Open Access
Table 2
The experimental results for the orifice with the 0.4 contraction ratio.
| Q (m3/h) | P1 (bar) | P2 (bar) | P3 (bar) | L (cm) | ASL (dB) |
|---|---|---|---|---|---|
| 8 | 0.4 | 0.8096 | 0.9096 | 0 | 74.55 |
| 10 | 0.59 | 0.7596 | 0.9096 | 0 | 76.3 |
| 12 | 0.68 | 0.7196 | 0.8966 | 0 | 77.2 |
| 14 | 0.9 | 0.6496 | 0.8836 | 0 | 85.25 |
| 16 | 1.28 | 0.5196 | 0.8706 | 0 | 93.1 |
| 18 | 1.6 | 0.4496 | 0.8576 | 5 | 99.9 |
| 20 | 2.1 | 0.3496 | 0.8576 | 8 | 101.7 |
| 22 | 2.5 | 0.2696 | 0.8836 | 10 | 102.55 |
| 24 | 3.1 | 0.1146 | 0.8836 | 17 | 104.1 |
| 26 | 3.8 | 0.0496 | 0.8836 | 26 | 104.85 |
| 28 | 4.6 | 0.0496 | 0.8836 | 95 | 101.7 |
| 28.5 | 4.8 | 0.0496 | 0.8836 | 120 | 102.25 |
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