Congruent modelling and experimental investigation to gain insight into the transients associated with the hybridized SI-HCCI-SI engine operation

一致的建模和实验研究，以深入了解与混合 SI-HCCI-SI 发动机运行相关的瞬态

• 批准号: EP/D068703/1
• 负责人: Markus Kraft
• 金额: $ 54.58万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FD068703%2F1
• 关键词: Congruent; modelling; experimental; investigation; gain

The main aim of the work is to gain a better insight into the operation of near-future advanced internal combustion engine strategies. Such understanding is vital for the development of high-efficiency, ultra-low-emissions engines to meet environmental regulations. For example, the European automotive manufacturers have committed to reduce fleet average CO2 emissions to 140g/km by 2008, with 120g/km projected by 2012. Hybridized SI-HCCI-SI engine technology is a potential solution towards achieving such targets in improving fuel consumption and developing near-zero emissions vehicles. Such hybridized operation could enable a reduction in UK CO2 levels of ~0.7million metric tons per annum (for a representative 2.0 l gasoline engine size). Furthermore, the benefits of 99% reduction (c.f. SI) in NOx emissions and virtually no soot emissions during HCCI mode of operation can be realised with this technology. In addition to experimental research, computational modelling has been utilized by the research community to gain insight into the transients associated with such a hybridized engine operation. However, the existing models are empirical in nature and rely on profiles from experiments. This may also be the reason for the absence of numerical analysis to investigate the effect of the complex and dynamic transient phenomena on the regulated emissions. The proposed research involves the development of an advanced, predictive phenomenological model to simulate the SI-HCCI-SI engine transients. The model will be validated against measurements and further improved with the help of some new experiments suggested in this proposal. The proposed work comprises of three parts: 1) Development of a novel computational model to account for spontaneous multi point ignition (HCCI-like) as well as premixed flame propagation (SI-like) during the transients. The model includes detailed chemical kinetics description and accounts for inhomogeneities in composition and temperature, thus proving beneficial in understanding the impact of the transient processes on CO, HC and NOx emissions. 2) Understanding transient-like operation by carrying out cost-effective experiments involving operating conditions representative of the complex transient phenomena. These measurements will also be used in validating the formulated model. 3) Model validation against experimental results obtained from fully variable valve timing (FVVT) capable SI-HCCI-SI transient engine operation. Overall, this congruent experimental and modelling approach involves sharing the know-how and expertise between academic research and industrial partners aimed at realising ultra-low emissions engine performance.

这项工作的主要目的是为了更好地了解不久的将来先进的内燃机战略的运作。这种理解对于开发高效率、超低排放的发动机以满足环境法规至关重要。例如，欧洲汽车制造商已承诺到2008年将车队平均二氧化碳排放量减少到140克/公里，预计到2012年将减少到120克/公里。混合动力SI-HCCI-SI发动机技术是实现这些目标的潜在解决方案，以改善燃料消耗和开发近零排放车辆。这种混合操作可以使英国每年减少约70万公吨的CO2水平（对于代表性的2.0升汽油发动机尺寸）。此外，减少99%的益处（参见SI），并且在HCCI操作模式期间几乎没有碳烟排放。除了实验研究之外，研究界还利用计算建模来深入了解与这种混合发动机操作相关的瞬态。然而，现有的模型本质上是经验性的，并且依赖于来自实验的轮廓。这也可能是缺乏数值分析来研究复杂和动态瞬态现象对调节排放的影响的原因。拟议的研究涉及一个先进的，预测的现象学模型的发展，以模拟SI-HCCI-SI发动机瞬态。该模型将根据测量结果进行验证，并在本提案中建议的一些新实验的帮助下进一步改进。提出的工作包括三个部分：1）开发一种新的计算模型，以解释自发多点点火（HCCI样）以及预混火焰传播（SI样）在瞬态过程中。该模型包括详细的化学动力学描述和帐户的组成和温度的不均匀性，从而证明有利于理解瞬态过程对CO，HC和NOx排放的影响。2)通过进行具有成本效益的实验来了解瞬态操作，这些实验涉及复杂瞬态现象的典型操作条件。这些测量也将用于验证公式化模型。3)根据从完全可变气门正时（FVVT）能够实现SI-HCCI-SI瞬态发动机操作获得的实验结果进行模型验证。总的来说，这种一致的实验和建模方法涉及学术研究和工业合作伙伴之间的知识和专业知识共享，旨在实现超低排放发动机性能。

项目成果

Modelling soot formation in a DISI engine

模拟 DISI 发动机中的烟灰形成

• DOI: 10.1016/j.proci.2010.07.039
• 发表时间: 2011
• 期刊: Proceedings of the Combustion Institute
• 影响因子: 3.4
• 作者: Etheridge J

Influence of Injection Timing and Piston Bowl Geometry on PCCI Combustion and Emissions

喷射正时和活塞碗几何形状对 PCCI 燃烧和排放的影响

• DOI: 10.4271/2009-01-1102
• 发表时间: 2009
• 期刊: SAE International Journal of Engines
• 影响因子: 1.2
• 作者: Cao L

A Fast Detailed-Chemistry Modelling Approach for Simulating the SI-HCCI Transition

模拟 SI-HCCI 转变的快速详细化学建模方法

• DOI: 10.4271/2010-01-1241
• 发表时间: 2010
• 作者: Etheridge J

Modelling cycle to cycle variations in an SI engine with detailed chemical kinetics

• DOI: 10.1016/j.combustflame.2010.08.006
• 发表时间: 2011
• 期刊: Combustion and Flame
• 影响因子: 4.4
• 作者: Jonathan E. Etheridge;S. Mosbach;M. Kraft;Hao Wu;N. Collings

Studying the Influence of Direct Injection on PCCI Combustion and Emissions at Engine Idle Condition Using Two Dimensional CFD and Stochastic Reactor Model

利用二维 CFD 和随机反应器模型研究发动机怠速工况下直喷对 PCCI 燃烧和排放的影响

• DOI: 10.4271/2008-01-0021
• 发表时间: 2008
• 作者: Cao L