- Author
- Evans, D. D.
- Title
- Plume Flow in a Two-Layer Environment.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Book or Conf
- American Society of Mechanical Engineers. Fire Dynamics and Heat Transfer. National Heat Transfer Conference, 21st. July 24-28, 1983., American Society of Mechanical Engineers, New York, Seattle, WA, Quintiere, J. G., Alpert, R. L. and Altenkirch, R. A., Editors, 89-96 p., 1983
- Keywords
- buoyant plumes
- Abstract
- Methods are developed to determine axial gas flow conditions within a weakly buoyant plume that passes from an ambient quiescent environment, in which the plume originates, to an upper layer at elevated temperature. Emphasis is placed on the development of an easily calculated approximation. The methods are appropriate for inclusion in two layer models of enclosure fires. In particular, they may provide a means of calculating starting conditions for the ceiling jet flow and actuation times for thermally sensitive automatic sprinkler heads located near the compartment ceiling. Calculated results are compared with measurements made in a 1.22m diameter cylindrical enclosure.