- Author
- Evans, D. D. | Morehart, J.
- Title
- Investigation of the Effects of a Stratified Two Layer Environment on Fire Plume Temperatures.
- Coporate
- National Bureau of Standards, Gaithersburg, MD California Institute of Technology, Pasadena, CA
- Book or Conf
- American Society of Mechanical Engineers and Japan Society of Mechanical Engineers. Proceedings of the 1987 ASME-JSME Thermal Engineering Joint Conference. Volume 1. March 22-27, 1987, American Society of Mechanical Engineers, New York, Honolulu, HI, Marto, P. J.; Tanasawa, I., Editors, 381-386 p., 1987
- Keywords
- fire plumes | high temperature gases
- Identifiers
- suppression; stratified warm gas layer
- Abstract
- A layer of gas at elevated temperature accumulates below the ceiling of a room during a fire. This layer affects fire plume and ceiling jet flows, heat transfer to the ceiling material, and ultimately detector (suppression system) response time. This paper experimentally examines the effects of a stratified warm gas layer on plume flow temperatures originating from a source located in an ambient lower layer. Measurements of spatial distributions of temperature at steady state are presented for a confined 1.2 m diameter cylindrical ceiling configuration. Encouraging agreement is found between experimental temperature measurements and predictions by two existing models for describing temperatures in this two layer environment.