| 论文标题 |
Laminar flame characteristics of iso-octane-n-butanol blends-air mixtures at elevated temperatures (PDF) |
| 作者 |
Zhang XY, Tang CL, Yu HB, Li QQ, Gong J, Huang ZH |
| 发表/完成日期 |
2013-04-20 |
| 期刊名称 |
Energy & Fuels |
| 期卷 |
2013, 27(4): 2327-2335 |
| 相关文章 |
Laminar flame characteristics of iso-octane-n-butanol blend-air mixtures at elevated temperatures.pdf
|
| 论文简介 |
In this work, laminar flame speeds and Markstein lengths of iso-octane/n-butanol-air mixtures were measured using the outwardly expanding spherical flame method and high-speed schlieren photography over a wide range of equivalence ratios and blending ratios of n-butanol at elevated initial temperatures. Results show that laminar flame speeds of fuel blends slightly increase with the increase of blending ratio of n-butanol. The effect of blending ratio on laminar flame speed of fuel blends was mechanistically interpreted through examining the thermodynamic and diffusive property, as well as the overall oxidation kinetics. The measurements on the burned gas Markstein length show a generalized behavior. There exists a minimum absolute Markstein length at the critical equivalence ratio *, under which the stretch effect on the flame propagating speed is minimized. At the equivalence ratio less than *, Markstein length is decreased with increasing the blending ratio of n-butanol, indicating that the addition of n-butanol reduces the diffusional thermal stability of the blend while at the equivalence ratio larger than *, Markstein length increases with the increase of blending ratio of n-butanol. This experimental observation on the Markstein length is consistent with the theoretical investigation. A correlation of laminar flame speed of n-butanol/iso-octane blend as a function of equivalence ratio, temperature and blending ratio of n-butanol was given on the basis of experimental data. |
(创新港)
