http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 최인찬(Inchan Choi) (검색결과 44 건)
- 무료
- 기관 내 무료
- 유료
-
-
이중선회 연소기의 SNG 연료 적용을 위한 수소 첨가에 따른 화염 안정 특성
최인찬(Inchan Choi),윤승호(Seungho Yoon),이기만(Keeman Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
This article describes an investigation of combustion characteristics with various compositions of synthetic natural gas (SNG) in dual swirl combustor. The objective of this study is to investigate the flame stabilization, flame structure, fuel compatibility in SNG flame with varying fuel compositions. As experimental conditions, hydrogen content was adjusted from 0 to 11%. Moreover, addition of hydrogen enables keeping stable combustion condition when, for the same methane flow, the flame becomes lifted and very unstable. Experimental results show that the addition of hydrogen has a major effect on flame behavior due to the higher burning rates associated with hydrogen consequently, The higher reaction activity of hydrogen has increased the unstable or flashback region. However, stable flame region was shifted to the lean condition.
-
-
전기 자동차용 이산화탄소 열펌프 시스템의 열교환기 성능평가
최인찬(Inchan Choi),김영일(Youngil Kim),최종민(Jongmin Choi),이기만(Keeman Lee) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.5-2
Heat pump system using CO2 refrigerant was designed to develop a new air-conditioning system of an electric vehicle because there is no any other heating source like a IC engine for electric vehicles or fuel cell vehicles. In this paper, the heat exchanger of the heat pump system was analyzed. The heat exchanger performance was evaluated to various operating conditions such as different compressor speed, outdoor inlet frontal air velocities, air flow rates and temperatures passing through an heat exchanger using the precision CO2 calorimeter. The experimental results can be used to evaluate the effect of system design changes on system performance as well as the development of a highly efficient heat pump system.
-
PLIF 및 자발광 계측을 이용한 이중선회 가스터빈 연소기에서 연소불안정 모드 연구
최인찬(Inchan Choi),이기만(Keeman Lee),Mrinal Juddoo,A.R. Masri 한국연소학회 2014 한국연소학회지 Vol.19 No.1
This paper described an experimental investigations of combustion instability mode in a lean premixed dual swirl combustor for micro-gasturbine system. When such the instability occurs, a strong coupling between pressure oscillations and unsteady heat release excites a self-sustained acoustic wave which results in a loud, annoyed sound and may also lead a structural damage to the combustion chamber. The detailed period of flame behavior and heat release in combustion instability mode have been examined with high speed OH and CH-PLIF system and CH<SUP>*</SUP> chemiluminescence measurement, flame tomography with operated at 10 ㎑ and 6 ㎑ each. Experiment results suggest that unstable flame behavior has a specific frequency with 200 ㎐ and this frequency is accords with about 1/2 sub-harmonic of combustor resonance frequency, not fundamental frequency. This is very interesting phenomenon that have not reported yet from other previous works. Therefore, when a thermo-acoustic instability with Rayleigh criterion occurs, the fact that the period of heat release and flame behavior are different each other was proposed for the first time through this work.
-
-
하이브리드/이중 선회제트 연소기에서 공기 예열온도에 의한 배출 특성 연구
최인찬(Inchan Choi),조준익(Junik Jo),이기만(Keeman Lee) 한국연소학회 2012 KOSCOSYMPOSIUM논문집 Vol.- No.45
The laboratory experiments have been conducted to investigate the effects of air preheated temperature on the emission characteristics by a model gas turbine burner with a hybrid/dual swirl jet flames configuration. The concentration of NOx and CO emissions, and flue gas temperature at combustor exit were measured with varying the equivalence ratio for different air preheated temperatures of 300, 400, 500K at atmospheric pressure. It was overall shown that the NOx and CO emissions, and flue gas temperature were decreased according to the decreasing of equivalence ratio due to the effects of lean premixed combustion regardless of the air preheated temperature. Experimental results of a lean premixed flames configuration indicated that the NOx emission was increased with higher inlet air temperature and air flow rate, which is attributed to the increasing of flue gas temperature and heat release related to the thermal NOx mechanism. But the CO emission was shown the opposite tendency, that is, the CO emissionwas decreased with increasing of inlet air temperature and flow rate.
-
이중 선회 가스터빈 연소기에서 연소 불안정 주기에 관한 실험적 연구
최인찬(Inchan Choi),이기만(Keeman Lee),A.R. Masri 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.12
본 연구는 이중선회 가스터빈 희박연소기에서 연소 불안정성에 대한 실험적인 연구이다. 연소기의 큰 손상 및 소음을 야기 시키는 연소기내에서 연소 불안정 발생은 압력파와 열방출 간의 상호작용에 의하여 유발되는 것으로 알려져 있다. 연소 불안정 현상을 규명하기 위하여 당량비 변화에 따른 CH 및 OH-PLIF (10kHz)를 통해 열 방출에 대한 정보를 얻었으며, 연소실의 음향파를 측정하여 연소실에서 압력변화에 대해 파악했다. 그 결과 불안정한 화염영역에서 화염 거동이 200Hz의 일정한 주기를 가지고 있음을 확인하였으며, 그 주기는 연소실의 길이에 의존되는 연소실 공명 주파수의 1/2 subhamonic 주기와 일치하는 것을 확인하였다. This parer described experimental investigations of the unsteady in a lean premixed dual swirl gas turbine combustor. Strong coupling between pressure oscillations and unsteady heat release excites a self-sustained acoustic wave which results in a loud, annoyed sound and may also lead to a structural damage to the combustion chamber. Heat release period in region of combustion instability has been examined with OH and CH-PLIF system, flame tomography and PLIF operated at 10kHz. Experiment results suggest that unstable flame behavior has a specific frequency with 200Hz and this frequency is accords with 1/2 subhamonic of resonance frequency.
-
모사 SNG 연료를 적용한 모델 가스터빈 연소기의 연소 불안정성에 관한 실험적 연구
최인찬(Inchan Choi),이기만(Keeman Lee) 한국연소학회 2015 한국연소학회지 Vol.20 No.1
The combustion instability was experimentally investigated in model gas turbine combustor with dual swirl burner. When such instability occurs, a strong coupling between pressure oscillation and unsteady heat release excites a self-sustained acoustic wave which results in a loud sound, and can even cause fatal damage to the combustor and entire system. In present study, to understand the combustion instability with a premixed mixture, the detailed periods of pressure and heat release data in unstable flame mode were investigated by various measurement methods at relatively rich condition and lean condition near flammable limits. Also, to prepare the utilization of synthetic natural gas (SNG) fuel in gas turbine system, an investigation was conducted using a simulated SNG including methane as a reference fuel to examine the effects of H₂content on flame stability. These results provide that the instability due to flash-back behaviour like CIVB phenomenon occurred at rich condition, while the repetition of relighting and extinction caused the oscillation of lean condition near flammable limit. From the analysis of H₂content effects, it is also confirmed that the instability frequency is proportional to the laminar burning velocity at both rich and lean condition.
-
KCI연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
