세미나 및 이벤트
A Theoretical and Experimental Study of Preferential-Diffusion ...
세미나 날짜
2000-10-18
작성자
윤두희
작성일
2000-10-18
조회
995
1.제목: A Theoretical and Experimental Study of Preferential-Diffusion / Stretch Interactions of Laminar Premixed Flames
2.연사: Oh Chae Kwon (The University of Michigan, Research Follow)
3.일시: 2000년 10월 4일 (수요일) 오후 4시
4.장소: 301동 1512호
5.내용:
Recent work shows that preferential-diffusion/stretch interactions of laminar premixed flames are sufficiently robust to affect the stability of practical strongly-turbulent flames. In addition, past measurements of laminar burning velocities should be re-assessed because there generally was no attempt to control flame stretch. Finally, the sensitivity of laminar premixed flames to stretch (represented by the Markstein number) should be studied to better understand and model the properties of laminar premixed flames. Motivated by these considerations, an experimental and computational study of preferential- diffusion/stretch interactions for laminar premixed flames was carried out.
Considering outwardly-propagating spherical laminar premixed flames, laminar burning velocities of fuel-vapor/oxygen/nitrogen flames and hydrogen/oxygen/diluent (nitrogen, argon or helium) flames were measured for various values of stretch, fuel-equivalence ratios and pressures. The measurements were reduced to find fundamental unstretched laminar burning velocities and Markstein numbers. The measurements were also used to evaluate corresponding numerical simulations of the experimentally-observed flames, based on contemporary detailed H2/O2 reaction mechanisms.
6. 연사 약력 :
1990 Seoul National University, Aeronautical Engineering, B.S.
1994 Seoul National University, Aerospace Engineering, M.S.
2000 The University of Michigan, Aerospace Engineering, Ph.D.
Present The University of Michigan, Aerospace Engineering, Research Follow
7. 연락처 : 기계항공공학부 윤영빈 교수 (전화 : 880-1904)
2.연사: Oh Chae Kwon (The University of Michigan, Research Follow)
3.일시: 2000년 10월 4일 (수요일) 오후 4시
4.장소: 301동 1512호
5.내용:
Recent work shows that preferential-diffusion/stretch interactions of laminar premixed flames are sufficiently robust to affect the stability of practical strongly-turbulent flames. In addition, past measurements of laminar burning velocities should be re-assessed because there generally was no attempt to control flame stretch. Finally, the sensitivity of laminar premixed flames to stretch (represented by the Markstein number) should be studied to better understand and model the properties of laminar premixed flames. Motivated by these considerations, an experimental and computational study of preferential- diffusion/stretch interactions for laminar premixed flames was carried out.
Considering outwardly-propagating spherical laminar premixed flames, laminar burning velocities of fuel-vapor/oxygen/nitrogen flames and hydrogen/oxygen/diluent (nitrogen, argon or helium) flames were measured for various values of stretch, fuel-equivalence ratios and pressures. The measurements were reduced to find fundamental unstretched laminar burning velocities and Markstein numbers. The measurements were also used to evaluate corresponding numerical simulations of the experimentally-observed flames, based on contemporary detailed H2/O2 reaction mechanisms.
6. 연사 약력 :
1990 Seoul National University, Aeronautical Engineering, B.S.
1994 Seoul National University, Aerospace Engineering, M.S.
2000 The University of Michigan, Aerospace Engineering, Ph.D.
Present The University of Michigan, Aerospace Engineering, Research Follow
7. 연락처 : 기계항공공학부 윤영빈 교수 (전화 : 880-1904)
