Specialists in Linear Flow Analysis
Category 4 Benchmark Problem
This test case was defined at the
"Third Computational Aeroacoustics (CAA) Workshop on Benchmark Problems".
The aim is to determine the amplitudes of the reflected and transmitted
acoustic modes due to an incoming vorticity wave impinging on 24 flat plates
in an annulus.
The basic geometry is shown in the table below.
The amplitude of the incoming vorticity wave is set to 10 percent of
the steady axial flow velocity and the amplitude is assumed to be constant in the
The full description of the test case can be found in the
| Geometry || 3D Annulus
| Number of Blades || 24
| Incoming Circumferential Wave Number || 16
| Hub to Tip Ratio || 0.5
| Gap to Chord Ratio at Tip || 1.0
| Steady Axial Mach number || 0.5