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| Experimental Study on Characteristics of Gasoline-Diesel Blended Fuel Spray with Split Injection |
| DOI：10.13949/j.cnki.nrjgc.2020.02.001 |
| Key Words:spray penetration length spray cone angle split injection |
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| Abstract:The LED-Mie scattering spray test bench was built based on a constant volume combustion chamber and a high-speed digital camera. The effects of different parameters on liquid spray characteristics of diesel and gasoline/diesel blend of 20% gasoline mass fraction(denoted as G20) with single injection and the main injection of split injection (the main injection) were studied. The results show that: The spray penetration length and spray cone angle of both fuels become greater with the increase of injection pressure of single injection, and the spray penetration length of the G20 is smaller than that of the diesel while the spray cone angle of the G20 is larger than that of the diesel. When the temperature rises from 300 to 850 K, the spray penetration lengths of both fuels decrease and the sprays quickly stabilize. In the cold environment (300 K), the two-fuel spray penetrations of the main injection are basically the same as those of the single injection at the first, but when both sprays develope for 200 μs, the penetration lengths of the main injection are slightly smaller than those of the single injection. The two-fuel spray cone angles of the main injection are slightly larger than those of the single injection, and the interval between pilot injection and main injection of the split injection has little effect on the spray cone angles. |
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