Study on laminar burning characteristics of premixed high-octane fuel-air mixtures at elevated pressures and temperatures (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Study on laminar burning characteristics of premixed high-octane fuel-air mixtures at elevated pressures and temperatures (PDF)
- 发表刊物：
- Energy and Fuels
- 摘要：
- Laminar burning characteristics of high-octane fuel-air premixed mixtures (ETBE, TBA and ethanol) were studied in a constant-volume bomb at various equivalence ratios, initial temperatures and initial pressures by using outwardly propagating spherical flames with high-speed schlieren imaging system. The flame propagation speed, the laminar burning velocity, the Markstein length, the adiabatic flame temperature, the flame thickness and the density ratio were obtained and the influence of equivalence ratio, initial temperature and initial pressure on these parameters was analyzed. The experimental results show that both the unstretched flame propagation speed and unstretched laminar burning velocity increase with the increase of initial temperature and decrease with the increase of initial pressure. Thermal-diffusive instabilities (Markstein length) decrease at higher initial temperature and/or at lower initial pressure. Meanwhile, the unstretched flame propagation speed and the unstretched laminar burning velocity give the maximum values at rich mixture side. The onset of cellular instability was evaluated in terms of the hydrodynamic and diffusional–thermal instabilities, and the reasons for the onset of the cellular structure were analyzed. The results indicate that the propensity for cellular structure is enhanced due to the increase in hydrodynamic and diffusional–thermal instabilities at high initial pressure. Moreover, the flame instability is more sensitive to initial pressure compared to initial temperature.
- 合写作者：
- Gong J, Jin C, Huang ZH, Wu XS
- 卷号：
- 2010, 24(2): 965-972
- 页面范围：
- 965-972
- 是否译文：
- 否
- 发表时间：
- 2010-02-18