Heat Transfer Rates at Gas-Wall Interfaces in Motored Piston Engine

Dao, Kim; Uyehara, O. A.; Myers, P. S.

doi:10.4271/730632

Cited by 38 publications

(19 citation statements)

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“…The higher heat flux to the cylinder walls during the compression and expansion stroke must be caused by 160 a larger temperature difference between the gas and the wall. Dao et al [23] confirmed that the peak heat flux increased with an increasing intake pressure.…”

Section: Influence Of Intake Pressuresupporting

confidence: 56%

“…Hassan [21] and Dao et al [23] demonstrated that the peak values of the heat flux increased with an increasing compression ratio because of a higher incylinder pressure which results in a higher gas temperature. Hassan [21] varied the compression ratio between 8.5 and 11.6, observing a 10 W/cm 2 increase in 175 the peak heat flux (30% increase).…”

Section: Influence Of Compression Ratiomentioning

confidence: 99%

“…Hassan [21] (with a coaxial 165 thermocouple) and Dao et al [23] demonstrated that the peak values of the heat flux increased. Dent and Suliaman [22] (with a thin film sensor) showed that the heat flux was only significantly higher around TDC within an interval of 90…”

Section: Influence Of Engine Speedmentioning

confidence: 99%

“…Hassan [21] varied the compression ratio between 8.5 and 11.6, observing a 10 W/cm 2 increase in 175 the peak heat flux (30% increase). Dao et al [23] increased the compression ratio from 8 to 14, noticing the peak heat flux to change with 25 W/cm 2 (70% increase).…”

Section: Influence Of Compression Ratiomentioning

confidence: 99%

“…Third, the heat flux generated by a tumble flow had the highest intensity because of the high turbulence intensity of the flow. Dao et al [23] recorded the temperature from two RTDs during two consecutive cycles, one with and one without the induction of fresh gases. Their measurements showed that the heat flux of the first cycle was not only higher during the compression stroke, but also during the expansion stroke.…”

Section: Influence Of Intake Flowmentioning

confidence: 99%

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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 Intake Pressuresupporting

confidence: 56%