An Experimental Investigation Of Fast Hydrogen-Air Flames And Detonations Using A Turbulence Generating Facility

Abstract

Propagating premixed hydrogen-air flames are experimentally studied using a semi-confined square channel with turbulence inducing obstacles. The focus of the study is to achieve reliable and repeatable control of propagating flame behavior by examining several experimental configurations. By varying the configuration of solid obstacles and fuel concentration of the reactant mixture, the resulting flow field turbulence, shock strength and flame propagation velocity is controlled. High-speed Schlieren is used to capture the various modes of shock and flame structures. This enables focused observations of the different combustion modes including fast deflagration, quasi-detonation and detonation. The present work expands our understanding of the transient flame evolution and illuminates the development of several flame regimes before the onset of detonation. This experimentation also lays the groundwork for further focused exploration of the critical conditions that guarantee a DDT occurrence.

Publication Date

1-1-2017

Publication Title

AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2017-0599

Socpus ID

85017217717 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85017217717

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