| Citation: | WANG Suming, FENG Shiyu, LI Zongqi, et al. Numerical simulation and comparison of oxygen consumption inerting and hollow membrane inerting in fuel tank[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(5): 1032-1038. doi: 10.13700/j.bh.1001-5965.2019.0332(in Chinese)
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To solve the problem of oxygen mole fraction changing with time in the upper space of oil tank of oxygen consuming inerting system. A mathematical model was established for the reaction process of the Green On-Board Inert Gas Generation System (GOBIGGS), and the inerting process of the GOBIGGS and the On-Board Inert Gas Generation System (OBIGGS) was simulated by CFD method. The simulation results were compared with the experimental data, which verifies the accuracy of the simulation results. The research results show that, when the flow rate of the exhaust gas from the fuel tank in the GOBIGGS is identical with that of the Nitrogen Enriched Air (NEA) in the OBIGGS, GOBIGGS not only has shorter inerting time than OBIGGS, but also reduces the oxygen mole fraction of the fuel tank to a lower level. The inerting effect of the GOBIGGS is similar to that of the OBIGGS of NEA0 (100%N2) under the same flow rate. GOBIGGS makes the upper oxygen mole fraction greater than the lower oxygen mole fraction in the gas phase space of the fuel tank, while OBIGGS is the opposite.
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