Simulation of thermal hazards from hydrogen under-expanded jet fire

被引:47
作者
Cirrone, D. M. C. [1 ]
Makarov, D. [1 ]
Molkov, V. [1 ]
机构
[1] Ulster Univ, Hydrogen Safety Engn & Res Ctr HySAFER, Shore Rd, Newtownabbey BT37 0QB, North Ireland
基金
英国工程与自然科学研究理事会; 欧盟地平线“2020”;
关键词
CFD; Jet fire; High pressure; Hydrogen safety; Radiative heat transfer; Under-expanded jet; HIGH-PRESSURE; ENCLOSURE; RELEASE; FLAMES;
D O I
10.1016/j.ijhydene.2018.08.106
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Thermal hazards from an under-expanded (900 bar) hydrogen jet fire have been numerically investigated. The simulation results have been compared with the flame length and radiative heat flux measured for the horizontal jet fire experiment conducted at INERIS. The release blowdown characteristics have been modelled using the volumetric source as an expanded implementation of the notional nozzle concept. The CFD study employs the realizable k-epsilon model for turbulence and the Eddy Dissipation Concept for combustion. Radiation has been taken into account through the Discrete Ordinates (DO) model. The results demonstrated good agreement with the experimental flame length. Performance of the model shall be improved to reproduce the radiative properties dynamics during the first stage of the release (time < 10 s), whereas, during the remaining blowdown time, the simulated radiative heat flux at five sensors followed the trend observed in the experiment. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:8886 / 8892
页数:7
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