Open Access
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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