Measurements of the impedance matrix of a thermoacoustic core: Applications to the design of thermoacoustic engines - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of the Acoustical Society of America Année : 2013

Measurements of the impedance matrix of a thermoacoustic core: Applications to the design of thermoacoustic engines

(1) , (1) , (1) , (1)
1

Résumé

The successful design of a thermoacoustic engine depends on the appropriate description of the processes involved inside the thermoacoustic core (TAC). This is a difficult task when considering the complexity of both the heat transfer phenomena and the geometry of the porous material wherein the thermoacoustic amplification process occurs. An attempt to getting round this difficulty consists in measuring the TAC transfer matrix under various heating conditions, the measured transfer matrices being exploited afterward into analytical models describing the complete apparatus. In this paper , a method based on impedance measurements is put forward, which allows the accurate measurement of the TAC transfer matrix, contrarily to the classical two-load method. Four different materials are tested, each one playing as the porous element allotted inside the TAC, which is submitted to different temperature gradients to promote thermoacoustic amplification. The experimental results are applied to the modeling of basic standing-wave and traveling-wave engines, allowing the prediction of the engine operating frequency and thermoacoustic amplification gain, as well as the optimum choice of the components surrounding the TAC.
Fichier principal
Vignette du fichier
bannwart_et_al_JASA_13.pdf (1.1 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02057382 , version 1 (05-03-2019)

Identifiants

Citer

Flavio Bannwart, Guillaume Penelet, Pierrick Lotton, Jean-Pierre Dalmont. Measurements of the impedance matrix of a thermoacoustic core: Applications to the design of thermoacoustic engines. Journal of the Acoustical Society of America, 2013, 133 (5), pp.2650-2660. ⟨10.1121/1.4796131⟩. ⟨hal-02057382⟩
27 Consultations
177 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More