Abstract
Igniting diesel engines under low-temperature and low-density conditions is difficult. Experiments under the injection pressures of 40, 80, 120, and 160 MPa were performed at 723 K and 14 kg/m3 in a constant volume vessel to solve the problem of difficult diesel engine ignition. Flame images were captured through a high-speed direct imaging technique. Blue flame was distinguished from hot flame, and two-color analysis was implemented. Results showed that flame take-off length increased with the increase in injection pressure, whereas flame temperature decreased. Therefore, the blow-off effect and the evaporation cooling effect intensified with the increase in injection pressure, and high injection pressure was not conducive for stable flame combustion under low-temperature and low-density conditions.
| Translated title of the contribution | Effect of injection pressure on the flame characteristics of diesel spray under low-temperature and low-density conditions |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 1128-1133 |
| Number of pages | 6 |
| Journal | Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University |
| Volume | 40 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 5 Jun 2019 |