- Author
- Yang, J. C. | Manzello, S. L. | Nyden, M. R. | Connaghan, M. D.
- Title
- Cold Discharge of CF3I in a Simulated Aircraft Engine Nacelle.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD Army CECOM Research, Fort Belvoir, VA
- Book or Conf
- Fire Safety Science. Proceedings. Seventh (7th) International Symposium. International Association for Fire Safety Science (IAFSS). June 16-21, 2003, International Association for Fire Safety Science, Boston, MA, Worcester, MA, Evans, D. D., Editors, 715-726 p., 2003
- Keywords
- aircraft engines | halon alternatives | nacelle engines | fire suppression
- Abstract
- An aircraft engine nacelle simulator was built to study the dispersion behavior of CF3I, a potential Halon 1301 (CF3Br) replacement, at temperatures below -22 deg C (normal boiling point of CF3I). 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 peak 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 at -40 dec C.