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Reduce the pressure, go for particle velocity

Scientific Paper | Turbo-compressor and piping noise assessment using a particle velocity based sound emission method

ABSTRACT

Currently, there are very few in-situ measurement procedures available to evaluate the noise emissions of large machinery. Pressure based techniques often encounter difficulties adapting to industrial scenarios from controlled laboratory experiments. The presence of high background noise levels generated by surrounding equipment, along with the reverberant characteristics of most industrial sites, prevents the application of standard sound characterization techniques. In contrast, particle velocity measurements performed near a rigid radiating surface are less affected by background noise and can potentially be used to address noise problems even in such conditions. The vector nature of particle velocity, an intrinsic dependency upon surface displacement and sensor directivity are the main advantages over sound pressure based solutions. In this paper, the foundations of the proposed method are presented along with the experimental evaluation of the flow-induced noise of a large turbo-compressor and piping system. The results show the capabilities of this method for identifying and quantifying noise emissions of problematic elements, despite high levels of background noise.

Guiot, M., Fernandez Comesana, D., Korbasiewicz, M. and Carrillo Pousa, G., 2015. Turbo-compressor and piping noise assessment using particle velocity based sound emission methods. In INTER-NOISE and NOISE-CON Congress and Conference Proceedings (Vol. 250, No. 4, pp. 2944-2952). Institute of Noise Control Engineering.

Reduce the pressure, go for particle velocity

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