Numerical Analysis of Flow Structure inside a Single Cylinder of a 4 Valve Head under Steady-State Condition

Binjuwair, Saud; Ibrahim, Salah S.

doi:10.4271/2013-24-0186

Cited by 6 publications

(6 citation statements)

References 13 publications

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“…Three planes were created inside the mesh: a vertical plane which cut the cylinder into a radial plane, across the right valve to visualize tumbles, and two others horizontal in L=88 mm and 110 mm from the head cylinder plane, to visualize swirls. In case of increasing the valve lift, the flow structures remain similar as in Binjuwair's [1] study, but it can be added that the main tumble is created partly thanks to the head of the valve, and it grows up following the increase of the lift value and so the velocity. It moves far away from the cylinder wall, towards the cylinder axis and under the valve.…”

Section: Discussionmentioning

confidence: 60%

“…From 21 million of tetra-elements, it was obtained only 4 million after transformation, including two layers of prismatic cells to take into account wall shear stresses. Binjuwair [1] carried out his study with 1.7 million of elements.…”

Section: B Meshmentioning

confidence: 99%

“…For the second stage, which is an intermediate lift level according to [1], 6 mm and 8 mm were explored.…”

Section: ) Effect Of Valve Lift Increasingmentioning

confidence: 99%

“…Numerical simulations of air behaviour in engine domain need an accurate prediction of the turbulent flow and also excellently reproducing of head cylinder's internal geometry. It has been noticed that most works of CFD in that area are based on Catia® perfect model which does not reproduce exactly the internal shapes, contrary to scanning way for instance [1]. Cases of scanning applications in automotive domain seems to be rather old in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Characterization method of engine air behaviour from a real head cylinder

Zussy¹

2017

Seventh International Conference on Advances in Mechanical, Aeronautical and Production Techniques - MAPT 2017

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This study is based on a head-cylinder provided by a French car manufacturer, which comes from a 4-cylinder 4-stroke spark-ignition engine. This head-cylinder adopts a Double-OverHead -Camshaft (DOHC) with 16 valves, also two per cylinder. The purpose of this paper is to propose a characterization method of the air behaviour inside both the intake conduct of a head-cylinder and the cylinder. The cylinder stroke is known (from the cylinder capacity of the engine) as well as the valve dimensions (by measurements) but none internal dimensions of the conduct. The proposal method follows three main steps: firstly, internal features are extracted separately by moulding with a silicon-calcium mixture, to realize the geometrical limits of the air. This step concerns only the conduct and the combustion chamber of the head-cylinder. Secondly, the two features and one of the two valves are digitized with a Faro® laser arm to compose cloud points of their shapes. Surfaces can be then reconstituted to construct a CAD model, with liftparameterized valves. Thirdly, the CAD model is exported to the CFD software Fluent® to be meshed and used to simulate air behaviour based on turbulence Reynold Stress Model (RSM) and Realizable к-ε models. This last step is realized under steady-state condition, with both 2450 Pa and 9000 Pa of pressure drops between cylinder outlet and intake inlet, to obtain a view of the air motions variations in the conduct and the cylinder following the valves lift. Variations in mass flow rate results are also observed and compared with the literature for 2450 Pa of pressure drop, and allows to choose the best turbulence model. Those concerning 9000 Pa of pressure drop have been already validated with a flow bench test, in a previous study.

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Section: Discussionmentioning

confidence: 60%

Section: B Meshmentioning

confidence: 99%

“…For the second stage, which is an intermediate lift level according to [1], 6 mm and 8 mm were explored.…”

Section: ) Effect Of Valve Lift Increasingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization method of engine air behaviour from a real head cylinder

Zussy¹

2017

Seventh International Conference on Advances in Mechanical, Aeronautical and Production Techniques - MAPT 2017

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“…Fig. 1 (a): Optical access with 80 mm quartz liner [Richter et al, 1999]; (b): Single cylinder optical research engine; (c): Single cylinder optical research engine (SCORE)[Binjuwair, 2013] …”

mentioning

confidence: 99%

Evolution, Trends and Applications of Endoscopy in Internal Combustion Engines

Ágarwal¹,

Singh²,

Agarwal³

2016

JEES

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Due to increasing number of alternative fuels and strict emission norms globally, extensive experimental investigations are being conducted for understanding and improving fuel sprays and combustion of internal combustion (IC) engines. Main objective of this study is to assess the effect of advanced fuel injection equipment (FIE) and in-cylinder processes to improve efficiency and reduce pollutant emissions, in addition to improved understanding of combustion and pollutant formation mechanisms. In order to gain understanding of actual combustion processes and spray characteristics in production grade engines, researchers have developed various optical diagnostic techniques. Endoscopic optical visualization technique is a very effective and relatively cheaper but very challenging technique with great potential amongst them. This paper presents a summary of evolution of endoscopic optical visualization technique for analyzing spray and combustion characteristics in IC engines, current trends in engine endoscopy and some application case studies. This endoscopic technique has great scope in research and development activities for automotive industry.

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Experimental study and numerical simulation on in-cylinder flow of small motorcycle engine

Wahono

Setiawan

2019

Applied Energy

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Numerical Analysis of Flow Structure inside a Single Cylinder of a 4 Valve Head under Steady-State Condition

Cited by 6 publications

References 13 publications

Characterization method of engine air behaviour from a real head cylinder

Characterization method of engine air behaviour from a real head cylinder

Evolution, Trends and Applications of Endoscopy in Internal Combustion Engines

Experimental study and numerical simulation on in-cylinder flow of small motorcycle engine

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