Flow field development in a direct injection diesel engine with different manifolds

Paul, Benny; Ganesan, V.

doi:10.4314/ijest.v2i1.59089

Cited by 38 publications

(14 citation statements)

References 13 publications

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“…A. D. Gosman, P. S. Harvey [4] analyzed fuel-air mixing and combustion in an ax symmetric direct injection diesel engine numerically. Benny Paul1 [5] reported a study on the effect of helical, spiral, and helical-spiral combination manifold configuration on air motion and turbulence inside the cylinder of a Direct Injection (DI) diesel engine motored at 3000 rpm. F. Payri [6] studied Three-dimensional flow calculations of the intake and compression stroke of a four-valve direct-injection Diesel engine have been carried out with different combustion chambers.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation and Fatigue Life Estimation of Conventional and Modified Piston of Diesel Engine

Yerrennagoudaru¹,

Manjunatha²

2017

IJMMM

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Abstract-Nowadays engine components are subjected to higher load at elevated temperature than before, due to the increase requirement regarding weight, performance and exhaust gas emission. Thus, Fatigue due to simultaneous thermal and cyclic loading become determinant among the damage forms. At the same time, there is the need to reduce development time and cost to handle the growing number of model variant. Therefore, the development of suitable simulation tools, which reduces the number of necessary component tests, seems to be very rewarding. By using special material (aluminum alloy) we can reduce the fatigue load (Thermal and cyclic) on the piston by using finite element analysis, ANSYS work bench 14.5 version.Index Terms-Diesel engine, fatigue life, conventional piston, modified piston. I. INTRODUCTIONMechanical systems are frequently subjected to cyclic or random loading, inducing damages and fatigue failure of many structural components. One of these structures, namely pressure vessels, is widely used in many important branches of industry, such as power engineering, chemical engineering, and the petrochemical industry.IC engine, in general, are loaded by cyclic pulses and as a result stress concentration zones with plastic strains may appear which induce initiation and propagation of fatigue cracks, leading to fatigue failure. Thus, it is obligatory to estimate the fatigue limit and the fatigue life of pressure vessels to ensure safe service time for these important expensive structures having far-reaching effects after their failure.IC engine Piston are subjected to operating loading conditions which includes pressure, nozzle loads and thermal loads, resulting in the occurrence of stress concentration zones, initiation and propagation of fatigue cracks. Approaches to fatigue life prediction are based on intensity stresses and strains. In the present calculation, fatigue evaluation is carried out using stress based approach.Approach and Assumptions:  ANSYS Meshing is used for meshing the component.  ANSYS 14.5 is used for solving and post-processing.  Material is assumed to be linear and isotropic.  Stress based approach is used for fatigue evaluation. III. METHODOLOGYGeometries can be created top-down or bottom-up. Top-down refers to an approach where the computational domain is created by performing logical operations on primitive shapes such as Piston crown, Skirt of the Piston and Piston bowl. Bottom-up refers to an approach where one first creates vertices (points), connects those to form edges (lines), connects the edges to create faces, and combines the faces to create volumes. Geometries can be created using the same pre-processor software that is used to create the grid, or created using other programs (e.g. CAD, UNI-GRAPHICS). Table I) translational DOF as given in Fig. 1. A. Conventional Piston and Modified Piston (see C. Loading Conditions for Both Conventional Piston and E. Boundary Condition of Modified PistonThe connecting rod support of IC is constrained in all translational DO...

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation and Fatigue Life Estimation of Conventional and Modified Piston of Diesel Engine

Yerrennagoudaru¹,

Manjunatha²

2017

IJMMM

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“…They conclude that spiral-helical-shaped manifold creates higher swirl flow inside the cylinder than spiral manifold. Martins et al [2] performed a CFD study with modified helical inlet port under different value lifts using commercial CFD code Fluent and found that the increase in valve lift decreases the swirl number. It indicates that the valve position also plays an important role in the in-cylinder flows.…”

Section: Introductionmentioning

confidence: 99%

“…Swirling creation inside the engine was earlier studied by various researchers [1][2][3] by changing the parameters like manifold shape, combustion chamber configurations, and piston head shape. There are two ways of enhancing the combustion process thereby increasing the engine thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…It was that this modification enhances the swirling characteristics inside the cylinder. All the geometry shapes and mechanism tried by various researchers [1][2][3][4][5][6], have difficulties in manufacturing point of view and would increase the total vehicle cost. Hence, it is of necessity to have simpler mechanism which would give the same performance at the lower cost.…”

Section: Introductionmentioning

confidence: 99%

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CFD Analysis of Swirl Enhancement in a Direct Injection Diesel Engine with Vortex Generator in Inlet Manifold

Sivakumar

Kumar

2014

Lecture Notes in Mechanical Engineering

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Swirling enhancement is studied numerically for a direct injection diesel engine with vortex generators placed in the inlet manifold using commercial CFD code, ANSYS Fluent TM . The three-dimensional geometry and mesh are created using preprocessor ANSYS ICEM. Simulations have been carried out to investigate the effect of vortex generator in inlet manifold for a single cylinder engine. Transient flow characteristics inside the engine cylinder for the intake stroke with RNG k-e turbulent model are studied and the results are presented in terms of swirling velocity component, swirl number, and turbulent kinetic energy. It is observed that the modified inlet manifold creates uniform mixing inside the engine cylinder which is essential for effective combustion for diesel engine. Results show that it could be used as a simple and effective swirl creating mechanism in the in-flow of engine cylinder.

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“…A suitable turbulence level of the charge is obtained by the initial swirl and squish. The initial swirl in the cylinder is made by the intake system (Paul and Ganesan, 2010). The flow of charge in the radius direction inward the chamber is forced by squeezing the surface of the piston.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the flow field in the combustion chamber of the internal combustion test engine

Tutak¹,

Jamrozik²

2011

Chemical and Process Engineering

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Results of a research study into the velocity field in combustion chamber of internal combustion engine are presented in the paper. Measurements of fresh charge flow velocity in the cylinder axis and near the cylinder squeezing surface were performed. The hot-wire anemometer was used. The measurement results were used for analysis of turbulence field in the examined combustion chamber. It turned out that in the axis of cylinder the maximum of velocity occurs 30 deg before TDC and achieves 6 m/s. In the studied combustion chamber, the maximum value of turbulence intensity was close to 0.2 and it was achieved 35 deg BTDC. Additionally, the maximal velocity dispersion in the following cycles of the researched engine was at the level of 2 m/s, which is 35% of the maximum value of flow velocity. At a point located near the squeezing surface of the piston, a similar level of turbulence, but a the smaller value of the average velocity was achieved. The turbulence field turned out to be inhomogeneous in the combustion chamber.

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Flow field development in a direct injection diesel engine with different manifolds

Cited by 38 publications

References 13 publications

Numerical Investigation and Fatigue Life Estimation of Conventional and Modified Piston of Diesel Engine

Numerical Investigation and Fatigue Life Estimation of Conventional and Modified Piston of Diesel Engine

CFD Analysis of Swirl Enhancement in a Direct Injection Diesel Engine with Vortex Generator in Inlet Manifold

Characteristics of the flow field in the combustion chamber of the internal combustion test engine

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