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Cold Discharge of CF3I in a Simulated Aircraft Engine Nacelle.

pdf icon Cold Discharge of CF3I in a Simulated Aircraft Engine Nacelle. (604 K)
Yang, J. C.; Nyden, M. R.; Manzello, S. L.

Halon Options Technical Working Conference. Proceedings. HOTWC 2001. Sponsored by: University of New Mexico, Fire Suppression Systems Assoc., Fire and Safety Group, GlobeTech, Inc., Halon Alternative Research Corp., Hughes Associates, Inc., Kidde, plc., Modular Protection, Corp., Next Generation Fire Suppression Technology Program, Sandia National Laboratories, Summit Environmental Corp., Inc. and 3M Specialty Materials. April 24-26, 2001, Albuquerque, NM, Daniels, B. L.; Cole, D. G., Editor(s)(s), 64-71 pp, 2001.

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halon alternatives; aircraft engines; nacelle fires; aircraft safety; fire safety; temperature; fire suppression; halons


An aircraft engine nacelle simulator was built to study the dispersion behavior of CF3I, a potential halon 1301 (CF3Br) replacement, at an extremely cold temperature (nominally -40 deg C). The experimental fixture consists of a simulated engine nacelle with baffles, an agent release port, observation windows, and two measurement locations. The simulator has a configuration and dimensions commensurate with a typical small engine nacelle. The entire facility was placed inside a large environmental test chamber. Agent discharge experiments were conducted at -40 deg C. The dispersion of CF3I was assessed by measuring the concentration at the two measurement locations in the simulator using fiber-optic-based UV spectrometers. Baseline agent dispersion performance was also established at room temperature. Compared to the measurements obtained at room temperature, there was a significant reduction in the agent concentration in the cold temperature release, and a fire suppression system designed based on room-temperature test data may fail to provide adequate fire protection.