Analysis of Combustion Chamber Temperature and Heat Flux in a DOHC Engine

Choi, Gyeung Ho; Choi, Kyu Hoon; Lee, J. T.; Song, Youngsik; Ryu, Yuji; Cho, Jung‐Wook

doi:10.4271/970895

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…These results were confirmed by the cycle simulation results of Heywood [43]. Choi et al [39] found that the wall temperature and the temperature swing of the cylinder head and valves increased as well. When the load was increased from 20% to 100%, the 260 temperature swing of the cylinder head increased from 5K to 9K.…”

Section: Influence Of Engine Loadsupporting

confidence: 80%

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Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Broekaert

Demuynck

Cuyper

et al. 2016

Energy

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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].

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Section: Influence Of Engine Loadsupporting

confidence: 80%

“…Heywood [43] confirmed this trend with thermodynamic cycle simulations. Choi et al [39] showed that the measured wall surface temperature of the cylinder head, piston and valves increased with engine speed as well. On the other hand, the temperature swing (i.e.…”

Section: Influence Of Engine Speedmentioning

confidence: 99%

Heat transfer in premixed spark ignition engines part I: Identification of the factors influencing heat transfer

Broekaert

Demuynck

Cuyper

et al. 2016

Energy

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show abstract

“…The validity of the approach can be checked by performing heat release analysis and confirming that adding heat loss to calculated net heat release satisfies energy balance. This is in great contrast to SI and CI engines, where it is difficult to get the area-averaged heat flux based on local measurements because of very high spatial variations [11,27]. In the case of SI combustion, the flame front separates the chamber into a burned hot zone and a much cooler unburned zone.…”

Section: Introductionmentioning

confidence: 94%

New Heat Transfer Correlation for an HCCI Engine Derived from Measurements of Instantaneous Surface Heat Flux

Chang

Güralp

Filipi

et al. 2004

SAE Technical Paper Series

402

244

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An experimental study has been carried out to provide qualitative and quantitative insight into gas to wall heat transfer in a gasoline fueled Homogeneous Charge Compression Ignition (HCCI) engine. Fast response thermocouples are embedded in the piston top and cylinder head surface to measure instantaneous wall temperature and heat flux. Heat flux measurements obtained at multiple locations show small spatial variations, thus confirming relative uniformity of incylinder conditions in a HCCI engine operating with premixed charge. Consequently, the spatially-averaged heat flux represents well the global heat transfer from the gas to the combustion chamber walls in the premixed HCCI engine, as confirmed through the gross heat release analysis. Heat flux measurements were used for assessing several existing heat transfer correlations. One of the most popular models, the Woschni expression, was shown to be inadequate for the HCCI engine. The problem is traced back to the flame propagation term which is not appropriate for the HCCI combustion. Subsequently, a modified model is proposed which significantly improves the prediction of heat transfer in a gasoline HCCI engine and shows very good agreement over a range of conditions.

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CFD–CHT calculation method using Buckingham Pi-Theorem for complex fluid–solid heat transfer problems with scattering boundary conditions

Hölz¹,

Böhlke

Krämer³

2018

Automot. Engine Technol.

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Analysis of Combustion Chamber Temperature and Heat Flux in a DOHC Engine

Cited by 6 publications

References 8 publications

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

New Heat Transfer Correlation for an HCCI Engine Derived from Measurements of Instantaneous Surface Heat Flux

CFD–CHT calculation method using Buckingham Pi-Theorem for complex fluid–solid heat transfer problems with scattering boundary conditions

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