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 : 김환호(H. H. Kim) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
김환호(H. H. Kim),김민국(M. K. Kim),정석호(S. H. Chung) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.40
The effect of DC electric fields on the stabilization of the laminar premixed jet flames has been investigated with ground-mesh and in single-electrode configuration. The detachment velocities were measured by varying the applied positive and negative DC voltage at various distance of ground-mesh. The detachment velocity was increased and decreased with the magnitude of negative and positive DC voltage, respectively. As compared to the case of single-electrode configuration, the effect of DC voltage on the variation of detachment velocity with ground-mesh was appreciable. The variation of detachment velocity of premixed jet flame was well correlated by the representative strength of DC electric fields. It was observed that the effect of negative DC electric fields is larger than that of positive field. With qualitative evaluation of electric field, it was shown that the strength exerted on flame zone for negative DC source could be larger than that of for positive one. Consequently, the changes of detachment velocity with variation of applied DC voltage, distance of ground-mesh, and polarity of DC source were explained by the evaluated electric field strength.
-
층류 예혼합 화염의 화염 날림 현상에 미치는 교류 전기장 효과
김환호(H. H. Kim),김민국(M. K. Kim),정석호(S. H. Chung) 한국연소학회 2009 KOSCOSYMPOSIUM논문집 Vol.- No.39
The stabilization of the laminar premixed jet flames has been investigated experimentally by applying the AC electric fields at low frequency which is below 60㎐ in single electrode configuration. The detachment and blow off velocities have been measured by varying the applied AC voltage and frequency. The detachment velocity was decreased with the applied AC electric fields. The normalized velocity was changed linearly with AC voltage. The normalized velocity decreased and increased over certain frequency with AC frequency. Blowoff velocity had minimum value and transition frequency region was observed. Two different regimes were classified within the boundaries of minimum frequency and transition frequency region. In regime L-Ⅰ from 0.1㎐ to minimum frequency, blowoff velocity decreases with the applied frequency and decreasing rate increases. In regime L-Ⅱ from minimum frequency to transition frequency region, blowoff velocity has opposite trend to the regime L-Ⅰ. Ionic wind effect and chemical reaction enhancement are proposed as the possible causes to influence flame stabilization.
-
층류 예혼합 화염 안정화에 미치는 교류 전기장 효과에 관한 실험적 논문
김민국(M. K. Kim),김환호(H. H. Kim),정석호(S. H. Chung) 한국연소학회 2008 KOSCOSYMPOSIUM논문집 Vol.- No.-
The stabilization characteristics of premixed laminar jet flames have been investigated experimentally for stoichiometric methane-air mixture by varying AC electric fields applied to the nozzle with a single-electrode configuration. The detachment velocities either at blowoff or partial-detachment have been measured by varying the applied voltage and frequency of AC. The result showed that the detachment velocity was increased with the applied AC electric fields, such that the flame was attached to the nozzle exit even over the blowoff velocity without having electric fields. There existed four distinct regimes depending on the applied AC voltage and frequency. In the regime of low electric field intensity, the threshold condition of AC electric fields was observed below which the effect of electric fields on the detachment velocity is minimal. In the moderate voltage, the detachment velocity increased linearly with the applied voltage and nonlinearly with the AC frequency. In the high voltage regime, two different regimes depending on the AC frequency were observed. For relatively low frequency, a half frequency of the flame base oscillation as well as the original frequency of applied AC electric fields was induced and the change of detachment velocity was insensitive to the variation of applied voltage. At high frequency regime, the stability of flame was significantly affected by the generation of streamers and the detachment velocity decreased with the applied voltage.
-
다중프로세서 중앙처리장치 유니트 보드의 인터럽트 모듈에 관한 연구
김덕진(D. J. Kim),김현욱(H. U Kim),이재설(J S Lee),김환호(H. H. Kim),유충열(C. Y You) 한국정보과학회 1992 한국정보과학회 학술발표논문집 Vol.19 No.1
본 논문은 다중프로세서 시스템의 중앙처리장치 유니트 보드에서 인터럽트 모듈을 설계하였다. 인터럽트 모듈은 인터럽트 요청기(INT_RQ), 인터럽트 처리기(INT_HA), 인터럽트 중재기(INT_ARB) 및 인터럽트버스 인터페이스, 인터럽트 요청기와 처리기 컨트롤러, 클럭 제너레이터, 인터럽트 버스(INT_B)로 구성하였다. 설계된 각 sub-module의 동작을 VALID LWB 툴을 사용하여 로직 시뮬레이션하여 확인 하였다.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
