- Author
-
Sugawa, O.
|
Oka, Y.
|
Ueno, H.
|
Hara, Y.
- Title
- Visualization of a Counter-Flow Field in a Clean Room.
- Coporate
- Science University of Tokyo, Japan
Tobishima Corp., Ltd., Tokyo, Japan
- Keywords
-
clean room fires
|
flow fields
|
smoke
|
model fires
- Abstract
- [ABSTRACT IN ENGLISH] Experimental study was conducted in the flow field of a clean room subject to a clean room fire. The counter-flow which was caused by downward flow and upward current from a model fire source was visualized using two kinds of smoke. A point source or a line fire source was adopted as a model fire source, respectively. While the buoyancy force depends on the heat release rate, hot current which included smoke from the model fire soruce rose against down flow and reached at least 2m height in this experiment. This updraft urrent upon containing the down flow was observed to form an umbrella shape. Most of the air, floor and walls in the clean room were contaminated with combustion particle within a few seconds.