TY - JOUR T1 - Flow-Induced Acoustics in Corrugated Pipes JO - Communications in Computational Physics VL - 1 SP - 120 EP - 139 PY - 2011 DA - 2011/10 SN - 10 DO - http://doi.org/10.4208/cicp.301209.230710a UR - https://global-sci.org/intro/article_detail/cicp/7437.html KW - AB -

When gas flows through corrugated pipes, pressure waves interacting with vortex shedding can produce distinct tonal noise and structural vibration. Based on established observations, a model is proposed which couples an acoustic pipe and self-excited oscillations with vortex shedding over the corrugation cavities. In the model, the acoustic response of the corrugated pipe is simulated by connecting the lossless medium moving with a constant velocity with a source based on a discrete distribution of van der Pol oscillators arranged along the pipe. Our time accurate solutions exhibit dynamic behavior consistent with that experimentally observed, including the lock-in frequency of vortex shedding, standing waves and the onset fluid velocity capable of generating the lock-in.