An Experimental Study On Shock Induced Combustion Of Isolated Regions Of Hydrogen Oxygen Mixtures

Author : Reed W. Forehand
Publisher :
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (128 download)

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Download or read book Numerical Modeling of Shockwave Initiated Combustion of a Hydrogen-oxygen Mixture Within a Shock Tube written by Reed W. Forehand and published by . This book was released on 2021 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock tubes are as close to an ideal reactor as most modern experiments can attain to examine chemical kinetics. As reaction temperatures drop, homogeneous combustion within a shock tube begins to exhibit inhomogeneous modes, which in a typical Hydrogen-Oxygen system are expressed as deflagration to detonation transition. Experimental results of such a system in the University of Central Florida’s low-pressure shock tube have been collected through end and side-wall imaging to analyze flame structure and chemical kinetics. The purpose of this work is to conduct a baselining of these results using both chemical and computational fluid dynamics modeling. The model will use the Siemens STAR-CCM+ computational fluid dynamics software in order to accurately simulate the system. A seven-step reaction mechanism will be used to accurately capture initialization, propagation, and termination of the combustion within an implicit unsteady, three-dimensional, direct eddy simulation solution on a well-conditioned mesh. The end goal of this study is to create a lightweight model of hydrogen-oxygen combustion with a shock tube for baselining purposes. Both a two- and three- dimensional model were applied in this effort. The simulation results indicate good conditioning and agreement with the experimental results, although some combustion phenomena are not captured as well as a higher fidelity, significantly more computationally expensive model would.