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Analysis of Factors Effecting Cargo Bay Fire Suppression Using a Fuel Tank Inerting System. Final rept.
| 题名： | Analysis of Factors Effecting Cargo Bay Fire Suppression Using a Fuel Tank Inerting System. Final rept. |
| 作者： | Cavage-W.M. |
| 关键词： | *Air-cargo; *Fire-suppression; *Fuel-tanks.;Aircraft-fires; Fire-safety; Aircraft-compartments; Nitrogen-; Oxygen-concentration; Fire-extinguishers; Containerized-fires; Inert-materials; Gas-generating-systems. |
| 摘要： | Adding the capability of inert gas generation for fuel tank inerting to a commercial transport airplane has the potential to improve fire safety and reduce the weight and complexity of existing cargo bay fire suppression systems. To determine the effectiveness of a potential fuel tank inerting system for use as a cargo bay fire suppression metered system, a single air separation module (ASM) was tested to obtain specific performance points relevant to cargo bay fire suppression. These performance points were then used to calculate the time required to inert a single cargo bay with that inerting system and also to calculate how much time the cargo bay would not be inert using the Onboard Inert Gas Generation System (OBIGGS) with a discharge of halon. The acquired ASM performance data illustrated that an ASM based OBIGGS used for fuel tank inerting would be consistent with the requirements for a cargo bay fire suppression metered agent system. The nitrogen-enriched air (NEA) flow was very sensitive to ASM feed pressure (bleed air pressure) and the NEA flow from the ASM decreases as the static permeate pressure increases (aircraft altitude decreases). As expected, it is easier to inert the cargo bay as pressure altitude increases due to the decrease of gas mass in the compartment. The results of modeling the oxygen concentration with a halon discharge and representative air leakage into the bay to determine time not inert for given conditions illustrated the same date trends. |
| 报告类型： | 科技报告 |
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