Effect of injection pressure on flame characteristics of the biodiesel fuel spray (PDF)
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Effect of injection pressure on flame characteristics of the biodiesel fuel spray (PDF)
- 发表刊物：
- Combust Sci Technol
- 摘要：
- Effect of injection pressure on non-evaporating spray and spray flame characteristics of biodiesel fuel injected by a common rail injection system were studied in a constant volume combustion vessel. Two biodiesels, BDFp (biodiesel from palm oil) and BDFc (biodiesel from cooked oil) were investigated including JIS#2 Diesel. Mie scattering technique was employed to investigate non-evaporating spray characteristics. High speed direct photography and two-color pyrometry were applied for spray flame characteristics. Injection pressures of 100, 200 and 300 MPa and ambient environment typical of diesel engine were used. Non-evaporating spray result showed that biodiesel fuels give longer spray tip penetrations and narrower spray angles especially for BDFp. Integrated flame luminosity of BDFp and BDFc show appreciably lower values compared to that of diesel at injection pressure of 100 MPa, and integrated flame luminosity of BDFp and BDFc is much lower than that of diesel at injection pressures of 200 and 300 MPa. Flame luminosity area follows a similar trend as that of integrated flame luminosity. Two-color pyrometry measurements show that the integrated KL factor of BDFp and BDFc yields appreciably smaller values than that of diesel at injection pressure of 100 MPa, and BDFp and BDFc present much lower values of integrated KL factors than diesel at injection pressure of 200 MPa. At injection pressure of 300 MPa, the soot formation can not be detected for BDFp and BDFc. This indicates that the effect of soot reduction by using BDFp and BDFc is increased at high injection pressures. Flame luminosity and KL factor show the same trend at each injection pressure. Flame temperatures of BDFp and BDFc are lower than that of diesel. A simplified estimate for fuel jet air entrainment was made to interpret trends between different fuels and injection pressures. Analysis indicates that oxygen from fuel molecule plays a significant role on soot formation propensity at injection pressures of 200 and 300 MPa, and poor spray atomization and low mixing rate prohibit the effect of fuel molecule oxygen on soot reduction at injection pressure of 100 MPa. Combination of non-evaporating spray and spray combustion measurements provides a unique opportunity to understand the difference of spray flame characteristics between biodiesels and diesel fuel.
- 合写作者：
- Wang XG, Kuti OA, Zhang W, Nishida K, Huang ZH
- 卷号：
- 2010, 182(10): 1369-1390
- 页面范围：
- 1369-1390
- 是否译文：
- 否
- 发表时间：
- 2010-10-04