Analysis of the influence of day and night temperature difference on oxygen concentration in ullage space of fuel tank

Author:

Zhang Ruihua,Liu Weihua

Abstract

Purpose Determining the variation law of the oxygen concentration in the ullage space of the fuel tank is the key to the design of the inert system. Among various factors affecting the oxygen concentration in the ullage space of the fuel tank, the temperature difference between day and night shows particular importance while relevant analysis and calculation are scarce. Design/methodology/approach This study establishes a theoretical simulation model of the central wing fuel tank of an aircraft according to the relevant provisions of day-night temperature variation in FAR25 airworthiness regulations, verifies the model with the existing experimental data and discusses the corresponding relationship between the oxygen concentration in the ullage space of the fuel tank and the day-night temperature difference. The influence of day and night temperature difference, fuel type, fuel load rate, initial oxygen concentration, dissolved oxygen evolution and other factors on the oxygen concentration in the ullage space of the fuel tank were analyzed, and the limit of initial oxygen concentration of the fuel tank before the shutdown at night meeting the requirements of the airworthiness provisions was proposed. Findings The results show that the temperature difference between day and night, fuel load rate, initial oxygen concentration and other factors have different effects on the oxygen concentration in the ullage space of fuel tank. The initial oxygen concentration limit before shutdown shall be 2% below the 12% oxygen concentration stipulated by FAA. Research limitations/implications The research results in this paper will be of good reference value to the design of the inert system and the calculation of the flammability exposure evaluation time. This paper aims to be good reference of the design of the inert system and the calculation of the flammability exposure evaluation time. Originality/value The research results of this paper can provide practical guidance for the current civil airworthiness certification work.

Publisher

Emerald

Subject

Aerospace Engineering

Reference18 articles.

1. Measurement of mass diffusion coefficients of O2 in aviation fuel through digital holographic interferometry;Chinese Journal of Aeronautics,2019

2. Measurement of the diffusion coefficient of water in RP-3 and RP-5 jet fuels using digital holography interferometry;International Journal of Thermophysics,2018

3. Fuel tank flammability reduction means, advisory circular no.25.981-2A;FAA,2008

4. Experimental study of an on-board fuel tank inerting system;IOP Conference Series: Materials Science and Engineering,2017

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Comparative Analysis of Inerting Effects of Open and Closed Vent Systems Fuel Tanks;International Journal of Aeronautical and Space Sciences;2024-07-26

2. Analysis of influencing factors of aircraft fuel tank flammability;Aircraft Engineering and Aerospace Technology;2023-12-18

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