Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer
Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer
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DOI：
10.1016/j.energy.2016.08.065
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发表时间：
2016-12
期刊：
影响因子：
9
通讯作者：
Stijn Broekaert;J. Demuynck;T. D. Cuyper;M. D. Paepe;S. Verhelst
中科院分区：
文献类型：
--
作者：
Stijn Broekaert;J. Demuynck;T. D. Cuyper;M. D. Paepe;S. Verhelst
火花点火发动机内燃烧气体到气缸壁的换热是发动机设计中的一个关键因素，因为它影响发动机的效率、功率和排放。因此，为了准确地模拟发动机的换热过程，为发动机的设计和优化提供依据，人们进行了大量的研究。这些模型被发现对与传统化石燃料具有显著不同气体性质的燃料提供了不准确的预测。这表明这些模型要么没有正确地包含气体属性，要么在其公式中缺少一些重要的属性。为了建立一个通用的(不依赖于燃料的)换热模型，需要对具有不同性质的多种燃料进行新的测量。设计这样的实验需要对影响热传递的因素及其相互作用有透彻的了解。本文对火花点火发动机的换热测量方法进行了综述，以探讨发动机因素对换热的影响。在此基础上，进行了根本原因分析，以确定影响换热的独立因素。然后，这些因素被用于根据实验设计方法设置两个实验，该方法允许以一致的方式调查不同气体属性和发动机设置对热传递的影响。这些测量结果在文献[1]中进行了讨论，在附文[2]中讨论了关于燃烧操作的测量结果。
The heat transfer from the combustion gases to the cylinder walls inside a spark ignition engine is a key factor in an engine's design, due to its influence on the engine's efficiency, power and emissions. Therefore a lot of research has been conducted in order to accurately model the heat transfer, for engine design and optimization purposes. These models have been found to provide inaccurate predictions for fuels which have significantly different gas properties compared to traditional fossil fuels. This indicates that the models either do not properly include gas properties, or are missing some important properties in their formulation. In order to construct a general (“fuel-independent”) heat transfer model, new measurements need to be executed, with multiple fuels that have different properties. Designing such an experiment requires a thorough understanding of the factors influencing the heat transfer and their interactions. In this paper a literature review is presented of heat transfer measurements in spark ignition engines in order to investigate the effect of the engine factors on the heat transfer. Based on this review, a root cause analysis is conducted to identify the independent factors that affect heat transfer. These factors are then used to set up two experiments according to a Design of Experiments methodology that allows the investigation of the effect of different gas properties and engine settings on the heat transfer in a consistent way. The results of these measurements for motored operation are discussed in [1] and for fired operation in a companion paper [2].