Application of a Beamforming Technique to the Measurement of Airfoil Leading Edge Noise

Table 1

Turbulence grids used in the experiments, grid parameters according to Figure 3 for perforated plates with square holes (PPS).

Abbr.	Mesh width	Bar width	Thickness	Porosity
	𝑀 [mm]	𝑎 [mm]	𝑡 [mm]	𝛽
PPS 12/2	12	2	1	0.69
PPS 14/4	14	4	1	0.51