This paper presents a linear method to postprocess unsteady computations as tied to a fluctuating energy balance. In the field of solid rocket propulsion, this method can be useful to analyze unstable motors with periodic pressure fluctuations within the two-phase flow. It allows one to determine the main fluctuating energy sources in the motor. Derivation of the method is presented in this paper. Moreover, using a simple test case, a fluctuating energy balance approach is compared with a classical linear acoustic balance approach. Both methods produce satisfactory results, but the fluctuating energy balance approach captures more of the physics. Cases, respectively, exhibiting thermoacoustic interaction and parietal vortex shedding are also addressed to show the assets of the fluctuating energy balance approach in comparison with the acoustic balance method.
Fluctuating Energy Balance Method for Postprocessing Multiphase Flow Computations
Journal of Propulsion and Power ; 29 , 3 ; 699-708
2013-03-01
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Fluctuating Energy Balance Method for Postprocessing Multiphase Flow Computations
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