Experimental Study Of Initially Turbulent Premixed Flames Interacting With Transverse Slot Jet

Abstract

An experimental investigation of hydrogen-air flames is conducted using an optically accessible semi-confined channel. Initially turbulent flames propagate from the closed end towards a transverse slot jet. The focus of the present work is to observe the early stages of the Deflagration-to-Detonation Transition in a highly turbulent environment with the aim of classifying the conditions of turbulence driven DDT. Conventional obstacles and confinement effects generate shock reflections that produce the spontaneous detonation near the walls. The current facility allows for thorough investigation of the early conditions that eventually initiate a detonation not reliant on boundary layer effects, transverse acoustic perturbations or reflected shocks off in-flow obstacles. Schlieren imaging enables the analysis of flame propagation rates and the observation of the early stages of the DDT phenomenon. Experimental data capturing the dynamics of turbulence driven DDT will help validate existing numerical simulations of fast deflagrated flames exposed to high levels of turbulence.

Publication Date

1-1-2018

Publication Title

2018 Joint Propulsion Conference

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2018-4780

Socpus ID

85066493705 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85066493705

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