층류 동축류 제트 부상화염에서의 자기진동에 관한 연구

다국어 초록 (Multilingual Abstract)

A study on laminar jet flames in coflow air diluted with helium has been conducted to investigate selfexcitations for various propane mole fractions and nozzle exit velocities. The stability map was represented as a function of nozzle exit velocity and fuel mole fraction for propane. The results show that two types of self-excitation were observed : (1) buoyancy-driven self-excitation (hereafter called BDSE) and (2) Lewisnumber induced-self-excitation coupled with (1) (hereafter called LCB) near extinction limit for 9.4 ㎜ nozzle diameter. It was shown that with 0.95 ㎜ nozzle diameter, Lewis-number-induced self-excitation (hereafter LISE) and BDSE could be separated. The differences between the two self-excitations were shown and discussed.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 실험방법
• 3. 결과 및 논의
• 4. 결론
• 참고문헌

참고문헌 (Reference)

1 Lee, B. J., "Stabilization of Lifted Tribrachial Flames in a Laminar Nonpremixed Jet" 109 : 163-182, 1997

2 Kurdyumov., "Stabilization and onset of oscillation of an edge-flame in the nearwake of a fuel injector" 31 : 909-917, 2007

3 S. H. Yoon., "Self-excitation in laminar lifted flames diluted with nitrogen" 158 : 1960-1969, 2011

4 Kurdyumov., "Radiation losses as a driving mechanism for flame oscillations" 29 : 45-52, 2002

5 Chung, S. H., "On the Characteristics of Laminar Lifted Flames in a Nonpremixed Jet" 86 : 62-72, 1991

6 Won, S. H., "Normal and Microgravity Experiment of Oscillating Lifted Flames on Coflow" 29 : 2002

7 M. Furi., "Non-premixed jet flame pulsations near extinction" 28 : 831-838, 2000

8 Won, S. H., "Lifted Flame Stabilization in Developing and Developed Regions of Coflow Jets for Highly Diluted Propane" 28 : 2093-2099, 2000

9 W. J. Lee., "Lewis-number-induced and buoyancy-driven self-excitations in nitrogen-diluted laminar nonpremixed free-jet flames" 112 : 366-374, 2013

10 Wang, H., "Law, High-Temperature Combustion Reaction Model of H2/CO/C1-C4 Compounds"

11 S. H. Yoon., "Experimental study on self-excitations in nitrogen-diluted laminar lifted butane flames" 91 : 51-60, 2012

12 Kurdyumov., "Dynamics of an edge flame in a mixing layer" 139 : 329-339, 2004

13 Kee, R. J., "A Fortran program for modeling steady laminar one-dimensional premixed flames" Sandia National Laboratories 1993