- Author
- Cooper, L. Y.
- Title
- Heat Transfer in Compartment Fires Near Regions of Ceiling Jet-Wall Impingement.
- Coporate
- National Bureau of Standards, Gaithersburg, MD
- Sponsor
- American Society of Mechanical Engineers, New York, NY
- Report
- ASME HTD-Vol. 73
- Book or Conf
- Combustion Institute/Eastern States Section. Chemical and Physical Processes in Combustion. Fall Technical Meeting, 1985. November 4-6, 1985. Philadelphia, PA. 42/1-4 pp, 1987 AND American Society of Mechanical Engineers. National Heat Transfer Conference in Sessions on Heat and Mass Transfer in Fire, 24th. ASME HTD-Vol. 73. August 9-12, 1987. Pittsburgh, PA, Kulkarni, A. K. and Jaluria, Y. Editor(s), 57-62 pp, 1987, 1987
- Keywords
- heat transfer
- Identifiers
- heat transfer
- Abstract
- As a fire grows in an enclosure, the elevated temperature air and products of combustion which leave the zone of the burning object form a fire plume and are convected upward by buoyancy. When the upward movement of the plume constituents are blocked by the ceiling (a distance H, above the fire) they spread radially outward forming a relatively thin turbulent ceiling jet. Depending on the proximity, D, of vertical surfaces, this ceiling jet either loses most of its momentun far out on its trajectory (in the case of an expansive smooth ceiling with large D/H surfaces), or can be expected to interact vigorously with these bounding surfaces (in the case of lower aspect ratio spaces with D/H of the order of 1) by forming a downward wall jet flow which is eventually turned back upward by its own buoyancy. The flow scenario for the latter case is depicted in Figure 1.