Spatial coherence of pipe vibrations induced by an internal turbulent flow

Whereas the spatial coherence of wall pressure and vibratory fields induced by turbulent boundary layers (TBLs) on flat plates have been studied at extent, their equivalents for cylindrical structures still need further investigation. To that end, this work develops a semi-analytical model which is valid infinite shells filled with heavy fluid excited an internal TBL. The shell can be also coupled to two ring stiffeners account flanges generally used connect pipe other portions circuit. cross-spectrum density (CSD) function radial accelerations estimated from system circumferential sensitivity functions CSD field vibration therefore analysed without flanges. This critical importance applications such as non-intrusive techniques detecting acoustic sources inside pipes, like beamforming using arrays accelerometers. If conveys flow, efficiency strongly deteriorate because background noise TBL, pollutes signal between sensors. effects could results line point sensors (accelerometers) wire (piezoelectric coiled wires) are investigated in paper.