Experimental Studies of Turbulent Premixed Flames in Compressible Flows
Technical Report,30 Sep 2015,31 Aug 2019
Georgia Tech Research Corporation Atlanta United States
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An experimental study of flame kernel ignition and propagation in compressible flow is undertaken to understand whether classical low-speed flame speed models are valid in supersonic flows. Flame kernel are laser ignited and tracked in anisotropic premixed turbulence in a channel for Mach numbers from 1.5-2.0. OH-LIF and PIV is used to investigate flame propagation characteristics. Filtered Rayleigh Scattering technique is also developed and issues for its use in supersonic flow are identified. It is shown that the flame kernal grows and propagates in supersonic flow. A refinement to the flame speed scaling is suggested using a combination of experimental results and supporting numerical simulations.
- Combustion and Ignition
- Fluid Mechanics