장애물이 있는 챔버 내부의 정전기 방전 에너지에 의한 가스 폭 발시 초기화염과 화염전파 특성에 대한 PIV 계측

다국어 초록 (Multilingual Abstract)

In order to investigate the effects of three different electrostatic discharge energies on gas explosions, a high-speed PIV system has been applied. The present study paid attention to the flame initiation by the gas explosions and its propagation at the existence of an obstacle within a chamber. Three different ignition energies such as 0.56 mJ, 52.87 mJ and 112.5 mJ were used. It is found that the ignition kernel is bent by the electrostatic discharge during the flame initiation. Tangential velocities of unburnt mixture ahead of initially propagating flame fronts are increased with increasing ignition energy, which makes the flame propagation faster before it reaches the obstacle. Although the flame speed was found to be less sensitive to the ignition energies, the flame developments were different. The effects of the energies on explosion pressures were also discussed.

목차 (Table of Contents)

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

참고문헌 (Reference)

1 성재용, "표준 영상에 의한 FFT 기반 상호상관 PIV 알고리즘의 불확도 해석" 한국가시화정보학회 3 (3): 71-78, 2005

2 성재용, "단일 카메라를 이용한 이상유동 기포율 측정방법의 개발과 응용" 대한기계학회 31 (31): 904-911, 2007

3 Moen, I. O., "Transition to Detonation in a Large Fuel- Air Cloud" 61 : 285-291, 1985

4 Ono, R., "Measurements of OH Density and Gas Temperature in Incipient Spark- Ignited Hydrogen-Air Flame" 152 : 69-79, 2008

5 Phylaktou, H., "Gas Explosions in Long Closed Vessels" 77 : 27-39, 1991

6 McKay, D. J., "Flame-Jet Ignition of Large Fuel-Air Clouds" 1338-1353, 1988

7 Zhen, G., "Effects of Ignitors and Turbulence on Dust Explosions" 10 : 317-324, 1997

8 Hjertager, B. H., "Concentration Effects on Flame Acceleration by Obstacles in Large-Scale Methane-Air and Propane- Air Vented Explosions" 62 : 239-256, 1988

9 Bradley, D., "Burning Velocities, Markstein Lengths, and Flame Quenching for Spherical Methane-Air Flames : A Computational Study" 104 : 176-198, 1996