Attenuation of Cross-Flow Fan Noise Using Porous Stabilizers

Figure 12

Instantaneous stagnant pressure for Case C. (a) at 𝑡=𝑡₀+1/6𝑇, (b) at 𝑡=𝑡₀+1/2𝑇, and (c) at 𝑡=𝑡₀+5/6𝑇. 𝑇 is the blade passing-by period, and 𝑡₀ is the start time of a flow cycle. The unit is Pa.

(a)

(b)

(c)