A Simple Model for Predicting Fire Growth Behavior of Flexible Polyurethane Slab in a Compartment

• 발행기관: 한국화재소방학회
• 저자명: Yimeng Cui Kazunori Harada, Daisaku Nii
• 간행물 정보: 『International Journal of Fire Science and Engineering』Vol. 39, No. 2, 63~81쪽, 전체 19쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 2025.06.30

국문 초록

Predicting the characteristics of fire spread in buildings is crucial for fire safety design. This paper presents a simple model for predicting fire growth behavior of a flexible polyurethane slab in a compartment. The model consists of a fire growth model and a two-l ayer zone model. As for the fire growth model, six flame geometries were proposed to calculate the radiation from flame and the flame impingement on the ceiling. The smoke layer temperature and radiation interexchange were calculated by an improved two-layer zone model for smoke transport. As a result, radiation feedback to polyurethane slab was calculated in terms of internal radiation from flame and external radiation from extended flame, heated ceiling surfaces and the smoke layer. The effect of external radiation is considered to predict the increase in fire spread rate and heat release rate from the fire source. The accuracy of the model was verified by comparing calculated values with experimental values carried out by Akao et al. It was found that the fire growth behavior was well predicted when the ceiling is high, and slightly over predicted when the ceiling is low.

목차

1. Introduction

2. Calculation Methods

3. Model Validation

4. Conclusions

References

키워드

Fire growth Heat release rate (HRR) Flame extension Radiative heat flux Radiation feedback Two-layer zone model