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Experimental study of an aircraft fuel tank inerting system

Chinese Journal of Aeronautics 2015年第2期28卷 394-402页

作者： Cai Yan Bu Xueqin Lin Guiping Sun Bing Zeng Yu Li Zixuan School of Aeronautic Science and Engineering Beihang University

In this work, a simulated aircraft fuel tank inerting system has been successfully estab- lished based on a model tank. Experiments were conducted to investigate the influences of different operating parameters on the inerting effectiveness of the system, including flow rate of the inert gas （nitrogen-enriched air）, inert gas concentration, fuel load of the tank and different inerting approaches. The experimental results show that under the same operating conditions, the time span of a complete inerting process decreased as the flow rate of inert gas was increased; the time span using the inert gas with 5% oxygen concentration was much longer than that using pure nitrogen; when the fuel tank was inerted using the ullage washing approach, the time span increased as the fuel load was decreased; the ullage washing approach showed the best inerting performance when the time span of a complete inerting process was the evaluation criterion, but when the decrease of dissolved oxygen concentration in the fuel was also considered to characterize the inerting effective- ness, the approach of ullage washing and fuel scrubbing at the same time was the most effective.

关键词： Flow rate Fuel tank Inert Oxygen concentration time span Ullage

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