Wall Pressure and Blade Surface Pressure in a Side Channel Blower

Figure 19

PSD of wall pressure at a rotational speed of Hz and = 28,000 Pa. Each plot contains the same axial position for different circumferential positions.

(a) Axial position 1 up to 10 kHz

(b) Axial position 1 up to 1 kHz

(c) Axial position 4 up to 10 kHz

(d) Axial position 4 up to 1 kHz

(e) Axial position 6 up to 10 kHz

(f) Axial position 6 up to 1 kHz