Computational Modeling Approaches for Studying Transverse Combustion Instability in a Multi-element Injector

The current study describes two modeling approaches to model an unstable seven element linear array of shear coaxial injectors. The first approach is a reduced model where the driving injectors are replaced with an artificial forcing term. The forcing amplitude can be adjusted so that the effect of...

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Bibliographic Details
Main Authors: Harvazinski, M E, Shipley, K J, Talley, D G, Sankaran, V, Anderson, W E
Format: Report
Language:English
Subjects:
AMPLITUDE
COAXIAL CONFIGURATIONS
Combustion and Ignition
COMBUSTION STABILITY
COMPUTATIONS
EXCITATION
EXPERIMENTAL DATA
INJECTORS
INSTABILITY
LINEAR ARRAYS
MATHEMATICAL MODELS
MEASUREMENT
PHYSICAL PROPERTIES
Q0A1
REDUCTION
SELF OPERATION
TRANSVERSE
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Summary:The current study describes two modeling approaches to model an unstable seven element linear array of shear coaxial injectors. The first approach is a reduced model where the driving injectors are replaced with an artificial forcing term. The forcing amplitude can be adjusted so that the effect of the transverse instability on the center study element can be examined parametrically. The second approach models the entire domain, and can capture additional details such as the inter-element interactions and the self-excited nature of the instability. Both sets of results are compared with experimental measurements and used to provide physical insights into the underlying instability mechanisms. The original document contains color images.