利用定容燃烧弹高速纹影摄像系统所得到的向外传播球形火焰纹影图片,并结合火焰不稳定性理论分析了掺氢对乙醇-空气预混火焰不稳定性的影响规律.结果表明,随着掺氢量的增加,在稀薄混合时火焰不稳定性增加,表现为前锋面的裂纹加剧;而在浓混合时呈现相反的变化趋势.可燃混合物的热扩散不稳定性与综合不稳定性随掺氢量的变化趋势一致;流体力学不稳定性不影响热扩散不稳定性与综合不稳定性的变化趋势,它随掺氢量的变化取决于火焰厚度和热膨胀比的综合变化.
参考文献
[1] | Shuofeng Wang;Changwei Ji;Bo Zhang .Effect of hydrogen addition on combustion and emissions performance of a spark-ignited ethanol engine at idle and stoichiometric conditions[J].International journal of hydrogen energy,2010(17):9205-9213. |
[2] | Syed Yousufuddin;Syed Nawazish Mehdi;Mohammad Masood .Performance and Combustion Characteristics of a Hydrogen-Ethanol-Fuelled Engine[J].Energy & Fuels,2008(5):3355-3362. |
[3] | Performance and exhaust emission characteristics of a spark ignition engine using ethanol and ethanol-reformed gas[J].Fuel,2010(8):P.2118. |
[4] | Jomaas G;Law CK;Bechtold JK .On transition to cellularity in expanding spherical flames[J].Journal of Fluid Mechanics,2007(0):1-26. |
[5] | J. K. Bechtold;M. Matalon .The dependence of the Markstein length on stoichiometry[J].Combustion and Flame,2001(1/2):1906-1913. |
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