Title of Paper:Experimental comparison between aircraft fuel tank inerting processes using NEA and MIG

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Affiliation of Author(s):航空学院

Journal:CHINESE JOURNAL OF AERONAUTICS

Key Words:Dissolved oxygen Experiment Fuel tanks Inert gases Mixed Inert Gas (MIG) Nitrogen-Enriched Air (NEA) Oxygen

Abstract:Fuel tank inerting technologies are able to reduce the fire risk by injection of inert gas into the ullage or fuel, the former called ullage washing and the latter fuel scrubbing. The Green On-Board Inert Gas Generation System (GOBIGGS) is a novel technology based on flameless catalytic combustion, and owning to its simple structure and high inerting efficiency, it has received a lot of attentions. The inert gas in the GOBIGGS is mainly comprised of CO2, N-2, and O-2 (hereinafter, Mixed Inert Gas (MIG)), while that in the On-Board Inert Gas Generation System (OBIGGS), which is one of the most widely used fuel tank inerting technologies, is Nitrogen Enriched Air (NEA). The solubility of CO2 is nearly 20 times higher than that of N-2 in jet fuels, so the inerting capability and performance are definitely disparate if the inert gas is selected as NEA or MIG. An inerting test bench was constructed to compare the inerting capabilities between NEA and MIG. Experimental results reveal that, if ullage washing is adopted, the variations of oxygen concentrations on the ullage and in the fuel are nearly identical no matter the inert gas is NEA or MIG. However, the ullage and dissolved oxygen concentrations of MIG scrubbing are always higher than those of NEA scrubbing. (C) 2018 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.

ISSN No.:1000-9361

Translation or Not:no

Date of Publication:2018-07-01

Co-author:Shao, Lei,Li, Chaoyue,TealC,Wang, Chenchen,Pan, Jun

Correspondence Author:刘卫华,TealC