2008 (18) Analysis of Engine Speed Effect on Temperature and Pressure of Engine Based on Experiment and Computational Simulation

Journal of Applied Sciences Research, 4(1): 76-83, 2008
© 2008, INSInet Publication

N.M.I.N. Ibrahim, Semin, Rosli A. Bakar, Abdul R. Ismail and Ismail Ali

Abstract: This paper is want to explore the in-cylinder pressures and temperature for a single cylinder
two-stroke spark ignition (SI) engine simulation and validated using cylinder pressure and temperature
experiment data. One dimensional analysis is used GT-POWER 6.2 software for computational simulation.
These values defined with pressure average and used on simulation analysis. Also include the prediction
of effects on the in cylinder pressure and temperature. The research results were validating between
measured and calculated shown in graphs in this paper.

Key words: Computational simulation, in-cylinder pressure and temperature, simulation

2008 (19). Analysis of Engine Speed Effect on Temperature and Pressure of Engine Based on Experiment and Computational Simulation

Journal of Applied Sciences Research, 4(1): 76-83, 2008
© 2008, INSInet Publication

Analysis of Engine Speed Effect on Temperature and Pressure of Engine Based
on Experiment and Computational Simulation
N.M.I.N. Ibrahim, Semin, Rosli A. Bakar, Abdul R. Ismail and Ismail Ali

Abstract: This paper is want to explore the in-cylinder pressures and temperature for a single cylinder two-stroke spark ignition (SI) engine simulation and validated using cylinder pressure and temperature experiment data. One dimensional analysis is used GT-POWER 6.2 software for computational simulation. These values defined with pressure average and used on simulation analysis. Also include the prediction of effects on the in cylinder pressure and temperature. The research results were validating between measured and calculated shown in graphs in this paper.

Key words: Computational simulation, in-cylinder pressure and temperature, simulation

2008 (20). In-Cylinder Flow through Piston-Port Engines Modeling using Dynamic Mesh

Journal of Applied Sciences Research, 4(1): 58-64, 2008
© 2008, INSInet Publication

In-Cylinder Flow through Piston-Port Engines Modeling using Dynamic Mesh
Semin, N.M.I.N. Ibrahim, Rosli A. Bakar and Abdul R. Ismail

Abstract: This paper presents numerical study of three-dimensional analysis of two-stroke spark-ignition (SI) cross loop-scavenged port. The objective of this study is to investigate the in-cylinder characteristics at motored transient condition. The pressure on in-cylinder and intake port were collected and applied for validation with numerical results for 1400 rpm. The three-dimensional modeling analysis was performed utilizing dynamic mesh method. The prediction of distribution of in-cylinder pressure and mass fraction of gases function of crank angle were discussed. The results shown that the relative error between experimental and numerical less that 2 %.

Keywords: Computational fluid dynamics, in-cylinder flow, modeling, two stroke engines

2008 (21). Steady-State and Transient Simulation of Gas Flow Pressure in Intake Port Engine

Journal of Engineering and Applied Sciences
Year: 2008 | Volume: 3 | Issue: 1 | Page No.: 47-54
DOI: 10.3923/jeasci.2008.47.54
Steady-State and Transient Simulation of Gas Flow Pressure in Intake Port Engine
Semin , Abdul Rahim Ismail and Rosli Abu Bakar
Abstract: This study presents the gas flow pressure in the intake port of four-stroke direct-injection compression ignition engine using GT-Suite software for steady-state and transient simulation. To investigate and simulate the intake port gas flow pressure profile of compression ignition engine is using GT-Power engine model were developed in this study. GT-Power is sub-system menu from GT-Suite. The engine model is developed from the real compression ignition engine data and input to software library. In this research, the simulation of engine model is running in variations engine speeds. The simulation output data is collected from the GT-Post results plots and cases RLT in post processing. The simulation results of the intake port engine model are shown the characters in intake port pressure profile of engine in variations engine speeds. The detail performance intake port gas flow pressure is shown in graphs in this study.

2007 (1). Engine Power Calculation Using Air Flow Through Engine from Flowbench Test Flow of Four Stroke Direct Injection Diesel Engines

Journal of Engineering and Applied Sciences
Year: 2007 | Volume: 2 | Issue: 12 | Page No.: 1812-1817
DOI: 10.3923/jeasci.2007.1812.1817
Engine Power Calculation Using Air Flow Through Engine from Flowbench Test Flow of Four Stroke Direct Injection Diesel Engines
Semin , R.A. Bakar and A.R. Ismail
Abstract: The objective of this study, is to present the experimental results for diesel engine power calculation based on air flow through engine from test flow of engine cylinder head using Superflow Flowbench SF-1020. In the SuperFlow Flowbench for four-cycle engine testing, air is drawn in through the cylinder head into the machine, through the air pump and exits through the vents at each side of the flow bench. A flow test in SuperFlow Flowbench consists of blowing or sucking air through a cylinder head or other component at a constant test pressure then the flow rate is measured at various valve lift. In this experiment, test pressure is setting at 1651, 1397, 1143, 889 and 635 of mm H2O, then the valve lifts in setting at 0.05, 0.1, 0.15, 0.2 and 0.25 of L/D ratio in every test pressures. The experiment and the calculations results are shown in table and figure in this study. The result shown that increasing of the valve lift and test pressure are positive correlation to increase the air flow through engine, engine power and engine speed.

2007 (2). Valve Flow Discharge Coefficient Investigation for Intake and Exhaust Port of Four Stroke Diesel Engines

Journal of Engineering and Applied Sciences
Year: 2007 | Volume: 2 | Issue: 12 | Page No.: 1807-1811
DOI: 10.3923/jeasci.2007.1807.1811
Valve Flow Discharge Coefficient Investigation for Intake and Exhaust Port of Four Stroke Diesel Engines
Abdul Rahim Ismail , Semin and Rosli Abu Bakar
Abstract: The study presents the effect of the coefficient of discharge of intake and exhaust valve for direct injection diesel engine. The main purpose of the present research is to determine the discharge coefficient of intake and exhaust valves in the engine cylinder head of a 406 cm3. The experiment has been conducted using a flow bench model Superflow SF-1020. It is required to know such discharge coefficients, as a function of lift and pressure ratio in the mathematical modelling process at each juncture during the open cycle. The obtained results are dependent on test pressure.

2007 (3). In-Cylinder Mass Flow Rate and Gas Species Concentration Simulation of Spark Ignition Engine

Journal of Engineering and Applied Sciences
Year: 2007 | Volume: 2 | Issue: 12 | Page No.: 1795-1806
DOI: 10.3923/jeasci.2007.1795.1806
In-Cylinder Mass Flow Rate and Gas Species Concentration Simulation of Spark Ignition Engine
N.M.I.N. Ibrahim , Semin , Rosli Abu Bakar , Abdul Rahim Ismail and Ismail Ali
Abstract: The objective of this research, is to simulate the in-cylinder mass flow rate for a single cylinder two-stroke spark ignition internal combustion engine. The research describes the Computational Fluid Dynamic (CFD) analysis technique to predict in-cylinder flow on scavenging process. The modeling of three-dimensional solid of scavenging model was developed using Solidwork computer aided design software. The three-dimensional model is imported to the GAMBIT to generate meshes grids and imported to FLUENT software for modeling analysis. This analysis is using the dynamic mesh approaches using unstructured tetrahedral and layered hexahedral elements simulated from Top Dead Center (TDC) at 0 of crank angle. Parameter of pressure is used as boundary condition collected from the experimental results at the intake port. The engine modeling simulates on motored condition for un-firing cases at difference of engine speed. The results shown that, using the dynamic mesh approaches give confident results compared with experimental. The results have been predicted of mass flow rate and mass fraction of burned gases on engine cylinder. Contour plotted of mass fraction burned gases and vector of velocity was plotted.

2007 (4). Nozzle Holes Effect on Unburned Fuel in Injected and In-Cylinder Fuel of Four Stroke Direct Injection Diesel Engine

Research Journal of Applied Sciences
Year: 2007 | Volume: 2 | Issue: 11 | Page No.: 1165-1169
DOI: 10.3923/rjasci.2007.1165.1169
Nozzle Holes Effect on Unburned Fuel in Injected and In-Cylinder Fuel of Four Stroke Direct Injection Diesel Engine
Semin and Rosli Abu Bakar
Abstract: The fuel nozzle is an important aspect for diesel engine combustion performance. The model of four-stroke direct-injection diesel engines is developed in the research to investigate the injected and in-cylinder fuel diesel engine in unburned fuel effect from the fuel nozzle multi holes geometries. Model and simulation in this research is using GT-POWER from the GTise-6.2 software were specially development for internal combustion engines performance simulation. The selected diesel engine is opened, breakdown and measurement of all its components size to input to the window engines component menu of the model. The investigation results output of the simulation is focuses on nozzle holes effect in unburned fuel in injected and in-cylinder fuel process of diesel engine. The holes nozzles from 1 hole until 10 holes in difference orifice diameter have been examined using GT-POWER model simulation and the results shown that the 5 holes nozzle provided the best burning fuel results in any variation engine speeds.

2007 (5). Air Flow Analysis of Four Stroke Direct Injection Diesel Engines Based on Air Pressure Input and L/D Ratio

Research Journal of Applied Sciences
Year: 2007 | Volume: 2 | Issue: 11 | Page No.: 1135-1142
DOI: 10.3923/rjasci.2007.1135.1142
Air Flow Analysis of Four Stroke Direct Injection Diesel Engines Based on Air Pressure Input and L/D Ratio
Semin , Rosli Abu Bakar and Abdul Rahim Ismail

Abstract: The air flow through engines is equally important to have accurate values for coefficients of discharge through the combination of valves, ports and ducts of engines. In this air flow analysis is investigated of air flow is desirable for intake flow through the exhaust flow port using SuperFlow Flowbench. The air flow of the diesel engines can be quite measured under steady flow conditions for a range of pressures and valve Lift per Diameter (L/D). This study presents experimental results for air flow investigating in the intake and exhaust flow port of four stroke direct injection diesel engines. The airflow measurements and calculation are shown for various pressures, valve Lift per Diameters (L/D) ratio conditions at the intake port pipe to cylinder and cylinder to exhaust port pipe geometries. The result shown that, the increasing pressure input in port flow on fixed valve L/D can increase the air flow through engine cylinder.