This study investigates the temperature effect on the impedance of conventional single-degree-of-freedom liners, both without and with grazing flow. Experiments are performed in a controlled environment, with a detailed monitoring of the temperature all along the liner sample. The liner impedance is either derived from the reflection coefficient measured in a normal impedance tube or is educed with an inverse method from acoustic velocity or wall pressure fields measured in the ONERA grazing flow duct. The influence of the acoustic source level on the temperature of the sample is also addressed, which enlightens a strong multiphysics coupling between acoustics, flow, and thermal phenomena.
Experimental Assessment of the Effect of Temperature Gradient Across an Aeroacoustic Liner
Journal of Aircraft ; 56 , 5 ; 1809-1821
2019-05-22
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
KSC VAB Aeroacoustic Hazard Assessment
NTIS | 2010
|KSC VAB Aeroacoustic Hazard Assessment
NTRS | 2010
|