Codification of Wind Loads on Buildings Using Bluff Body Aerodynamics and Climatological Data Bases.

Published

April 24, 2001

Author(s)

Jiann C. Yang, Marc R. Nyden, Samuel L. Manzello

Abstract

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.

Proceedings Title

Halon Options Technical Working Conference. Proceedings. HOTWC 2001

Conference Dates

April 24-26, 2001

Conference Location

Albuquerque, NM

Pub Type

Conferences

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Local Download

Keywords

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

Citation

Yang, J. , Nyden, M. and Manzello, S. (2001), Codification of Wind Loads on Buildings Using Bluff Body Aerodynamics and Climatological Data Bases., Halon Options Technical Working Conference. Proceedings. HOTWC 2001, Albuquerque, NM, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916924 (Accessed May 15, 2026)

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