- Author
-
Ricciuti, C.
- Title
- Characterization of Confined Fire-Plume-Driven Ceiling Jets.
- Coporate
- Worcester Polytechnic Inst., MA
- Report
-
Thesis
June 1991
145 p.
- Keywords
-
ceiling jets
|
ceilings
|
fire plumes
|
heat transfer
|
temperature
|
walls
- Abstract
- The development of an upper layer in an enclosure fire has notable effects on the ceiling jet. The presence of this hot gas layer increases the temperature in the ceiling jet and the heat transfer to the ceiling. Accurate predicting the characteristics of the confined ceiling jet is important in calculating the time to operation of detection and suppression devices. This thesis examines data from a study of small-scale fire induced confined ceiling jets. These results were obtained from experiments conducted at the National Institute of Standards and Technology, Center for Fire Research, by Vahid Motevalli. The data gathered from these experiments represents a collection of transient and steady-state temperature and velocity measurements of a confined ceiling jet and upper layer. The results from this data were compared to similar experimental data collected by Motevalli and Marks for unconfined ceiling jets. The main objective of this work is to develop better understanding of the characteristics of the confined ceiling jet. This goal is reached through comparison of the confined and unconfined ceiling jet data, quantification of the developing upper layer and analysis of heat transfer to the ceiling.