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Table 2

Measured () and simulated () overall sound pressure level at different operating points of the fan in MFS and MFL setup; MFS (MPP,…) and MFL (MPP,…) setup simulation with MPP and -difference Δ(R.. − M..) between reference and MPA setup.

in m3s−1 Setup in dB in dB Δ(RFS − MFS)
0.8 F, MFS 76.8 12.0
B, MFS 74.9 10.9
1.0 F, MFS 75.4 3.8
B, MFS 76.0 11.7
1.2 F, MFS 72.1 1.9
B, MFS 76.1 16.3
1.4 F, MFS 69.2 2.3
B, MFS 73.0 6.3
1.9 F, MFS 67.1 3.0
B, MFS 67.1 2.0
MFS, MPP, Lc,140 60.4 5.3
MFS, MPP, Lc,200 60.1 5.6
Δ(RFL − MFL)
0.8 F, MFL 77.3 11.8
B, MFL 71.9 13.4
1.0 F, MFL 73.1 5.6
B, MFL 75.6 11.7
1.2 F, MFL 68.2 4.4
B, MFL 78.0 14.7
1.4 F, MFL 66.8 4.7
B, MFL 73.7 6.1
1.9 F, MFL 65.9 4.5
B, MFL 64.2 4.9
MFL, MPP, Lc,140 61.2 3.9
MFL, MPP, Lc,200 60.8 4.3

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