Open AccessParameter Identification for a Low-Order Network Model of Combustion Instabilities
Author(s) -
André S.P. Niederberger,
Bruno Schuermans,
Lino Guzzella
Publication year - 2009
Publication title -
international journal of spray and combustion dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 16
eISSN - 1756-8285
pISSN - 1756-8277
DOI - 10.1260/175682709788083380
Subject(s) - transfer function , combustion , loudspeaker , acoustics , mechanics , identification (biology) , physics , function (biology) , computer science , system identification , aerospace engineering , engineering , chemistry , botany , organic chemistry , database , evolutionary biology , electrical engineering , biology , measure (data warehouse)
This paper describes the identification and modeling of a test rig designed to study thermoacoustic instabilities. Various operating conditions with different flame structures are identified. Physics-based models are used in a network model in order to advance the understanding of the phenomena involved. The parameters identified of the flame correlate well with the observed flame shapes. The transfer function from a loudspeaker input to a pressure reading is assembled and compared to measurements. Reflection coefficients are introduced to study the amplifying frequency ranges of the flame, which correspond to the highest peaks in the pressure spectrum