분기관을 가진 연소 챔버 내 압력변동 특성에 관한 실험적 연구

다국어 초록 (Multilingual Abstract)

An experimental study using the combustor with branch tube was conducted in order to model the industry combustor with FGR (flue gas recirculation) system and to study a thermo-acoustic instability generated by a branch tube. The branch tube is a structure used to modify a system geometry and then to change its pressure field, and the thermo-acoustic instability, usually occurs in a confined geometry, can result in serious problems on industrial combustors. Thus understanding of the instability created by modifying geometry of combustor is necessary to design and operate combustor with FGR system. Pressure fluctuation in the combustion chamber was observed according to diameter and length of branch and it was compared with the solution of 1-D wave equation. It was found that branch tube affects the pressure field in the combustion chamber, and the pressure fluctuation in the combustion chamber was reduced to almost zero when phase difference between an incipient wave in the combustion chamber and a reflected wave in the branch tube is π at the branch point. Also, the reduction of pressure fluctuation is irrespective of the installed height of branch tube if it is below h<SUP>*</SUP>=0.9 in the close-open tube and open-open tube.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험 장치 및 방법
• 3. 실험 결과 및 고찰
• 4. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 이홍선, "분기관을 이용한 피스톤 펌프의 압력 맥동에 관한 연구" 한국생산제조시스템학회 16 (16): 117-124, 2007

2 Denis Veynante, "Theoretical and Numerical Combustio" Edwards 376-394, 2001

3 Stewart, G. W., "The Tube as a Branch of an acoustic conduit : The Special Case of the Quincke Tube" 27 : 494-498, 1926

4 Steele, R. C., "Passive Control of Combustion Instability in Lean Premixed Combustors" (122) : 412-419, 2000

5 Putnam, A. A., "Organ-Pipe Oxcillations in a Flame-Filled Tube" 4 : 129-, 1953

6 Kim, H. K., "NO Reduction in 0.03-0.2MW Oxy-Fuel Combustor Using Flue Gas Recirculation Technology" 31 : 3377-3384, 2007

7 Selamet, A., "Modified Herschel-Quincke Tube:Attenuation and Resonance for n-Duct Configuration" 102 (102): 164-169, 1997

8 Huzayyin, A. S., "Laminar Burning Velocity and Explosion Index of LPG-air and Propane-air Mixtures" 87 : 39-57, 2008

9 Balstasar, J., "Flue Gas Recirculation in a Gas Fired Laboratory Furncace : Measurements and Modeling" 76 : 919-926, 1997

10 배명환, "FGR 시스템 보일러의 배기 배출물에 미치는 재순환 배기의 영향에 관한 연구" 대한기계학회 31 (31): 405-415, 2007

11 McManus, K. R., "A Review of Active Control of Combustion Instabilities" 19 : 1-29, 1993

12 Hathout, J. P., "A Model-Based Active Control Design for Thermoacoustic Instability" 132 : 99-138, 1998