Whistling of short corrugated pipes: experimental investigation of the source locations

The goal of this study is to investigate the issue of the aeroacoustic source location within corrugated pipes. For this purpose, a configuration with a short pipe and well defined boundary conditions is chosen. These investigations have been carried out focusing on the first two whistling modes. This allows for a precise knowledge of the distribution of the acoustic velocity and pressure within the pipe. The methodological investigation of the source locations has been carried out by using straight pipe segments to replace the corrugated section near the acoustic velocity nodes and near the acoustic velocity antinodes. The sections of the corrugated pipe near the acoustic velocity antinodes has been identified as the main location of the sound sources. © 2010 by J. Golliard.