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- W2351009908 abstract "This paper wants to present a numerical simulation model we have developed to simulate the nitrogen-enriched air(NEA) flow in the whole flying process of a commercial transport aircraft center wing tank(CWT).The simulation results not only prove the validity of the variation ratio curve of the average oxygen concentration of each bay vs time,but also the truthfulness of the space distribution of oxygen concentration within the CWT by contours.A comparative analysis of the numerical results shows that the mass flowing rate of the nitrogen-abound air determines the inert ratio of each bay,and the entire descending stage of the flight tends to envelop the highest average oxygen concentration of the fuel tank decrease with the increase of mass flux rate.This conclusion of ours is consistent with the actual flight reality.And,therefore,it can be said that for all the different distribution methods of the NEA, the space distribution of oxygen concentration in the fuel tank ought to have a significant difference.And,the results of our simulation also show that the distribution methods of the NEA have a great effect on the average oxygen concentration during the descending stage.And better distribution methods would make the space distribution of oxygen concentration more uniform and balanced within the CWT though they may reduce the inerting ratio of each bay.The reason is that some NEA may not have mixed enough with the vapors of the CWT.However,under the same mass flux rate,the more uniform the space distribution of oxygen concentration is within the CWT,the greater safety the aircraft fuel tank would bring about during the descending stage.Thus,it can be said that our simulated research results can provide a theoretical basis for the study of how the design of transportation airplanes may affect the inerting system of the machine." @default.
- W2351009908 created "2016-06-24" @default.
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- W2351009908 date "2013-01-01" @default.
- W2351009908 modified "2023-09-28" @default.
- W2351009908 title "Numerical simulation of inert gas distribution in the whole flying process in the central wing tank" @default.
- W2351009908 hasPublicationYear "2013" @default.
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