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The Response of Cryogenic H2/O2 Coaxial Jet Flames to Acoustic Disturbances (POST PRINT)

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Sierra Lobo Inc. Edwards AFB United States

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An experimental study has been conducted to explore the coupling between a coaxial gaseous hydrogen liquid oxygen jet flame and transverse acoustic perturbations. A variety of chamber conditions including acoustic frequency, amplitude, and the location of the pressure node antinode with respect to the flame were examined. The flame response was documented using high-speed imaging including backlit visualization and unfiltered chemiluminescence. Dynamic mode decomposition was used to isolate the spatial structure of the flame response at the forcing frequency. The results indicate that the flame response to forcing is qualitatively similar to previous results of nonreacting coaxial jet flows the pressure node forcing appears to generate in-plane flapping of the flame while pressure antinode forcing induces a helical structure in the flame.

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Conference Paper

Supplementary Note:

AIAA SciTech Forum , 05 Jan 2015, 09 Jan 2015, AIAA SciTech Forum; 5-9 January 2015; Kissimmee, FL; 53rd AIAA Aerospace Meeting.PA Case Number: 14595; Clearance Date: Dec 12, 2014. AIAA 2015-1607; DOI: 10.2514/6.2015-1607 The U.S. Government is joint author of the work and has the right to use, modify, reproduce, release, perform, display, or disclose the work.




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