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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Print: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.910
pages 889-902

FREQUENCY RESPONSE OF A MODEL SUBSCALE ROCKET MOTOR

R. O. Hessler
Somerville, AL, USA and Rensselaer, IN, USA
R. L. Glick
Somerville, AL, USA and Rensselaer, IN, USA
R. Bertele
Laboratorio di Termofisica, Politecnico di Milano, Milan, Italy
D. Cedro
Laboratorio di Termofisica, Politecnico di Milano, Milan, Italy
G. Fiorentino
Laboratorio di Termofisica, Politecnico di Milano, Milan, Italy

ABSTRACT

Burg's Method is applied in a passive linear stability measurement (PLSM) procedure to extract estimates of acoustic mode frequencies, stability parameters α, and mode shapes from multiple measurements of low-level pseudorandom oscillations in a model subscale rocket motor chamber. Radial variations of mode shapes suggest inadequacy of 1D analysis for even relatively small variations of chamber cross-sectional area.


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