- Author
-
Yuan, Z. P.
- Title
- Study of a Ceiling Jet Induced by Steady Fire Source Under an Unconfined Ceiling With Beams.
- Coporate
- Worcester Polytechnic Inst., MA
- Report
-
Thesis
May 1994
86 p.
- Keywords
-
ceiling jets
|
beams
|
ceilings
|
experiments
|
temperature
|
standards
|
fire protection
|
temperature profiles
- Identifiers
- multiple beam spacings; fire source
- Abstract
- One of the most challenging problems in fire detection and suppression system design is understanding the characterization of fire-induced ceiling jet flows. Much research, at both basic and engineering levels, have been performed to study ceiling jet flow under a smooth unconfined horizontal ceiling. However, very little work has been done to characterize ceiling jets in the presence of beams forming channels on a ceiling. The primary channel is the region between two parallel ceiling beams where the fire source is located. The secondary channel is the region between two parallel beams, where the fire source is in the adjacent channel. The temperature and velocity profiles of beamed ceiling jets within primary and secondary channels are very important in predicting and designing the response of detectors or sprinklers. In this work, the geometric variables of beam and ceiling, such as beam width, beam depth, beam spacing, and ceiling height, affecting the temperature profiles and maximum temperature of the ceiling jet have been considered and analyzed. The easy-to-use temperature correlation developed in this thesis is helpful for fire protection engineers to calculate the actuation time of heat detector and sprinklers and to install those devices at optimum position within secondary channels of the beamed ceiling configuration.