Thermal analysis of an SI engine piston using different combustion boundary condition treatments

Esfahanian, Vahid; Javaheri, Ahmad; Ghaffarpour, M.

doi:10.1016/j.applthermaleng.2005.05.002

Cited by 98 publications

(50 citation statements)

References 6 publications

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“…As expected, temperature decreases from the inner wall, in contact with combustion gases, to the fins walls in contact with ambient air. Finally, the temperature distribution shown in Figure 6 for the piston is in good agreement with that presented by Heywood for SI engines [18] and that obtained by previous researchers such as Esfahanian et al [11] or Morel and Keribar [12].…”

Section: -Results and Discussionsupporting

confidence: 79%

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Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Illán-Gómez

Alarcón²

2010

Applied Thermal Engineering

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Section: -Results and Discussionsupporting

confidence: 79%

“…Nevertheless, in most cases, to obtain the heat release, wall temperature or heat transfer rate were imposed [3,4,7,8], or wall temperature was obtained as a function of engine operation parameters [9,10]. Other works [11,12] are mainly focussed on the piston and do not analyse other engine parts.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Illán-Gómez

Alarcón²

2010

Applied Thermal Engineering

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“…Engine component temperatures have been studied while looking at heat transfer characteristics of engines [24][25][26]. From these component temperatures a simple application of unrestrained thermal expansion can be applied using Equation 1.3:…”

Section: Piston Thermal Expansionmentioning

confidence: 99%

Crevice Volume Effect on Spark Ignition Engine Efficiency

Smith¹,

Cheng²,

Heywood³

2014

SAE Technical Paper Series

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A set of experiments and a simulation study are completed to quantify the effect of the piston crevice on engine efficiency. The simulation study breaks down the loss mechanisms on brake efficiency at different displacement volumes (300 -500 cc) and compression ratios (8-20). Experiments focus on indicated efficiencies for a narrow range of compression ratios (9.24-12.57) with different piston crevice volumes. Piston crevice volume is increased in two steps by machining a groove into the piston top land, and is decreased by raising the top ring. Indicated efficiency is measured at various loads (0.4 -1.0 bar MAP), speeds (1500, 2000, 2500 rpm), and coolant temperatures (50'C and 80'C). All data points compared in this study are recorded at MBT timing with a relative air-fuel ratio (k) of 1.For the baseline case (CR = 9.24, speed = 2000 rpm, coolant = 80'C), increased crevice volume results in an indicated efficiency degradation of 0.3-0.5%-points per 1000 mm 3 . This absolute decrease corresponds to a 1.2-1.5% relative decrease for a 100% increase in crevice volume; referenced to the control piston crevice modification. Decreasing crevice volume leads to a gain in indicated efficiency of 2.3-3.5%-points per 1000 mm 3 , which corresponds to a 6.9-11.8% relative increase for a 100% decrease in crevice volume; referenced to the control piston crevice modification.Results of the experimental investigation, when compared across compression ratio, engine speed, and coolant temperature, show that the crevice effect on efficiency is largely independent of these three parameters. Large gains from decreased piston crevice volume prompt renewed discussions on piston top land, top ring, and crown design.

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“…Another disadvantage is the rough discretization considered in the combustion chamber (only one node for the piston and the cylinder head, and two nodes for the cylinder), which appears to be very poor in view of the large temperature differences expected both in the piston [15,16] and between the valves and the cylinder head material [8].…”

Section: Introductionmentioning

confidence: 99%

A Tool for Predicting the Thermal Performance of a Diesel Engine

Torregrosa

Olmeda

Martín

et al. 2011

Heat Transfer Engineering

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Abstract.This paper presents a thermal network model for the simulation of the transient response of diesel engines. The model was adjusted by using experimental data from a completely instrumented engine run under steady-state and transient conditions. Comparisons between measured and predicted material temperatures over a wide range of engine running conditions show a mean error of 7ºC. The model was then used to predict the thermal behavior of a different engine. Model results were checked against oil and coolant temperatures measured during engine warm-up at constant speed and load, and on a New European Driving Cycle. Results show that the model predicts these temperatures with a maximum error of 3ºC.3

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Thermal analysis of an SI engine piston using different combustion boundary condition treatments

Cited by 98 publications

References 6 publications

Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Crevice Volume Effect on Spark Ignition Engine Efficiency

A Tool for Predicting the Thermal Performance of a Diesel Engine

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