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Development of a fast-virtual CFR engine model and its use on autoignition studies
Fuel Processing Technology ( IF 7.5 ) Pub Date : 2021-09-23 , DOI: 10.1016/j.fuproc.2021.107031
Antonio García 1 , Javier Monsalve-Serrano 1 , Rafael Lago Sari 1 , Álvaro Fogué-Robles 1 , Nika Alemahdi 2 , Martin Tunér 2 , Darío López Pintor 3
Affiliation  

Homogenous charge compression ignition engines have been studied as an alternative to the conventional diesel combustion to attain high efficiency with ultra-low NOx and soot emissions for a wide variety of fuels. However, its usage in real applications has been restricted due to the difficulties regarding combustion control and operating range extension. The modification of the fuel characteristics may be a pathway to solve the previous hurdles. Therefore, this research presents a relevant methodology to assess the fuel response to HCCI boundary conditions based on 0-D and 1-D modelling for detailed chemistry solution and state conditions definition, respectively. The results suggest that the methodology can predict the early stages of the fuel oxidation with good accuracy. For the objective of predicting the start of combustion, the best results are obtained using tabulated chemistry when investigating fuels that have pre reactions and a low temperature heat release. As the oxidation process progresses, the deviation of the pressure-temperature trajectory from non-reactive to reactive conditions after the low temperature heat release decreases the predictive capability to some extent. Nonetheless, the methodology outcomes are still valid as a qualitative metric for reactivity determination as well as the intermediate and high temperature ignition delay.



中文翻译:

快速虚拟 CFR 发动机模型的开发及其在自燃研究中的应用

均质充量压燃式发动机已被研究作为传统柴油燃烧的替代方案,以实现高效率,超低 NOx 和烟尘排放量,适用于各种燃料。然而,由于燃烧控制和工作范围扩展方面的困难,它在实际应用中的使用受到了限制。燃料特性的修改可能是解决先前障碍的途径。因此,本研究提出了一种相关的方法来评估燃料对 HCCI 边界条件的响应,该方法基于 0-D 和 1-D 建模,分别用于详细的化学解决方案和状态条件定义。结果表明,该方法可以准确地预测燃料氧化的早期阶段。为了预测燃烧的开始,在研究具有预反应和低温放热的燃料时,使用列表化学可以获得最佳结果。随着氧化过程的进行,低温放热后压力-温度轨迹从非反应状态到反应状态的偏差在一定程度上降低了预测能力。尽管如此,该方法的结果作为反应性测定以及中高温点火延迟的定性指标仍然有效。低温放热后压力-温度轨迹从非反应状态到反应状态的偏差在一定程度上降低了预测能力。尽管如此,该方法的结果作为反应性测定以及中高温点火延迟的定性指标仍然有效。低温放热后压力-温度轨迹从非反应状态到反应状态的偏差在一定程度上降低了预测能力。尽管如此,该方法的结果作为反应性测定以及中高温点火延迟的定性指标仍然有效。

更新日期:2021-09-23
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