Methodology for inerting system analysis in the long-range aircraft preliminary design phase

Filho, Valdi Freire da Fonseca; Lacava, Pedro Teixeira

doi:10.1007/s40430-023-04014-2

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…, 2023; Díaz Palencia, 2023) developed formulations for a nonlinear diffusion model with forced convection in the form of a reaction-absorption system and applied them to an Airbus A320 aircraft to calculate the time required for an explosion to occur due to the presence of oxygen in the fuel tank. da Fonseca Filho (da Fonseca Filho and Lacava, 2023) specified a methodology for an optimized inerting system conceptual design based on fuel tank flammability analysis defined by rules for commercial aircraft certification proposal to evaluate the impact on engine bleed consumption in a modernized commercial long-range aircraft model. Feng Chenxi et al.…”

Section: Introductionmentioning

confidence: 99%

Improvement of inert-gas distribution for fuel tanks with the objective of minimum bleed flowrate

Lin,

Liu

2024

AEAT

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Purpose To ensure the safety of aircraft fuel tanks, the FAA issued an airworthiness clause (25.981(b)) suggesting that the risk of combustion and explosion be reduced by installing a Flammability Reduction Means or an Ignition Mitigation Means. The airflow distribution method has a significant effect on the inerting performance. Therefore, this study aims to determine an optimum airflow distribution method of the inerting system. Design/methodology/approach This paper establishes the calculation model of the oxygen concentration in the ullage of a multi-bay fuel tank, calculates the oxygen concentration in the ullage of an aircraft tank in single-flow and dual-flow modes under series and parallel ventilation methods and analyses the inerting performance of the tank under different airflow distribution methods. Findings The results show that: (1) the bleed flow rate required to achieve whole process inerting of multi-bay fuel tank in dual-flow mode is lower than that in single-flow mode; (2) under the parallel ventilation method, the decrease of oxygen concentration and the uniformity of each bay are better than that in the series ventilation method; (3) dual-flow mode staged ventilation method can be used to achieve the whole process inerting of the tanks under the minimum engine bleed consumption. Originality/value The novelty of this paper is to analyze and optimize the airflow distribution method of the inerting system under the whole flight envelope to minimize the engine bleed consumption.

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Section: Introductionmentioning

confidence: 99%

Improvement of inert-gas distribution for fuel tanks with the objective of minimum bleed flowrate

Lin,

Liu

2024

AEAT

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Analysis on Fuel Spillage from Surge Tank and Optimization of Vent System for Civil Aircraft

Zhao

2024

J. Phys.: Conf. Ser.

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This paper introduces the composition and function of civil aircraft fuel tank ventilation and inerting systems. The ventilation and inerting systems are closely related to the fuel tank, so there is a cross-link between the two. Given the fuel spillage phenomenon of the surge tank, which occurs during the climb of the aircraft due to the imperfect design of the fuel tank vent system, the mechanism of the fuel spillage and the role of the inerting system in the fuel spillage process are analyzed. Meanwhile, the optimization measures of the fuel tank vent system are introduced, which can provide experience reference for the cross-linking design of the fuel tank system and inerting system of other aircraft.

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Methodology for inerting system analysis in the long-range aircraft preliminary design phase

Cited by 2 publications

References 10 publications

Improvement of inert-gas distribution for fuel tanks with the objective of minimum bleed flowrate

Improvement of inert-gas distribution for fuel tanks with the objective of minimum bleed flowrate

Analysis on Fuel Spillage from Surge Tank and Optimization of Vent System for Civil Aircraft

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