http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
축소반응기구를 이용한 DME 엔진의 연소 및 배기 특성에 관한 수치 해석
류봉우(Bong Woo Ryu),오윤중(Yun Jung Oh),박성욱(Sung Wook Park),이창식(Chang Sik Lee) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.41
This study performed the numerical simulation of chemical reaction mechanism for ignition and combustion phenomena of dimethyl ehter (DME) in a diesel engine using KIVA-CHEMKIN code. The reduced reaction mechanism which was consisted of 44 species and 166 reactions was obtained from the base detailed reaction mechanism which was composed of 79 species and 351 reaction steps. The spray combustion and emission characteristics when applying the reduced reaction mechanism were validated by comparing with applying the detailed reaction mechanism and the calculation time reduction ratio was also evaluated. The calculation accuracy of the reduced reaction mechanism was good agreement with that of the detailed reaction mechanism for combustion and emission characteristics under various injection timings and the calculation time was reduced about 45% at the conditions that the chemical reaction was frequently generated.
흡기가열을 이용한 가솔린 압축착화 엔진의 연소 및 배기특성 모델링
최민기(Mingi Choi),오윤중(Yunjung Oh),류봉우(Bong Woo Ryu),이창식(Chang Sik Lee),박성욱(Sungwook Park) 한국연소학회 2011 KOSCOSYMPOSIUM논문집 Vol.- No.43
This paper presents numerical study on combustion and emissions characteristics of GDICI(gasoline Direct Injection Compression Ignition) engine using intake preheating. Numerical modeling was conducted by using the KIVA-3V Release2 code. In addition, Chemkin Chemistry solver was integrated into KIVA code to simulate the ignition and combustion precesses in order to predict combustion and exhaust emissions characteristics. The fuel was modeled using PRF mechanims to simulate the fuel oxidation process. To achieve gas pressure in cylinder and emissions characteristics, the experiments were performed on a single-cylinder engine. The simulation results agreed well with the experimental data.
권순익(Soon-Ik Kwon),김상진(Sang-Jin Kim) 한국산업융합학회 2013 한국산업융합학회 논문집 Vol.16 No.1
Burned gas of methane-air mixtures with water vapor have been analysed to study the exhaust emission using gas-chromatography and computation. The computations were carried out for the gas analysis using premix code of Chemkin program to compare the experimental results. The quantity of water vapor contained were changed 5% and 10% of total mixtures, and equivalence ratio of mixtures between 0.6 and 1.2 were tested under the ambient temperature 323K and 373K. The results showed CO, CO₂ decreased and H₂ increased by increasing the water contents. The CO increased and CO₂ decreased by increasing the ambient temperature. The CO₂ shows the maximum product at equivalence ratio 1.0, in otherwise the CH₄ produced the minimum values in the same range. The results showed little difference between these two methods.
물 혼합에 의한 메탄-공기 예혼합기의 연소(2)-연소속도 비교
권순익(Soon-Ik Kwon) 한국산업융합학회 2009 한국산업융합학회 논문집 Vol.12 No.3
Burning velocity of methane-air mixtures with water vapor have been measured to study the process of flame propagation using schlieren photographs and computation. The computations were carried out for the burning velocity using premix code of Chemkin program to compare the experimental results. The quantity of water vapor contained were changed 5% and 10% of total mixtures, and equivalence ratio of mixtures between 0.8 and 1.2 were tested under the ambient temperature 323K and 373K. The results showed little difference between these two methods, the burning velocity was decreased by increasing the water vapor contents due to the interruption of flame development. And, the effect of ambient temperature was less significant by increasing the water contents on the burning velocity.
고압 완전혼합반응기(PSR)내의 메탄-공기 희박 예혼합 연소의 NO<SUB>x</SUB> 생성에 관한 모델링 연구
박정규(Jungkyu Park),김현(Hyun Kim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this study the predictions of NOx in methane-air lean premixed combustion in HP-PSR were carried out by using GRI mech 3.0 and Zeldovich, nitrous oxide, prompt, and NNH NO formation mechanism. Also the comparison of the prediction to HP-JSR experimental data of Rutar for the validation of the model. This study concerns about the importance of the chemical pathways. The chemical pathway most likely to form the NO in lean-premixed combustion was investigated. Results obtained with the 4 different NO mechanisms are compared.