbling and circulating fluidized bed from controled operating condition like the proper feeding rate and superficial gas velocity. In circulating fluidized bed, concentration of NOx has been increased with the operating condition by the fuel-NO and oxygen reaction and $SO_2$ can be considered not to be produced in RDF fluidized bed from very low concentration in flue gas. HCl concentration is 36.4 ppm as average value and lower than standard emission value, but the counter plan is needed. Shaped RDF and fluff RDF have been compared in continuos combustor and batch type combustor and shaped RDF shows benefit for the stable heat recovery and gas emission shows similar value and characteristics.

• 전기의세계
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• v.31 no.3
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• pp.187-190
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• 1982

발전효율은 증기발생용 수질 보일러의 구조 및 재질 등 여러가지가 있겠으나 그중 연료의 연소효율이 가장 중요하여 이것과 관련한 성상 및 연료현상에 대하여 기술하고 또한 국내에서는 이를 성능시험에 대한 제도적 장치 및 기법이 확립되어 있지 않아 성능 기준의 판정이 곤란한 실정이므로 측정 방법도 간단히 부연하였다.

• Aerospace Engineering and Technology
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• v.4 no.1
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• pp.49-56
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• 2005

Hot firing performance test of hydrazine decomposition catalyst used for monopropellant thruster of the satellite and the launch vehicle was performed. Test equipment for catalyst test was developed in collaboration with Hanwha Corp., reaction delay time, catalyst activity and granule stability of the catalyst firing performance were measured and analyzed with the equipment. In addition, the current development of prototype catalyst is introduced.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.885-891
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• 2011

This paper describes the results of preliminary design of rocket engine test facility for the performance evaluation of liquid rocket engine. Design specification and composition of rocket engine test facility are suggested based on the design requirements. The results of the preliminary design of rocket engine test facility will be used as base data for the detail design and construction of rocket engine ground test facility of KSLV-II 75tonf liquid rocket engine.

• Transactions of the Korean Society of Automotive Engineers
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• v.12 no.4
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• pp.31-35
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• 2004

A new combustion strategy called LIFC(Late Injection ＆ Fast Combustion) was developed for simultaneous reduction of particulate matter(PM) and nitrogen oxides(NOx) in exhaust emission of diesel engines, In this study, effects of injection timing and injection pressure under relatively high EGR rate were investigated. The experiments were conducted in a conventional engine over a range of commercial engine speed. The test engine could be operated in LIFC up to 2000rpm / bmep 5 bar condition with significant reduction of NOx and PM. The experimental results showed potential for the mechanism of the simultaneous reduction of NOx and PM from HSDI diesel engines.

• Proceeding of EDISON Challenge
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• 2014.03a
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• pp.603-609
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• 2014

차세대 제트 추진기관으로 주목받고 있는 스크램제트 엔진의 핵심은 연소기 내부에서의 성공적인 초음속 연소를 필요로 한다. 초음속 연소는 공기-연료 혼합(fuel-air mixing)의 정도에 따라 연소효율이 영향을 받게 된다. 공동형 화염 보염기(cavity flameholder)는 재순환 영역(recirculation zone)을 생성하여 연료 혼합의 효율을 높여 지속적인 초음속 연소가 진행될 수 있는 시간을 제공한다. 본 연구에서는 EDISON 전산유체역학 소프트웨어를 이용하여 공동형 화염 보염기를 지나는 초음속 유동의 재순환 영역과 전압력 변화에 대한 전산 해석을 수행하였다. 초기 형상을 생성하여 유동 해석을 수행한 후, 3개의 형상 변수에 대한 매개 변수 연구를 통하여 공동의 형상과 위치에 따른 재순환영역의 제어가 가능함을 확인하였다.

• Journal of the KSME
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• v.30 no.6
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• pp.521-534
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• 1990

유동층 연소방식을 이용한 열병합설비는 상당수가 전세계적으로 성공리에 운전되고 있으며, 연료의 폭넓은 수용성, 저온연소에 기인한 저공해 특성으로 인해 기존연소 방식보다 월등한 강 점이 인정되고 있다. 따라서 에너지 활용의 극대화와 환경오염의 최소화라는 두가지 명제를 만족시키는 금세기 최대의 매력적인 석탄 연소 방법으로서 유동층 연소 기술은 지속적인 확산이 예상된다. 그러나 그 동안의 문제가 제작자와 사용자의 노력에 의해 거의 해결되었다고는 하나, 아직도 대형화 및 기본설계상의 문제가 부분적으로 해결되어야할 숙제로 남아 있다. 최근의 추세는 다양한 형태의 설계개념이 차츰 서로 비슷해지는 추세로서, 이는 구체적인 설계과정에서 최적 시스템으로 취합되는 경향을 나타내고 있다. 각공정에 맞는 최적 시스템/최적 설계를 도 입하기 위해서는 각 제작자의 독특한 시스템에 대한 검토 분석이 있어야 하며, 사용코자하는 연료와 석회석의 물리화학적 특성을 사전에 분석하여 선택코자 하는 유동층 시스템과의 적합성 여부에 대한 사전 검토가 요망된다.