Numerical Simulation of Aerodynamic Noise with DLR's aeroacoustic code PIANO

Abstract

The code PIANO, developed at the Institute of Aerodynamics and Flow Technology (Dept.
\nTechnical Acoustics), is designed to simulate aeroacoustic noise generation and acoustic wave
\npropagation in non-uniform flows. It is based on the equations governing the inviscid dynamics
\nof perturbations to a given time-averaged mean flow field. PIANO simulates the noise generation
\nprocess, when vorticity interacts with solid structures or gradients in the flow field. PIANO is
\nnot designed to calculate wave propagation over very large distances in uniform flows, like from
\naircraft to ground. In that case methods based on wave equations are more appropriate.
\nCurrently, PIANO is based on structured, curvilinear multi-block grids. The coding structure is
\ndesigned for high performance on workstations, vector machines, PCs or PC clusters as well.
\nPIANO is a research code.