배연창 조건이 구획실 화재 현상에 미치는 영향에 대한 전산해석적 연구 = Numerical investigation on the effects of smoke vent conditions on compartment fire phenomena

다국어 초록 (Multilingual Abstract)

In this study, the effects of smoke vent conditions on compartment fire phenomena were numerically investigated using fire dynamics simulator. Three smoke vent types (Casement, Overhang, and Middle) and three opening widths (0.72 m, 1.44 m, and 2.16 m) were analyzed. The minimum
opening angles required to satisfy an effective area of 1 ㎡ were applied. The numerical method was validated based on the previous experimental data for the temperature and velocity of vent flow. Overall, the Casement showed a higher smoke layer height, a lower smoke layer temperature, and a greater mass flow rate of the vent flow, especially under a large opening width condition. Flow coefficients estimated from the numerical results were about 0.60 ~ 0.68 for the Casement, 0.19 ~ 0.59 for the Overhang, and 0.54 ~ 0.64 for the Middle. The present results indicate that, even under the same effective area condition, the smoke vent type, opening width, and opening angle significantly affect the compartment fire phenomena and should therefore be carefully considered in fire safety design.

목차 (Table of Contents)

• 제1장 서론 1
• 1.1 연구 배경 1
• 1.2 기존 연구 동향 3
• 1.3 연구 목적 및 범위 9
• 제2장 전산해석 조건 및 방법 10
• 2.1 전산해석 조건 10
• 2.2 전산해석 방법 16
• 2.2.1 격자 크기 선정 16
• 2.2.2 배연창의 설치 기준 19
• 2.2.3 배연창 형태에 따른 유효 면적 계산 방법 19
• 제3장 전산해석 결과 및 분석 22
• 3.1 구획실 내 온도 분포 22
• 3.2 개구부 유동 속도 분포 27
• 3.3 연기층 높이 32
• 3.4 연기층 온도 34
• 3.5 개구부 질량 유량 36
• 제4장 결론 42