CFD evaluation against a large scale unconfined hydrogen deflagration |
| |
Authors: | I.C. Tolias A.G. Venetsanos N. Markatos C.T. Kiranoudis |
| |
Affiliation: | 1. National Center for Scientific Research Demokritos, Environmental Research Laboratory, Agia Paraskevi 15310, Greece;2. National Technical University of Athens, School of Chemical Engineering, Heroon Polytechniou 9, Zografou 15780, Greece;3. Texas A&M University at Qatar, Department of Chemical Engineering, Doha, Qatar |
| |
Abstract: | In the present work, CFD simulations of a large scale open deflagration experiment are performed. Stoichiometric hydrogen–air mixture occupies a 20 m hemisphere. Two combustion models are compared and evaluated against the experiment: the Eddy Dissipation Concept model and a multi-physics combustion model which calculates turbulent burning velocity based on Yakhot's equation. Sensitivity analysis on the value of fractal dimension of the latter model is performed. A semi-empirical relation which estimates the fractal dimension is also tested. The effect of the turbulence model on the results is examined. LES approach and k-ε models are used. The multi-physics combustion model with constant fractal dimension value equal to 2.3, using the RNG LES turbulence model achieves the best agreement with the experiment. |
| |
Keywords: | Open deflagration Explosion CFD modeling Fractal dimension Model comparison ADREA-HF |
本文献已被 ScienceDirect 等数据库收录! |
|