The increasing interest in thermoacoustic phenomena in turbomachinery components prompted a detailed analysis of acoustic field propagation in ducts. The numerical codes for the prediction of the acoustic behavior of complex system are still in a developing phase and an experimental validation is still necessary. The wall acoustic pressure could be easily measured whereas very few examples of radial measurement, necessary for a 3D analysis, are present in the literature. In this paper, several simple remote probes mounting a ¼" pressure microphone were characterized. The one that performed best, was used to map the acoustic pressure field of a wave propagating in a circular duct with different modes. The experimental set up and the calculation methodology are shown in detail in the paper.
Experimental characterization of acoustic pressure waves propagating in circular ducts
Ferrari Lorenzo;
2012
Abstract
The increasing interest in thermoacoustic phenomena in turbomachinery components prompted a detailed analysis of acoustic field propagation in ducts. The numerical codes for the prediction of the acoustic behavior of complex system are still in a developing phase and an experimental validation is still necessary. The wall acoustic pressure could be easily measured whereas very few examples of radial measurement, necessary for a 3D analysis, are present in the literature. In this paper, several simple remote probes mounting a ¼" pressure microphone were characterized. The one that performed best, was used to map the acoustic pressure field of a wave propagating in a circular duct with different modes. The experimental set up and the calculation methodology are shown in detail in the paper.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
