Research Article
Study on Premixed Combustion in a Diesel Engine with Ultra-multihole Nozzle
Table 6
Effect of swirl ratio on engine performance.
| Operating condition | Swirl ratio | Injection pressure MPa | Injection starting point °CA ATDC | EGR rate % | Soot g/kW·h | NOx g/kW·h | HC g/kW·h | CO g/kW·h | BSFC g/kW·h |
| B | 2.8 | 80 | 3 | 15 | 0.0049 | 2.86 | 14.05 | 24.36 | 308.0 | 3.6 | 110 | −1.5 | 80 | 0.0012 | 1.49 | 5.08 | 20.03 | 274.8 | 4.5 | 110 | −2 | 40 | 0.0009 | 1.04 | 5.20 | 20.21 | 277.9 |
| D | 3.6 | 110 | 2 | 28 | 0.0402 | 2.48 | 0.53 | 10.15 | 253.4 | 4.5 | 110 | 2 | 28 | 0.1081 | 2.69 | 0.62 | 11.86 | 269.8 |
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