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Cold Discharge of CF3I in a Simulated Aircraft Engine Nacelle



Jiann C. Yang, Samuel L. Manzello, Marc R. Nyden, M D. Connaghan


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 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 ˚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.
Proceedings Title
Proceedings of the 7th International Symposium- SP 984
Conference Dates
June 16-21, 2003
Conference Title
IAFSS Symposium


Aircraft, Cold temperature, Fire Safety, Fire suppression, Halon alternative


Yang, J. , Manzello, S. , Nyden, M. and Connaghan, M. (2003), Cold Discharge of CF<sub>3</sub>I in a Simulated Aircraft Engine Nacelle, Proceedings of the 7th International Symposium- SP 984, [online], (Accessed April 14, 2024)
Created June 1, 2003, Updated February 19, 2017