Simulation of noise generation due to blade row interaction in a high speed compressor

Numerical simulation of multistage turbine sound generation and propagation

“…While another tested method of sound propagation [33,34], the four pole theory [13,14], is exact under certain circumstances (e.g. no mode conversion), the beetle method leads to better results when any reflection of waves can be neglected.…”

“…Furthermore, it is intended in the future to perform parametric investigations in order to study the effect of lean, sweep or bow on sound generation and sound propagation. The method of Uslu et al [33,34] did not fulfil these challenging requirements any more.…”

“…This method should preferably be used for compressors where the 3D geometry of blades and vanes is very close to 2D flat plates. Uslu et al [33,34] successfully studied the effect of blade or vane number variations on sound generation and sound propagation. This method is not suitable to study the effect of blade/vane geometry variations (e.g.…”

“…Uslu et al [33,34] performed a study on sound propagation in a 3-stage high speed low pressure compressor. Here, Lin3D was used for noise generation computations and TR-LOSS for the sound propagation, based on the four pole theory coupling 2D flat plate calculations [13,14].…”