| Titre : | Bifurcations of self-excited ducted laminar premixed flames (2012) |
| Auteurs : | Lipika Kabiraj, Auteur ; R. I. Sujith, Auteur ; Pankaj Wahi, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Transactions of the ASME . Journal of engineering for gas turbines and power (Vol. 134 N° 3, Mars 2012) |
| Article en page(s) : | 07 p. |
| Note générale : | Génie mécanique |
| Langues : | Anglais |
| Index. décimale : | 620.1 (Essais des matériaux. Défauts des matériaux. Protection des matériaux) |
| Tags : | Bifurcation Chemiluminescence Combustion Flames Oscillations Thermoacoustics Time series |
| Résumé : | Bifurcation analysis is performed on experimental data obtained from a simple setup comprising ducted laminar premixed conical flames in order to investigate the features of nonlinear thermoacoustic oscillations. It is observed that as the bifurcation parameter is varied, the system undergoes a series of bifurcations leading to characteristically different nonlinear oscillations. Through the application of nonlinear time series analysis to pressure and flame (CH* chemiluminescence) intensity time traces, these oscillations are characterized as periodic, aperiodic, or chaotic oscillations, and subsequently the nature of the obtained bifurcations is explained based on dynamical systems theory. Nonlinear interaction between the flames and the acoustic modes of the duct is clearly reflected in the high speed flame images acquired simultaneously with pressure time series. |
| DEWEY : | 620.1 |
| ISSN : | 0742-4795 |
| En ligne : | http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ000134000003031502000001&idtype=cvips&gifs=Yes&ref=no |
