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RISS 인기검색어
- 검색키워드
- 저자 : 심규진(K. J. Shim) (검색결과 14 건)
- 무료
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심규진(K. J. Shim),이중섭(C. S. Yi),악바르 완다(Wanda Ali Akbar),정한식(H. S. Chung),정효민(H. M. Jeong),김무근(M. G. Kim) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Nowadays, study about hydrogen fuel which consist of hydrogen extraction and reforming processes, fuel cell equipment, and receptacle are flourishing all over the world. Currently, Korea hydrogen station is still underdeveloping. And also the most important part which is hydrogen compressor has not been developed. Snubber is one of the important parts in hydrogen compressing system. It is installed before and after reciprocating hydrogen compressor. Snubber has two functions. One is making down pulsation waveform. Because pressure hydrogen gas where is after passing through reciprocation compressor part has high pulsation waveform, so this waveform has to decline. And the other function is precipitating alien substances to outside. Normally, even if 99.99% hydrogen gas is still containing alien substance. Buffer is set up inside snubber and the waveform will hit buffer. This snubber study uses CFD analysis, then it compares between with-buffer snubber and without-buffer snubber.
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이경환(G. H. Lee),심규진(K. J. Shim),이용훈(Y. H. Lee),정한식(H. S. Chung),정효민(H. M. Jeong) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The study about hydrogen fuel which consist of hydrogen extraction and reforming process, fuel cell equipment, and receptacle are flourishing all over the world. Currently, Korean hydrogen station is still underdeveloping. And also the most important part which is hydrogen compressor has not been developed. Snubber is one of the most important parts inhydrogen compressing system. It has installed reciprocating hydrogen compressor. One of these components is snubber which has function to reduce pulsation waveform and to remove the impurities in the hydrogen gas. Therefore, a snubber has a buffer. It is an inclined plate, attached inside snubber. The best snubber is the one which has the least pressure loss and the most pressure amplitude reduction. Furthermore, investigating geometric optimum size of with-buffer snubber has been done by numerical analysis approach.
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이중섭(C. S. Yi),심규진(K. J. Shim),이용훈(Y. H. Lee),정한식(H. S. Chung),정효민(H. M. Jeong) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This research is focused on the application for the catalytic converter in the motorcycle engine. Present research model type is monolithic catalytic converter and this type has been widely used for satisfaction and the regulations of pollutant emissions in automobiles. The flow characteristics in a single monolith automotive catalytic converter were investigated by using a computational simulation method. The numerical mode with a general cartesian coordinates system is assumed as the steady and unsteady state, incompressible flow and κ - ε standard turbulence model. The inlet boundary condition of catalytic converter is assumed as a uniform distributed flow and it was varied from 2m/s to 20m/s. Also, boundary condition of unsteady state was a pressure condition by the experimental result. There has no chemical reaction in this study, so we discuss only to the effect of flow uniformity in the catalyst converter. Simulation results lead us to the conclusion that the fluid uniformity of megaphone type catalytic converter is higher than that of a base type one. By comparing with various types, megaphone type has more suitable for applicable to motorcycle.
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