CAA of an Air-Cooling System for Electronic Devices

Figure 26

Normalized discrete Fourier transform of the aeroacoustic sources computed according to the right-hand side of (4) and sound pressure field computed by the CAA method based on URANS data at 95 Hz (a, b) and 247 Hz (c, d) on a cylindrical plane concentric to the fan axis at a radius of 35 mm (blue: 0; red: 1).

(a) Acoustic sources at 95 Hz

(b) Sound pressure at 95 Hz

(c) Acoustic sources at 247 Hz

(d) Sound pressure at 247 Hz