Unsteady State Diffusion of Pollutants During Cargo Compartment Fire

Authors

Yang Dong, 1.State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China; ;
Liu Zhen, 1.State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, China; ;
Shibin Yang, 2.Civil Aviation University of China, Tianjin 300300, China;
Xiaozhe Sun, 2.Civil Aviation University of China, Tianjin 300300, China;

Abstract

Abstract: The transport of the pollutant gas and smoke in aircraft cargo compartment is investigated numerically on the occurrence of fire disaster. The analysis model based on the volume fire source is established. The 3D unsteady Navier-Stokes equations and transport equations are solved using finite-volume method. The distribution of the temperature is achieved and the unsteady transport principle of pollutant gases and the smoke is analyzed. Numerical results match well with the experiments results, which verifies the correctness of the numerical method. Results show that the ceiling spray behavior is observed when the thermal air is driven by the buoyancy force once fire rises at the bottom of the cargo. The pollutants quickly gather towards the top of the compartment accompanying with the hot air and diffuse towards the horizontal direction away from the fire source. Pollutants move towards the bottom of the cargo after the concentrations reaches saturation near the top of the compartment, which results in the phenomenon that the concentrations of the pollutants declines with the decrease of the height away from the fire source. The study provides references for the installation of smoke alarms.

Recommended Citation

Dong, Yang; Zhen, Liu; Yang, Shibin; and Sun, Xiaozhe (2019) "Unsteady State Diffusion of Pollutants During Cargo Compartment Fire," Journal of System Simulation: Vol. 30: Iss. 1, Article 36.
DOI: 10.16182/j.issn1004731x.joss.201801036
Available at: https://dc-china-simulation.researchcommons.org/journal/vol30/iss1/36

First Page

278

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201801036

Last Page

284

CLC

TP391.9

Recommended Citation

Yang Dong, Liu Zhen, Yang Shibin, Sun Xiaozhe. Unsteady State Diffusion of Pollutants During Cargo Compartment Fire[J]. Journal of System Simulation, 2018, 30(1): 278-284.

DOI

10.16182/j.issn1004731x.joss.201801036