• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2006.11a
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• pp.247-250
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• 2006

In the previous study, we have developed an ultrasonic measurement system and analysis technique for borning rate testing of solid propellants using ultrasound. And then, using the developed system, burning rate of composite propellants were measured. So, in this study, we performed measurement of double base solid propellant, which has non-linear homing rate as pressure increasing, using the developed system in order to evaluate capability of ultrasonic method. Furthermore, accuracy of measured homing rates using ultrasound was verified by comparison to homing rate measured by the strand burner method.

• Aerospace Engineering and Technology
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• v.12 no.1
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• pp.163-172
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• 2013

In this study, the cooling of rocket exhaust plume by sprayed water inside plume were investigated as varying of sprayed water mass, location, and method using computational fluid analysis. For Analyze rocket exhaust plume, a single species unreacted analysis model based on the chemically frozen analysis was used and the discrete particle model which was a kind of Euler-Lagrangian analysis model was used for simulate sprayed water inside plume. It was confirmed that the temperature of plume was reduced without cooling when water mass was two times of plume mass through analysis results.

• Transactions of the Korean Society of Mechanical Engineers
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• v.13 no.4
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• pp.717-725
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• 1989

An experimental investigation on the combustion behavior of pulverized coal particles was performed using the cross-section micrography techniques while sample coal particles were collected in-situ from the flow reactor. The coal particles were representative of pulverized bituminous coal undergoing a raped pyrolysis and combustion, however, quenched at the time when the particles were deposited onto a sample plate. The internal structure of coal was observed to change as deposited. Upon injection into a flow reactor, bituminous coal particles showed many holes which represented internal pore formation during the pyrolysis. The relative portion of the remaining matrix of coal was decreasing as the residence time progressed. This direct observation of cross-section of burning particles enabled better understanding of the coal combustion behavior.

• Journal of the Korean Society of Propulsion Engineers
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• v.17 no.5
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• pp.47-53
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• 2013

In this study, In order to develop the measurement method of high energy density metal aluminum dust cloud combustion, flame temperature and emission spectrum was measured using spectrometer. Because of the ultra high ${\mu}m$-sized aluminum flame temperature more than 2400 K, it was measured by non-contact optical technique which is the modified two wavelength pyrometry with 520, 640 nm and spectrum comparison method. These methods were applied to experiment after accurate verification. As a result, we could identify that flame temperature is more than 2400 K in bottom of combustor in both methods. And on the emission spectrum analysis, we could measure AlO radical which is occurred dominantly in aluminum combustion.

• Proceedings of the Korean Ceranic Society Conference
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• 2000.04a
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• pp.145.1-145.1
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• 2000

• Proceedings of the Korean Ceranic Society Conference
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• 2000.10a
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• pp.32.1-32
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• 2000

• 보일러설비
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• s.2
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• pp.72-79
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• 1988

저온수 난방방식인 연탄용 온수온돌이 지난 `60년후반 민간연구가들에 의해 개발된 이래 실사용 열효율이 40$\%$ 미만인 점을 감안, 필자는 현장조사연구, 현장실험, 온수온돌 시공법 강의, 연탄연소기기에 관한 한국공업규격 등의 심의 과정에서 얻은 지식을 토대로 연탄연소의 기초이론, 연탄용 온수온돌의 시공방법, 온수온돌의 하자발생 원인 분석 및 그 대책을 제시하고자 한다.

• 보일러설비
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• s.3
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• pp.68-74
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• 1988

저온수 난방방식인 연탄용 온수온돌이 지난 `60년후반 민간연구가들에 의해 개발된 이래 실사용 열효율이 40$\%$ 미만인 점을 감안, 필자는 현장조사연구, 현장실험, 온수온돌 시공법 강의, 연탄연소기기에 관한 한국공업규격 등의 심의 과정에서 얻은 지식을 토대로 연탄연소의 기초이론, 연탄용 온수온돌의 시공방법, 온수온돌의 하자발생 원인 분석 및 그 대책을 제시하고자 한다.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2010.04a
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• pp.59-63
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• 2010

Seven different size of orifice were applied in a constant volume combustion chamber for evaluating the effects of torch-ignition on combustion. The initial flame development and flame propagation were analyzed by the mass fraction burn and combustion enhancement rate. The combustion pressures were measured to calculate the mass fraction burn and the combustion enhancement rates. In addition, the flame propagations were visualized by the shadowgraph method for the qualitative comparison. The result showed that the combustion pressure and mass burned fraction were increased when using the torch-ignition device. The combustion enhancement rates of torch-ignition cases were improved in comparison with conventional spark ignition. Finally, the visualization results showed that the torch-ignition induced faster burn than conventional spark ignition due to the earlier transition to turbulent flame and larger flame surface, during the initial stage.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.451-452
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• 1999

석탄이나 석유와 같은 화석연료의 연소 시 대기 중에 발생되는 황산화물의 배출저감 방법으로서 사용연료의 황 함유량을 감소시키는 연소 전 처리방법과 연소과정 중 제거방법, 연소 후 제거하는 방법으로 구분할 수 있다. 본 논문에서는 전기 생산능력 40만 kW 급 중유화력 발전소의 연료 연소 후 배기가스 중 황 성분을 제거하는 방법으로 석회석 슬러리와 배기가스를 효과적으로 접촉시켜 SOx 와 먼지 등의 환경오염물질을 제거하고 부산물로 재활용 가능한 고순도의 석고를 생산하게 되는 JBR (Jet Bubbling Reactor) 형식의 습식 석회석-석고법 배연탈황 시스템을 소개하고자 한다.(중략)