CFD Modeling of Hydrogen Releases and Dispersion in the Exhaust Pipe of Rocket Tank

Abstract:

The dispersion process of hydrogen leaking from the exhaust pipe of rocket tank is analyzed with numerical simulations in order to assess hazards and associated risks of a leakage accident in the present study. The temporal and spatial evolution of the hydrogen concentration at the different tank pressures is predicted numerically. The results show that when the tank pressure is 0.35MPa, the farthest dispersion distance of flammable region in the horizontal direction is 156m within 15s of leakage, simultaneously, the vertical distance upward is 80m and the vertical distance downward is 51m. Additionally, due to the assumption that the tank pressure is constant, the leakage rate is constant and extremely high, buoyancy can’t impel completely hydrogen clouds to diffusion upward. The present numerical results can be useful to analyze safety issues in the aerospace field.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 1764-1768
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.1764
• Online since: September 2014
• Authors: Jing Peng Chen*, Yuan Li, Cun Yan Cui, Yun Chun Jiang, Xing Li, Xiao Yong Li
• Keywords: CFD Modeling, Dispersion, Hydrogen, Rocket Tank

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