An experimental analysis of the turbulent structures generated by the intake port of a DISI-engine

Kapitza, L.; Imberdis, O.; Bensler, Henry; Willand, Jürgen; Thévenin, Dominique

doi:10.1007/s00348-009-0736-0

Cited by 44 publications

(16 citation statements)

References 14 publications

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“…POD was firstly introduced to the turbulence research by Lumley [23]. Recently, the POD method has been adopted in the engine in-cylinder applications [24][25][26][27][28][29]. This method can provide a deeper insight into the in-cylinder physical and chemical phenomena including CCV.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the temporal evolution and spatial variation of in-cylinder engine fuel spray characteristics

Qin

Hung

2015

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Investigation of the temporal evolution and spatial variation of in-cylinder engine fuel spray characteristics

Qin

Hung

2015

Energy Conversion and Management

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“…Other experts have explored the possibility of developing an admittance manifold in order to grow the performance of PICEs through numerical simulation in different programs [6][7][8]. It has been stated that a refined configuration of admittance and final systems can grow the airflow rate in the system by 10.5-25.2%, which also leads to increased PICE power [9][10][11]. Thus, the authors assess the influence of the GaAS's configuration on the processes taking place inside the cylinder.…”

Section: Introductionmentioning

confidence: 99%

Integrated modernization of the gas-and-air system of a turbocharged diesel engine (21/21)

2020

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Improving the exploitative and environmental performance of piston engines (PICE) is an urgent task for many engineers and scientists. The article presents the results of the upgrade of a gas-and-air system of a diesel PICE, carried out through changing the turbocharging system’s configuration and modernizing the design of the admittance collector. The authors present a review of studies on the given subject and a description of the object of the research. The study was conducted on the basis of bench tests at a manufacturing plant and mathematical modeling using ACTUS program. The results of experimental studies on the main indicators of a basic and upgraded PICEs are presented. The gas exchange processes in the PICE under examination were studied in detail using mathematical modeling. For the given diesel PICE, improvement of the gas-and-air system leads to a growth in charging efficiency by 2.45-3.92%, a decrease in scavenging factor by 3.11-6.31% and a reduction of specific fuel consumption up to 3.33%. In the conclusion, new directions for increasing the efficiency of the given PICE are offered.

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“…In the current study, Stereoscopic PIV measurements were carried out at the central vertical tumble plane inside an engine cylinder to acquire the instantaneous velocity vector fields of the in-cylinder flow for two experimental conditions, i.e., (1) different valve lift, and (2) different pressure difference across the air intake valves. Here, as also used by Kapitza et al [23] and Hao Chen et al [15,21,24], the instantaneous velocity vector fields acquired from Stereo-PIV measurements were arranged firstly in the form of synthetic velocity fields in order to extract some fundamental properties of the POD technique (avoiding the complexities of real flow). These data were used to reveal how the physical properties of coherent structures were captured and distributed among the POD modes, in addition to illustrate the difference between subtracting and non-subtracting the ensemble average prior to conducting POD on datasets.…”

Section: Introductionmentioning

confidence: 99%

On the Application of Proper Orthogonal Decomposition (POD) for In-Cylinder Flow Analysis

et al. 2018

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Proper orthogonal decomposition (POD) is a coherent structure identification technique based on either measured or computed data sets. Recently, POD has been adopted for the analysis of the in-cylinder flows inside internal combustion engines. In this study, stereoscopic particle image velocimetry (Stereo-PIV) measurements were carried out at the central vertical tumble plane inside an engine cylinder to acquire the velocity vector fields for the in-cylinder flow under different experimental conditions. Afterwards, the POD analysis were performed firstly on synthetic velocity vector fields with known characteristics in order to extract some fundamental properties of the POD technique. These data were used to reveal how the physical properties of coherent structures were captured and distributed among the POD modes, in addition to illustrate the difference between subtracting and non-subtracting the ensemble average prior to conducting POD on datasets. Moreover, two case studies for the in-cylinder flow at different valve lifts and different pressure differences across the air intake valves were presented and discussed as the effect of both valve lifts and pressure difference have not been investigated before using phase-invariant POD analysis. The results demonstrated that for repeatable flow pattern, only the first mode was sufficient to reconstruct the physical properties of the flow. Furthermore, POD analysis confirmed the negligible effect of pressure difference and subsequently the effect of engine speed on flow structures.

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An experimental analysis of the turbulent structures generated by the intake port of a DISI-engine

Cited by 44 publications

References 14 publications

Investigation of the temporal evolution and spatial variation of in-cylinder engine fuel spray characteristics

Investigation of the temporal evolution and spatial variation of in-cylinder engine fuel spray characteristics

Integrated modernization of the gas-and-air system of a turbocharged diesel engine (21/21)

On the Application of Proper Orthogonal Decomposition (POD) for In-Cylinder Flow Analysis

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