Abstract
AbstractThis paper is aimed at studying the down-reaching flame behaviors of tank fires with large ullage heights. Experiments were first conducted using a gas burner in a transparent quartz glass cylinder to simulate the large ullage and the experimental data was used to validate the computational fluid dynamics (CFD) model. Subsequently the effects of ullage height, fuel velocity and burner diameter on the flame behaviors were examined systematically. Both experimental and numerical results showed that, for lower fuel velocities, the down-reaching flame height (hdown) is restricted by the ullage height. As the fuel velocity continues to increase exceeding a critical value, independent of the ullage height, hdown starts to decrease. For a given fuel velocity, hdown increases with an increase of the burner diameter owing to enhanced air entrainment. A detailed analysis of the flow field and oxygen concentration inside the tank at the steady burning stage was also carried out. Based on the numerical results and dimensionless analysis, a piecewise function was proposed to predict the down-reaching flame height and validated against the experimental data.
Funder
Opening Funds of Sichuan Provincial Key Laboratory of Civil Aircraft Fire Science and Safety Engineering
National Key R&D Program of China
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Publisher
Springer Science and Business Media LLC
Reference42 articles.
1. Zinke R, Köhler F, Klippel A, Krause U, Leitl B (2020) Emissions of volatile hydrocarbons from floating roof tanks and their local dispersion: considerations for normal operation and in case of damage. J Loss Prevent Proc 66:104179. https://doi.org/10.1016/j.jlp.2020.104179
2. Tauseef SM, Abbasi T, Pompapathi V, Abbasi SA (2018) Case studies of 28 major accidents of fires/explosions in storage tank farms in the backdrop of available codes/standards/models for safely configuring such tank farms. Process Saf Environ 120:331–338. https://doi.org/10.1016/j.psep.2018.09.017
3. He BJ (2021) Cangzhou Dingrei Petrochemical 5.31 fire accident investigation report was officially released, and some people were handed over to judicial processing. https://baijiahao.baidu.com/s?id=1710520734219168433&wfr=spider&for=pc. Accessed 10 Sept 2021
4. Orloff L, De Ris J (1982) Froude modeling of pool fires. Symp Int Combust 19(1):885–895. https://doi.org/10.1016/S0082-0784(82)80264-6
5. Artemenko ES, Blinov VI (1968) Burning of liquids in vessels with change of level. Comb Explo Shock+ 4(1):39–42. https://doi.org/10.1007/BF00843071