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| Study on Spray and Combustion Characteristics of Pilot-Main Injection Under Two-Injection Strategy |
| DOI：10.13949/j.cnki.nrjgc.2018.05.002 |
| Key Words:constant volume combustion chamber two injection spray cone angle ignition delay time flame lift-off length |
| Author Name | Affiliation | | FANG Mingcheng, WANG Qian, HE Zhixia, WANG Shengquan, ZHU Jiangtao | 1.School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
2.Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China |
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| Abstract:Based on a constant volume combustion chamber, the effects of pilot and main injections of two-injection strategy as well as the dwell time between them on spray and combustion were studied. The spray was studied by using Mie-scattering imaging technique, and the combustion was investigated with the flame luminosity imaging and OH chemiluminescence techniques. The result shows that, compared with one-injection strategy, the ignition location of the main injection of two-injection strategy is closer to injector, and the ignition delay time and flame lift-off length are shorter. When using two-injection strategy, the spray cone angle of the main injection decreases and the ignition delay time increases with the increase of the dwell time. Besides, the dwell time has no obvious influence on the ignition location and flame lift-off length. The flame luminosity is the weakest when the dwell time is 0.9 ms and the strongest when the dwell time is 1.2 ms. |
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