• Title/Summary/Keyword: 연소 가스

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An Experimental Investigation of Combustion Characteristics in a Model Combustor by Reproduction of GE 7FA+e DLN-2.6 Gas Turbine (GE 7FA+e DLN-2.6 연소기를 모사한 모형 가스터빈 연소기의 연소불안정 특성에 대한 실험적 연구)

  • Kim, Min-Ki;Lee, Jang-Su;Park, Seong-Soon;Yoon, Young-Bin
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2009.11a
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    • pp.231-235
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    • 2009
  • The mainly objectives of this study was a combustion dynamics and instability characteristics in a model dump type combustor which is scale down of GE 7FA+e DLN 2.6 gas turbine combustor with running at Seo-Inchon combined cycle power plant. Model gas turbine injector has 2-stage swirl vane and it's reduced 1/3 size of the original one. The shape of plenum and combustor were designed for similar acoustic characteristics. As the result, this research have been shows the peak frequency of model combustor was changed quarter-wave mode to Helmholtz resonator mode in plenum and longitudinal mode in dump combustor at unstable flame conditions caused by the different of combustor temperature and fuel-air mixture distributions.

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Combustion Characteristics of a Gas Generator Associated with a Turbopump (터보펌프 연계상태의 가스발생기 연소 특성)

  • Seo, Seong-Hyeon;Ahn, Kyu-Bok;Han, Yeoung-Min;Choi, Hwan-Seok
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2008.11a
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    • pp.133-136
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    • 2008
  • The present study presents experimental results of combustion tests of a fuel-rich gas generator associated with a turbopump. Five combustion tests had been successfully executed. Static pressures of the gas generator promptly reacted to propellant supply variations from the turbopump. A closed-loop test for driving the turbopump revealed no flaw. Exit gas temperature results are very similar to previous ones. An orifice was effective on the suppression of pressure fluctuations although tests conducted below 45 bar showed the same dynamic behaviour as that of component-only tests.

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충돌형 가스발생기 탈설계점 연소시험

  • Kim, Seung-Han;Han, Yeung-Min;Seo, Seong-Hyeon;Moon, Il-Yoon;Lee, Kwang-Jin;Kim, Jong-Kyu;Seol, Woo-Seok
    • Aerospace Engineering and Technology
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    • v.3 no.2
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    • pp.81-90
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    • 2004
  • This paper describes the results of combustion performance test of fuel-rich gas generator(GG) using LOx and kerosene as propellant at off-design conditions. The chamber pressure is thought to be a function of O/F ratio and total propellant mass flow rate. The test shows that the spatial temperature deviation at the exit of gas generator remains within 7.5K and that the average gas temperature at the exit is a function of propellant O/F ratio. The results of firing test of gas generator at off-design conditions, especially the relation between gas temperature and O/F ratio, can provide useful data for the design of future gas generator and for the development of low-O/F ratio reaction analysis code.

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A Study for Bioassay on the HBr Combustion Toxity (생물학적 분석을 통한 HBr의 연소 독성에 관한 연구)

  • Cho, Nam-Wook;Shin, Hyun-Joon;Lee, In-Ku;Oh, Eun-Ha
    • Journal of the Korean Applied Science and Technology
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    • v.29 no.4
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    • pp.545-551
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    • 2012
  • Due to the use of polymeric materials in construction materials, the fire combustion gases that occur in the fire are various. The one of combustion gases, HBr is measured to evaluate the toxicity of the combustion gases in the FTP Code Part 2, Standard NES 713 and Standard BS 6853. According to the MSDS, Inhalation of HBr gas especially cause burn, respiratory dysfunction, headache, etc. The people who are exposed to 50ppm of HBr gas, very irritant gas may also frequently result in both immediate death and post-exposure deaths due to pulmonary complications. In this paper, we conduct a research on the combustion toxicity of HBr gas hazardous test which is motility measurement of the mice exposed to the HBr standard gas comparing the biological analysis result.

Effect of $CO_2$ dilution on Combustion Instabilities in dual premixed flame (이중 예혼합화염에서 $CO_2$ 희석이 연소불안정에 미치는 영향)

  • Lee, Kang-Yeop;Kim, Hyung-Mo;Park, Poo-Min;Hwang, O-Sik;Yang, Soo-Seok;Ko, Young-Sung
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2011.11a
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    • pp.763-768
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    • 2011
  • The effects of $CO_2$-dilution on combustion instability were studied in order to apply biogas in a dual lean premixed gas turbine combustor on a real-scale dual lean premixed burner head which is originally developed for Natural Gas fuel. Combustion instability is reduced by $CO_2$ dilution effect according to the result of dynamic pressure signal and phase-resolved $OH^*$ images. The reason for this is that dilution of $CO_2$ reduces heat release perturbation and increases flame volume due to reduction of the flame speed and expansion of flame surface.

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Performance Test of Metal 3D Printed Micro Gas Turbine Engine Combustor (초소형 가스터빈 엔진용 금속 3D 프린팅 연소기 성능 시험)

  • Kim, Jaiho;Kim, Hyungmo;Park, Poomin;Rhee, Dongho
    • Journal of the Korean Society of Propulsion Engineers
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    • v.23 no.6
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    • pp.51-58
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    • 2019
  • In this study, a set of performance tests on 3D-printed combustor components were carried out to investigate the performance of 3D-printed component and its feasibility for micro gas turbine engines. The test were conducted for four different equivalence ratios under two different engine operating conditions. The measurement results show that the tested combustor had a low total pressure loss coefficient and a uniform exit temperature distribution. However, the combustion efficiency values are less than 93.5% owing to the large amount of UHC and CO, which is considerably lower than a typical gas turbine engine combustor. The performance data obtained from the tests will be used for combustor performance improvements using 3D-printing technology.

A Numerical Study on Mixing of Fuel/Air Mixture and NOx Emission in a Gas Turbine Burner with a Vortex Generator (와류 발생기를 장착한 가스터빈 연소기에서 연료/공기 혼합 및 NOx 배출 특성에 관한 수치적 연구)

  • Kim, Gu;Lee, Young Duk;Sohn, Chae Hoon
    • Journal of the Korean Society of Combustion
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    • v.18 no.3
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    • pp.68-74
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    • 2013
  • 가스터빈용 희박 예혼합 연소기 내부에 와류 발생기(vortex generator)를 장착하여 그에 따른 연료/공기혼합 및 NOx 배출 특성 변화를 조사하였다. 이를 위해 수치해석적 방법을 채택하여 연소기내 유동특성, 연료/공기 혼합도, 배기가스(NOx), 화염형상을 분석하였다. 와류 발생기를 장착한 경우, 연소기 내부에서 와류 발생기에 의한 나사산 형상으로 인해 와류가 형성되며 이는 연소기 전면부까지 유지되었다. 또한 연소기 내부 면적 차로 인해 압력섭동이 발생하였다. 이와 더불어 연소기 전면부 기준 상류지역의 연료와 공기의 혼합도가 증가됨으로서 연료 과농지역이 감소하게 되며 이로 인해 전반적인 NOx 발생량의 감소 효과를 볼 수 있었다. 화염 형상의 변화로부터 와류 발생기의 영향으로 선회수는 다소 감소할 것으로 예상되며, 이는 와류 발생기로 인한 유속의 반복적 증감에 의한 결과라고 판단된다.

가스누설 화재경보설비 개요

  • 유재환
    • Journal of the Korean Society of Safety
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    • v.7 no.3
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    • pp.108-116
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    • 1992
  • 가스누설에 의한 화재는 폭발을 동반하는 경우가 많을 뿐만아니라 연소가 급격하게 이루어지고, 피해 또한 크기 때문에 이를 미연에 방지하기 위하여 지하가등 일정규모 이상의 특정방화 대상물에서 가스연소기를 사용할 경우에는 가스누설 화재경보설비의 설치를 의무화하고 있다.(중략)

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Optimal Design and Combustion Analysis of Fuel-rich Gas Generator for Liquid Rocket Engine Based on RP-1 fuel (RP-1연료를 사용한 농후연소 가스발생기의 최적설계 및 연소해석)

  • 권순탁;이창진
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • 2003.05a
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    • pp.258-261
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    • 2003
  • The optimal design and combustion analysis of the gas generator for Liquid Rocket Engine (LRE) were performed. A fuel-rich gas generator in open cycle turbopump system was designed for 101on1 in thrust with RP-1/LOx combination. The optimal design was done for maximizing specific impulse of main combustion chamber with constraints of combustion temperature and power matching in turbopump system. Results of optimal design show the dimension of length, diameter, and contraction ratio of gas generator. The configuration of the gas generator and the condition for performance which can maximize the objective function were determined and found to meet the design constraints. Also, the combustion analysis was conducted to evaluate the performance of designed chamber and injector of gas generator. And the effect of the turbulence ring was investigated on the mixing enhancement in the chamber.

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Study of the $SO_2$ combustion gases occurring from a livestock waste biogas power system (축산바이오가스발전시스템 가동 시 발생되는 연소 배기가스 중 $SO_2$에 관한 연구)

  • Choi, Jaejoon;Jung, Daehun;Park, Byungsik;Park, Jinsung;Huh, Changsu
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.05a
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    • pp.173.2-173.2
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    • 2011
  • 대체 에너지 자원 중 폐기물의 소화 가스를 이용한 바이오가스 발전은 이산화탄소에 비해 온실효과 영향력에 21배에 해당하는 메탄가스를 연료로 사용하여 환경부하를 저감시키고 에너지를 생산한다. 바이오가스에 포함된 $H_2S$는 연소 후 $SO_2$형태로 발생되는데 $SO_2$는 수분과 반응을 하게 되면 $H_2SO_4$등의 강한 산성을 띄는 물질로 생성되어 배관 및 발전기에 손상을 주고 저온부식현상을 유발하게 하며, 동물이나 인체에 노출되면 기관지 수축현상이 일어나 호흡기에 영향을 주는 질식성을 띄는 가스이다. 축산바이오가스에 포함된 $H_2S$의 함유량과 가스엔진의 연소 시 배출되는 $SO_2$ 배기가스 성분의 관련성을 검증하기 위해 60-65%의 $CH_4$와 30-35%의 $CO_2$ 성분의 바이오가스를 50kW급 발전기에서 사용하였고 연소 후 배출되는 가스 성분을 분석하였다.

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