Simple Estimation Model on Ceiling Temperature and Velocity of Fire Induced Flow under Ceiling

Fire Science and Technology

Osami Sugawa¹ 

[1] Center for Fire Science and Technology, Science University of Tokyo, Japan

关键词: Ceiling jet;    Excess temperature;    Velocity;    Corner fire;    Wall fire;    Unconfined ceiling;    Sloped ceiling;    t²-fire;    Operation time;    RTI model;   

DOI  :  10.3210/fst.21.57

学科分类：环境科学（综合）

来源: Tokyo University of Science * Center for Fire Science and Technology for Building

【 摘 要 】

References(11)Cited-By(4)A new simple estimation model was described on excess temperature and velocity of ceiling jet under the flat, horizontal and sloped ceiling of an unconfined room from a t²-fire. This simple model was composed of ceiling height (H), distance along ceiling from the impinging point (r), and heat release rate (Q) which was given as a t²-fire. This model was verified by the experimental data which were conducted using at² model fire with ceiling heights of 2m, 2.1m, 4m, 8m, 15m and 20m. Flat and sloped ceiling with smooth surface was also used as a model ceiling, and those experimental data were used to verify the model. This model can deal with the cases of a corner fire and a wall fire for its early stages, and also verified by the data of corner and wall fires. The model for excess temperature and velocity with suitable RTI gave the estimation on the operation time of heat detector and sprinkler.

【 授权许可】

Unknown