Farfield Noise Prediction Using Large-Scale Lattice-Boltzmann Simulations

摘要

In order to predict farfield noise created by the flow over complex geometries, high-fidelity flow simulations based on the Lattice-Boltzmann solver PowerFLOW are used in conjunction with the acoustic analogy solver PowerACOUSTICS. Since the flow needs to be spatially and temporally well resolved, the simulations are usually carried on a large number of computational cores for adequate turnaround times. This paper provides the background on the two-step methodology and gives an overview on aero-acoustics computations in aerospace, ranging from an isolated airframe component to the entire aircraft system.