CFD Investigation of In-Cylinder Air Flow to Optimize Number of Guide Vanes to Improve CI Engine Performance using Higher Viscous Fuel

Saad, Idris; Bari, Saiful

doi:10.15282/ijame.8.2013.1.0089

Cited by 23 publications

(11 citation statements)

References 28 publications

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“…The combustion process is a very fast process and is an oxidizing chemical reaction that chemically combines fuel with oxygen in the atmospheric air which releases huge energy in the form of heat (Radcliff, Roark, & Koloski, 2009;Rahim, Mamat, Taib, & Abdullah, 2012;Saad & Bari, 2013). The ignition event is an engine operation period where the charge ignites and rapidly oxidizes during a chemical reaction to release heat energy.…”

Section: Introductionmentioning

confidence: 99%

Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Abdullah¹,

Shahruddin²,

Mamat³

et al. 2014

J MECH ENG SCI

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This study presents the engine performance, fuel economy and exhaust emissions at variations of air intake pressure. In a carburetor system, the air intake pressure is influenced by the degree of opening throttle plate and the Venturi effect which draws the fuel to the combustion chamber. The experimental work was carried out on variations of engine speed and load using a single cylinder four stroke gasoline engine attached to a dynamometer. The measured exhaust emission compositions are used to determine the mode of combustion. The results show that the standard air intake system resulted in rich combustion which then led to incomplete combustion, which was caused by less availability of air for the combustion process. Eliminating the air filter reduces the air flow restriction in the air intake system resulting in better combustion and less unburned components due to higher air availability. Higher air intake pressure is better at increasing the efficiency of combustion within a limited time to improve fuel economy, power output and exhaust emissions. Better combustion also leads to reduced unburned components such as carbon (C), hydrogen (H 2 ), carbon monoxide (CO) and hydroxide (OH), which results in cleaner emissions.

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Section: Introductionmentioning

confidence: 99%

Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Abdullah¹,

Shahruddin²,

Mamat³

et al. 2014

J MECH ENG SCI

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“…Computational domain of the CFB model associated with rectangular grids is shown in Figure 2. An extra refinement of the mesh, so-called the nested-block, is added to locally increase the meshing resolution [25,26]. Apart from that, three types of sediment species were used in the model; coarse sand, gravel and coarse gravel with diameters of 0.005m, 0.0138m and 0.021m, respectively.…”

Section: Computational Domain and Meshing Generationmentioning

confidence: 99%

Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport

Fitriadhy¹,

Faiz²,

Abdullah³

2017

J. MECH. ENG. SCI.

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Floating breakwater becomes an alternative and reliable coastal area protection as it is cheaper in production cost as compared to conventional bottom-fixed breakwater. Floating breakwater system would be the best decision in order to control sedimentation that threatens the shore due to erosion. This study proposes to analyse Cylindrical Floating Breakwater (CFB) aimed at gaining a sufficient reduction in the sediment transport rate along the shore (case study at Tok Jembal Beach in Kuala Terengganu) by using CFD approach. Several parameters for the effects of wavelengths and vertical clearance between the CFB and seabed on the gradient of suspended and packed sediment were simulated by using Flow3D. A wave boundary was assigned to give an insight on regular waves effects to the parameters used in the simulation. The results showed that the presence of CFB markedly reduced the concentration and mass of suspended sand, gravel and coarse gravel for the whole range of wavelengths considered. Besides, it was found that varying the relative clearance of the floating breakwater and seabed was particularly sensitive to the concentration and mass of suspended sediment. Meanwhile, the bulk of sediment mass and concentration remain insignificant for the investigated wavelength and vertical clearance. From this standpoint, the cylindrical floating breakwater (CFB) could significantly minimise the gradient of sediment transport along the breakwater-beach distance while its installation depth may be optimised for circumstances to save cost, avoid breaking waves and morphological changes, ship traffic routes and etc.

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“…Mesh and cell size are critically important that need to be applied appropriately as they can affect both the accuracy of the results and the simulation runtime/memory. Thus, for the present wave-structure problem, the multi-block gridding was properly considered in the simulations in such a way that the nested blocks were embedded within containing block to locally increase the meshing resolution [21,22]. By this technique, the cell count can be greatly reduced while maintaining resolution in order to capture the important features of the geometry as well as sufficient flow details.…”

Section: Computation Domain and Meshing Generationmentioning

confidence: 99%

Hydrodynamic performance of cylindrical floating breakwater in waves

Abdullah¹,

Fitriadhy²,

Hairil³

et al. 2017

Int. J. Automot. Mech. Eng.

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Attenuating waves by simple prismatic structures are increasingly recognised for coastal protection. Yet, evaluating their performance as good attenuators inevitably requires a reliable approach to adequately capture the dynamic interaction between waves and structure. This paper presents a prediction on hydrodynamic properties of pile-restrained cylindrical floating breakwater using computational fluid dynamics (CFD) approach. Several parameters for the effects of relative width (/) and relative draft (/) of the floating breakwater on the coefficient of transmission, reflection, and energy dissipation have been simulated using Flow3D. A wave boundary is assigned to give an insight into the regular and random wave effects to the parameters used in the simulation. The result revealed that the wave absorbing effect of CFB is apparently good, especially in high regular waves that considerably suppress the wave transmission. The higher energy dissipation than reflection characteristics suggests that the breakwater behaves effective as wave dissipator, especially for short waves. This attributed to the stiffness effect and in-plane damping across the vertical cage. From the practical views, the installation of the breakwater system into floating bridge or docks with limited rolls is satisfactory for perimeter protection specifically in the coastal zone of peninsular Malaysia.

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CFD Investigation of In-Cylinder Air Flow to Optimize Number of Guide Vanes to Improve CI Engine Performance using Higher Viscous Fuel

Cited by 23 publications

References 28 publications

Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Effects of Air Intake Pressure on the Engine Performance, Fuel Economy and Exhaust Emissions of A Small Gasoline Engine

Computational fluid dynamics analysis of cylindrical floating breakwater towards reduction of sediment transport

Hydrodynamic performance of cylindrical floating breakwater in waves

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