The Effects of Air-Borne Water Mist on a Forced Convection Boundary Layer Flame over a Non-Charring Solid

Abstract

This report presents preliminary results of an experimental study of water mist suppression of forced flow boundary layer flames over a non-charring solid, where fine water mist was introduced with the incoming air. In this configuration, extinguishment at high mist flow rates is achieved only by flame blow-off. With small droplets (^5O micrometer) at low mist flow rates, the time-averaged local burning rate seems to be suppressed in the leading section and enhanced downstream. A comparison of the burning rate and temperature data between tests with mist and tests with nitrogen dilution suggest that this enhancement in burning rate is caused by mist-induced turbulence.

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Document Details

Document Type
Technical Report
Publication Date
May 30, 2003
Accession Number
ADA416497

Entities

People

  • Chuka C. Ndubizu
  • Patricia A. Tatem
  • Ramagopal Ananth

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Burning Rate
  • Chemistry
  • Combustion
  • Dilution
  • Fire Safety
  • Fire Suppression
  • Fires
  • Flow Rate
  • Heat Energy
  • Latent Heat
  • Layers
  • Leading Edges
  • Measurement
  • Military Research
  • Temperature Gradients

Readers

  • Aerosol Science/Aerosol Physics
  • Fire Suppression Systems Design.
  • Fluid Mechanics and Fluid Dynamics.