High-Speed Imaging Of The Dynamics Of H2/O2 Ignition At Low To Moderate Temperatures In A Shock Tube

Abstract

In this study, ignition delay times and high-speed images were taken behind reflected shockwaves during hydrogen oxygen ignition. Experimental conditions were temperatures between 858-1082K and pressures between 2.74-3.91atm for a 15%H2/18%O2/Ar mixture. Experiments were conducted in both a clean and dirty shock tube. Ignition delay times showed no significant deviations between these two types of tests, but endwall image sequences conducted in a dirty facility showed a large amount of dirt and soot particulates, clouding the images during preignition. The high concentration mixture exhibited strong pre-ignition ramp behavior at temperatures <1000K over the temperature and pressure ranges studied. Several of the runs conducted with the high concentration mixture exhibited a deflagration to detonation transition. Current high-speed results for ignition delay times confirm previous literature studies conducted using without imaging and chemical kinetic modeling.

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/10.2514/6.2017-1796

Socpus ID

85017275571 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85017275571

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