Effects of Intake Port Geometry on the Performance of an SI Engine

Selvaraj, Balan Mariappan; Sridhara, S. N.; Indraprakash, G.; Senthilkumar, A.; Pangaonkar, Arvind

doi:10.4271/2011-32-0506

Cited by 9 publications

(14 citation statements)

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“…Some studies [9,10,11,14,16,18] included intake port, valve, and cylinder; one study [17] included extra "bell mouth," and one study [12] proposed "complete computation domain," including the inlet duct, manifold, plenum, and ports and partially included adjacent ports, valves, and the cylinder to replicate the actual engine.…”

Section: Introductionmentioning

confidence: 99%

“…Although many articles related to steady-state intake port fiow simulation are available [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], many numerical details that affect solution accuracy were not presented or discussed. This report is an attempt to address the issue, in particular, effects of flow box orientation, upstream/downstream-plenum shape and size, and details of mesh topology.…”

Section: Introductionmentioning

confidence: 99%

“…Examples of comparison between measured and calculated steady-state discharge coefficient and/or flow rate at different valve lifts included: straight port versus swirl port [9]; axisymmetric inlet port/valve [10]; two direct inlet port of a four-valve gasoline engine [10]; one curved inlet port [11]; port 1 versus port 2 of a diesel engine [12]; intake port of a four-valve gasoline engine [13]; vertical port of a small gasoline engine [14]; intake ports of a heavy-duty diesel engine [15]; intake port of a single cylinder, four-stroke, and air-cooled gasoline engine [16]; effect of different pressure across the inlet port and valve [17,18]; effect of turbulence model [13,17]; and effect of different CFD software [17].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pitfalls for Accurate Steady-State Port Flow Simulations

Yang¹,

Chen²,

Kuo

2013

Journal of Engineering for Gas Turbines and Power

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Steady-state port flow simulations were carried out with a commercial three-dimensional (3D} computational fluid dynamics (CFD) code using Cartesian mesh with cut cells to study the prediction accuracy. The accuracy is assessed by comparing predicted and measured mass-flow rate and swirl and tumble torques at various valve lifts using different boundary condition setup and mesh topology relative to port orientation. The measured data are taken from standard steady-state flow bench tests of a production intake pott. The predicted mass-flow rates agree to within 1% with the measured data between the intermediate and high valve lifts. At low valve lifts, slight overptediction in mass-flow rate can be observed. The predicted swirl and tumble torques are within 25% of the flow bench measwements. Several meshing parameters were examined in this study. These include: inlet plenum shape and outlet plenum/extension size, embedded sphere with varying minimum mesh size,flner meshes on port and valve surface, orientation of valve, and port centerline relative to the mesh lines. For all model orientations examined, only the mesh topology with the valve axis aligned closely with the mesh lines can capture the mass-flow rate drop for very high valve lifts due to flow separation. This study further demonstrated that it is possible to pet form 3D CFD flow analyses to adequately simulate steady-state flow bench tests.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pitfalls for Accurate Steady-State Port Flow Simulations

Yang¹,

Chen²,

Kuo

2013

Journal of Engineering for Gas Turbines and Power

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“…has the ability to determine the equivalent ratio from 0.62 to 1. 10. It has an uncertainty of 0.1 AFR.…”

Section: A2 Laboratory Test Cellmentioning

confidence: 99%

“…This fuel conversion efficiency (η f ) is calculated with Equation (1.1), where P is power,ṁ f is the mass flow rate of fuel, and Q LHV is the lower heating value of fuel. To help achieve the CAFE standards, there is continuous research to improve the overall fuel conversion efficiency in a number of different areas including friction reduction [7,8,9], volumetric efficiency (η v ) improvements [10,11,12,13], advanced combustion systems [14,15,16,17,18], and waste heat recovery (WHR) [19,20,21,22]. By increasing the fuel conversion efficiency and meeting the CAFE standards, the depletion of the global fuel supply could be decelerated and the fuel expenditure by the end user could be decreased.…”

Section: Lists Of Abbreviationsmentioning

confidence: 99%

Novel Automotive Waste Heat Recovery Techniques

Armstead¹

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In-Cylinder Flow Correlations Between Steady Flow Bench and Motored Engine Using Computational Fluid Dynamics

Yang¹,

Kuo²,

Güralp³

et al. 2017

Journal of Engineering for Gas Turbines and Power

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Intake port flow performance plays a substantial role in determining the volumetric efficiency and in-cylinder charge motion of a spark-ignited engine. Steady-state flow bench and motored engine flow computational fluid dynamics (CFD) simulations were carried out to bridge these two approaches for the evaluation of port flow and charge motion (such as discharge coefficient, swirl/tumble ratios (SR/TR)). The intake port polar velocity profile and polar physical clearance profile were generated to evaluate the port performance based on local flow velocity and physical clearance in the valve-seat region. The measured data were taken from standard steady-state flow bench tests of an intake port for validation of CFD simulations. It was reconfirmed that the predicted discharge coefficients and swirl/tumble index (SI/TI) of steady flow bench simulations have a good correlation with those of motored engine flow simulations. Polar velocity profile is strongly affected by polar physical clearance profile. The polar velocity inhomogeneity factor (IHF) correlates well with the port discharge coefficient, swirl/tumble index. Useful information can be extracted from local polar physical clearance and velocity, which can help for intake port design.

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Effects of Intake Port Geometry on the Performance of an SI Engine

Cited by 9 publications

References 0 publications

Pitfalls for Accurate Steady-State Port Flow Simulations

Pitfalls for Accurate Steady-State Port Flow Simulations

Novel Automotive Waste Heat Recovery Techniques

In-Cylinder Flow Correlations Between Steady Flow Bench and Motored Engine Using Computational Fluid Dynamics

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