In-cylinder airflow of automotive engine by quasi-direct numerical simulation

Sukegawa, Yoshihiro; Nogi, Toshiharu; Kihara, Yusuke

doi:10.1016/s0389-4304(03)00008-0

Cited by 18 publications

(12 citation statements)

References 2 publications

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“…It is well known that experimental tests are very expensive and it is difficult to visualize the different in-cylinder physical phenomena. That is why, CFD tools are mostly used to develop the ICE technology (Sukegawa et al 2003). Besides, we have used ICE-CFD analysis system to investigate the aero-thermal phenomena inside the combustion chamber for cold flow simulation.…”

Section: Cfd Processmentioning

confidence: 99%

“…Hence, they are compared to the LDV experimental results of Payri et al (1996) in order to check the grid independence. The air flow profile inside the combustion chamber linearly evolved with the engine speed (Sushma et al 2013 andSukegawa et al 2003). So, to obtain an accurate comparison of the numerical results, it is suitable to normalize the radial velocity by the mean piston speed Vp.…”

Section: Mesh Independence Testmentioning

confidence: 99%

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In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

Moussa

Ketata

Zied

et al. 2019

JAFM

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Three-dimensional flow simulations of the full cycle for four-valve direct-injection Diesel engine have been carried out with different meshes. The aim of the present study is to establish an extensive CFD investigation of in-cylinder aero-thermal flow of a direct-injection Diesel engine. The ICE-CFD solver is used to examine the unsteady behavior of a realistic engine configuration. Moreover, a layering approach and dynamic mesh model are adopted to generate the grid. The predicted radial velocity and swirl ratio for four different meshes are compared with Laser Doppler Velocimetry measurements and with numerical results from the literature. The comparison shows that the obtained results with the fine mesh present a good agreement with the experimental measurements along the compression phase and at the start of the expansion phase. In addition, these results are more accurate than the predicted results reported in the literature. Furthermore, CFD analysis is presented for the whole cylinder volume with regard to several parameters such as velocity field, swirling, tumble flow, pressure and temperature distributions. These results prove that in-cylinder CFD simulation gives reasonably accurate results that enable enhanced knowledge of the aero-thermal flow of full engine cycle.

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Section: Cfd Processmentioning

confidence: 99%

Section: Mesh Independence Testmentioning

confidence: 99%

In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

Moussa

Ketata

Zied

et al. 2019

JAFM

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show abstract

“…< /?0 or at wall (16) Here p (Cip) is given by interpolating the pressure in terms of the grid coordinates to that in terms of the particle coordinates; the interpolation is done using Eq. < /?0).…”

Section: Liquid-column-breakup Simulationmentioning

confidence: 99%

“…Furthermore, Reitz's model [10] was used to simulate breakup of droplets in the air/fuel mixture region, and the airflow was simu lated by a finite volume method (the Cartesian-grid method) [16]; turbulence flow was simulated by quasi-direct numerical simulation on the basis of Kawamura and Kuwahara's scheme (third-order resolution) [17]. Furthermore, Reitz's model [10] was used to simulate breakup of droplets in the air/fuel mixture region, and the airflow was simu lated by a finite volume method (the Cartesian-grid method) [16]; turbulence flow was simulated by quasi-direct numerical simulation on the basis of Kawamura and Kuwahara's scheme (third-order resolution) [17].…”

Section: Air/fuel Mixture Simulationmentioning

confidence: 99%

Short Spray Penetration for Direct Injection Gasoline Engines With Secondary-Drop-Breakup Simulation Integrated With Fuel-Breakup Simulation

Ishii

Ehara

Abe

et al. 2014

Journal of Engineering for Gas Turbines and Power

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Direct injection gasoline engines have both better engine power and fuel efficiency than port injection gasoline engines. However, direct injection gasoline engines also emit more particulate matter (PM) than port injection gasoline engines do. To decrease PM, fuel injectors with short spray penetration are required. More effective fuel injectors can be preliminarily designed by numerically simulating fuel spray. We previously developed a fuel-spray simulation. Both the fuel flow within the flow paths of an injector and the liquid column at the injector outlet were simulated by using a grid method. The liquid-column breakup was simulated by using a particle method. The motion of droplets within the air/fuel mixture (secondary-drop-breakup) region was calculated by using a discrete droplet model (DDM). In this study, we applied our fuel-spray simulation to sprays for the direct injection gasoline engines. Simulated spray penetrations agreed relatively well with measured spray penetrations. Velocity distributions at the outlet of three kinds of nozzles were plotted by using a histogram, and the relationship between the velocity distributions and spray penetrations was studied. We found that shrinking the high-speed region and making the velocity-distribution uniform were required for short spray penetration.

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“…Experimental investigations and numerical simulations have substantially improved understanding of in-cylinder flow processes [1][2][3][4][5]. It is now well known that combustion chamber shape and inlet geometry influence the turbulent flow field, emissions, fuel economy and the lean operating limit of an engine.…”

Section: Introductionmentioning

confidence: 99%

The effects of tumble and swirl flows on flame propagation in a four-valve S.I. engine

Lee

Bae

Kang

2007

Applied Thermal Engineering

107

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In-cylinder airflow of automotive engine by quasi-direct numerical simulation

Cited by 18 publications

References 2 publications

In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

In-Cylinder Aero-Thermal Simulation of Compression Ignition Engine: Using a Layering Meshing Approach

Short Spray Penetration for Direct Injection Gasoline Engines With Secondary-Drop-Breakup Simulation Integrated With Fuel-Breakup Simulation

The effects of tumble and swirl flows on flame propagation in a four-valve S.I. engine

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