Optimization of Aircraft Fuel Dump Rate towards the Mitigation of Post-Impact Fire

Q4 Physics and Astronomy

Defect and Diffusion Forum Pub Date : 2023-06-06 DOI:10.4028/p-gz5an7

Abdulbaqi Jinadu, O. Olayemi, J. Daniel, Oluwatomiwa John Odenibi, V. Koloskov, D. Tiniakov

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引用次数: 0

Abstract

This study seeks to improve the utilization of compressed air towards a faster fuel jettisoning, to increase the survival rate of passengers in the event of an accident or aborted takeoffs by augmenting the already existing means of dumping fuel with no considerable increase in overall weight. The aircraft fuel dump sub-system was isolated, this process was achieved with the aid of the venturi effect. The engine compressor marks the start of the aircraft fuel dump sub-system while an exterior nozzle for displacing the fuel marks its end. This system achieved jettisoning through bled-off air from the compressor, passing through a converging-diverging nozzle (primary supersonic nozzle), thereby creating a vacuum in the mixing chamber. A jet which provides a direct connection between the fuel tank and the mixing chamber sucks fuel from the tank, where bypassed air from the compressor expels the sucked air in fine particles. After running the simulation, the mass flow rate was computed. The compressed air inlet has a mass flow rate of 58.5193(Kg/S), the kerosene inlet 1.2385(Kg/S) while the outlet has a relative value of-59.6541(Kg/S).This study seeks to improve the utilization of compressed air towards a faster fuel jettisoning, to increase the survival rate of passengers in the event of an accident or aborted takeoffs by augmenting the already existing means of dumping fuel with no considerable increase in overall weight. The aircraft fuel dump sub-system was isolated, this process was achieved with the aid of the venturi effect. The engine compressor marks the start of the aircraft fuel dump sub-system while an exterior nozzle for displacing the fuel marks its end. This system achieved jettisoning through bled-off air from the compressor, passing through a converging-diverging nozzle (primary supersonic nozzle), thereby creating a vacuum in the mixing chamber. A jet that provides a direct connection between the fuel tank and the mixing chamber sucks fuel from the tank, where bypassed air from the compressor expels the sucked air in fine particles. After running the simulation, the mass flow rate was computed. The compressed air inlet has a mass flow rate of 58.5193(Kg/s), and the kerosene inlet 1.2385(kg/s) while the outlet has a relative value of -59.6541(kg/s).

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针对撞击后火灾的飞机燃油倾卸率优化

本研究旨在提高压缩空气的利用率，以更快地抛掷燃料，通过增加现有的抛掷燃料的方法，在不增加总重量的情况下，提高乘客在发生事故或起飞失败时的存活率。对飞机燃料箱分系统进行了隔离，这一过程借助于文丘里效应实现。发动机压气机标志着飞机燃油倾倒子系统的开始，而用于置换燃油的外部喷嘴标志着其结束。该系统通过压缩机排出的空气通过一个会聚-发散喷嘴(主超音速喷嘴)来实现抛射，从而在混合室中形成真空。在油箱和混合室之间提供直接连接的喷气机从油箱中吸入燃料，压缩机旁路的空气将吸入的空气以细颗粒的形式排出。运行仿真后，计算了质量流量。压缩空气进口的质量流量为58.5193(Kg/S)，煤油进口的质量流量为1.2385(Kg/S)，出口的相对流量为59.6541(Kg/S)。本研究旨在提高压缩空气的利用率，以更快地抛掷燃料，通过增加现有的抛掷燃料的方法，在不增加总重量的情况下，提高乘客在发生事故或起飞失败时的存活率。对飞机燃料箱分系统进行了隔离，这一过程借助于文丘里效应实现。发动机压气机标志着飞机燃油倾倒子系统的开始，而用于置换燃油的外部喷嘴标志着其结束。该系统通过压缩机排出的空气通过一个会聚-发散喷嘴(主超音速喷嘴)来实现抛射，从而在混合室中形成真空。在燃料箱和混合室之间提供直接连接的喷嘴从燃料箱中吸入燃料，压缩机旁路的空气将吸入的空气以细颗粒的形式排出。运行仿真后，计算了质量流量。压缩空气进口的质量流量为58.5193(Kg/s)，煤油进口的质量流量为1.2385(Kg/s)，出口的相对流量为-59.6541(Kg/s)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defect and Diffusion Forum Physics and Astronomy-Radiation

CiteScore

1.20

自引率

0.00%

发文量

127

期刊介绍： Defect and Diffusion Forum (formerly Part A of ''''Diffusion and Defect Data'''') is designed for publication of up-to-date scientific research and applied aspects in the area of formation and dissemination of defects in solid materials, including the phenomena of diffusion. In addition to the traditional topic of mass diffusion, the journal is open to papers from the area of heat transfer in solids, liquids and gases, materials and substances. All papers are peer-reviewed and edited. Members of Editorial Boards and Associate Editors are invited to submit papers for publication in “Defect and Diffusion Forum” . Authors retain the right to publish an extended and significantly updated version in another periodical.