...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Combustion characterization of waste cooking oil and canola oil based biodiesels under simulated engine conditions
【24h】

Combustion characterization of waste cooking oil and canola oil based biodiesels under simulated engine conditions

机译：在模拟发动机条件下废烹饪油和菜籽油基生物柴油的燃烧特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Alternative fuels will come from a variety of feed stocks and refinement processes. Understanding the fundamentals of combustion and pollutants formation processes of these fuels will be useful for their implementation in different combustion systems. In this work, optical diagnostics were performed to waste cooking oil (WCO) and canola oil (CAO) based biodiesel sprays to assess their combustion and soot formation processes. Conventional diesel was used as a reference fuel for comparison with the biodiesels. The experiments were conducted in an optically-accessible constant-volume combustion chamber (CVCC) with simulated compressionignition engine conditions, with different degree of exhaust gas recirculation. The liquid length and lift-off length results indicate that there was no significant interaction between the liquid phases of the fuels and their combustion regions. The flame lift-off lengths were found to be affected by both the chemical and physical properties of the fuels. It was observed that a larger difference between the lift-off length and the first-luminosity distance was correlated with lesser downstream soot formation, although the molecular structure of the fuel was found to affect the process too. Assessing the sooting and combustion characteristics of the biodiesel and diesel flames across the varied ambient O-2 atmospheres revealed that the estimated soot contents of the biodiesel and diesel flames peaked at 15 and 21 vol.% O-2 concentration, respectively. The peak soot contents of the WCO and CAO biodiesel flames were found be comparable, but lower than that of diesel, across the various O-2 environment. The results also demonstrated that the biodiesels have higher normalized peak pressure values than diesel at all O-2 conditions. Two-color pyrometry data demonstrated that the measured soot temperature and soot KL factors of the flames were similar at 15 and 21 vol.% O-2, but varied with further reduction of ambient O-2 concentration. Variations in the combustion duration and flame area were found to be fuel dependent.
机译：替代燃料将来自各种原料和提炼过程。了解这些燃料的燃烧原理和污染物形成过程将有助于其在不同燃烧系统中的实施。在这项工作中，对废食用油（WCO）和菜籽油（CAO）的生物柴油喷雾剂进行了光学诊断，以评估其燃烧和烟灰形成过程。常规柴油用作与生物柴油比较的参考燃料。实验是在光学可访问的恒定容积燃烧室（CVCC）中进行的，该燃烧室具有模拟的压缩点火发动机工况，并具有不同程度的废气再循环。液体长度和提离长度结果表明，燃料的液相与其燃烧区域之间没有显着的相互作用。发现火焰剥离长度受燃料的化学和物理性质的影响。观察到，尽管发现燃料的分子结构也影响该过程，但剥离长度和第一发光度距离之间的较大差异与较少的下游烟灰形成相关。评估生物柴油和柴油火焰在不同的O-2气氛中的烟ing和燃烧特性表明，估计的生物柴油和柴油火焰的烟灰含量分别在15和21％（体积）的O-2浓度达到峰值。在各种O-2环境中，发现WCO和CAO生物柴油火焰的烟灰峰值含量是可比的，但低于柴油。结果还表明，在所有O-2条件下，生物柴油均具有比柴油更高的归一化峰值压力值。两色高温测定法数据表明，在15和21％（体积）的O-2下，火焰的烟灰温度和KL烟灰KL系数相似，但随着环境O-2浓度的进一步降低而变化。发现燃烧持续时间和火焰面积的变化取决于燃料。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号