The continuous search for alternatives to halons as fire suppressants, necessitated by the Montreal Protocol ban on ozone depleting substances, has yielded a few potential replacements. However, these chemically acting agents still pose unresolved toxicity questions and/or are not as effective as halons. This Phase I proposal offers a revolutionary approach to suppress fire by exposure to spectrally selective light. To meet this objective, a four-task work plan is proposed. It includes: (1) Prospective light wavelength(s) for fire suppression will be identified from spectroscopic investigation of light emission from a corona discharge induced by electromagnetic pulse which has already exhibited fire extinction capabilities; (2) Computer modeling will be utilized to assist in the selection of the most promising wavelength(s); (3) Hydrocarbon flames established over a Bunsen burner and/or a counterflow apparatus will be exposed to laser light at the selected wavelengths. Fire suppression will be quantified in terms of reduction is burning velocity (Bunsen) and/or stain rate (counterflow); and (4) A conceptional design of a fire suppression prototype will be rendered based on the experimental and modeling results. Successful demonstration of the principle along with a fundamental understanding of the underlying mechanisms for fire suppression by light will provide a technical foundation for a comprehensive Phase II R&D, leading to a design and construction of a prototype for field demonstration.
Benefits: If successful, the proposed approach will constitute a major breakthrough in fire fighting technology. It will not only eliminate the use of chemicals but, will also drastically reduce the response time. This technology will revolutionize the fire suppression industry. It will find a widespread, potentially unlimited, commercial use including both military and civilian applications. In particular, it will offer extremely effective means to fight or eliminate altogether fires on aircraft, ships, space vehicles and other expensive platforms prone to catastrophic accidents.
