Laminar Deflagrated Flame Interaction With A Fluidic Jet Flow For Deflagration-To-Detonation Flame Acceleration

Abstract

Recently researchers have begun to understand the full potential of Pulse Detonation Engines (PDEs) to efficiently produce an immense amount of thrust due to the generated detonation wave. Numerous experimental PDE facilities have been engineered which successfully achieve detonation through the use of solid obstructions to induce turbulent combustion. These obstacles create recirculation regions within the propagating flame and reflect acoustic waves, both of which contribute to turbulence production within the flame. Despite success, the use of a solid object has numerous drawbacks including pressure losses and heat soaking. An alternate solution to induce turbulence is through the use of a fluidic-based jet. The goal of the current research is to investigate the fundamental physics governing the interaction of a laminar deflagrated flame with a fluidic jet. The fluidic jet is an efficient mechanism for inducing turbulence and flame acceleration relative to solid obstacles. Control of the jet velocity provides dynamic control of turbulent production mechanisms. Additionally, the jet eliminates pressure losses and heat soak effects induced by obstacles. A PDE experimental setup is utilized for the investigation. The effects of varying equivalence ratios of methane and air for the flame and jet, as well as varying jet momentum ratios, on the interaction are studied. The interaction is explored using non-invasive testing methods including Schlieren imaging and Particle Image Velocimetry (PIV). These techniques provide qualitative and quantitative data pertaining to the interaction, which are used to define the physics of the interaction.

Publication Date

1-1-2015

Publication Title

51st AIAA/SAE/ASEE Joint Propulsion Conference

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2514/6.2015-4096

Socpus ID

85085405547 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85085405547

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