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Browsing by Author "Yaşar, Halit"

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Application of artificial neural network to predict specific fuel consumption and exhaust temperature for a Diesel engine

Parlak, Adnan; İslamoğlu, Yaşar; Yaşar, Halit; Eğrisöğüt Tiryaki, Aysun (PERGAMON-ELSEVIER SCIENCE LTD, 2006)

The ability of an artificial neural network model, using a back propagation learning algorithm, to predict specific fuel consumption and exhaust temperature of a Diesel engine for various injection timings is studied. The ...
Comparison of the Variables Affecting the Yield of Tobacco Seed Oil Methyl Ester for KOH and NaOH Catalysts

Parlak, Adnan; Karabaş, Hülya; Ayhan, Vezir; Yaşar, Halit; Soyhan, Hakan Serhad; Özsert, İbrahim (AMER CHEMICAL SOC, 2009)

Reaction temperature, alcohol/oil molar ratio, type and amount of catalyst, reaction duration, and the water content in free fatty acid are the most important parameters in biodiesel production by the transesterification ...
Comparison of the Variables Affecting the Yield of Tobacco Seed Oil Methyl Ester for KOH and NaOH Catalysts

Parlak, Adnan; Karabaş, Hülya; Ayhan, Vezir; Yaşar, Halit; Soyhan, Hakan Serhad; Özsert, İbrahim (AMER CHEMICAL SOC, 2009)

Reaction temperature, alcohol/oil molar ratio, type and amount of catalyst, reaction duration, and the water content in free fatty acid are the most important parameters in biodiesel production by the transesterification ...
Double-Wiebe function: An approach for single-zone HCCI engine modeling

Yaşar, Halit; Soyhan, Hakan Serhad (PERGAMON-ELSEVIER SCIENCE LTD, 2008)

Single-zone Wiebe-function HCCI combustion models tend to over-predict the peak cylinder pressure. The over-prediction arises because it is not possible for the standard Wiebe function to fully match both the slower ...
Evaluation of heat transfer correlations for HCCI engine modeling

Soyhan, Hakan Serhad; Yaşar, Halit (PERGAMON-ELSEVIER SCIENCE LTD, 2009)

Combustion in HCCI engines is a controlled auto-ignition of well-mixed fuel, air and residual gas. The thermal conditions of the combustion chamber are governed by chemical kinetics strongly Coupled with heat transfer from ...
Experimental and Stochastic Reactor Modeling Results of an HCCI Engine Fueled with Primary Reference Fuel

Yaşar, Halit; Usta, Emel; Demir, Ümmühan (AMER CHEMICAL SOC, 2018)

In recent years, much research has been performed in order to decrease fuel consumption, noise, and exhaust emission levels in internal combustion engines. In this study, the effects of excess air coefficient on performance ...
First and second law analysis of a gasoline engine for various compression ratios

Parlak, Adnan; Yaşar, Halit; Soyhan, Hakan Serhad (INDERSCIENCE ENTERPRISES LTD, 2009)

This article presents a comparative energy and exergy analyses of a single cylinder, four-stroke spark-ignition engine for three compression ratios. A Petter engine with variable compression ratio and ignition timing was ...
First and second law analysis of low heat rejection diesel engine

Yaşar, Halit (ELSEVIER SCI LTD, 2008)

In this study, a comparative first and second law analysis of a turbocharged diesel engine was performed. The main aim was to investigate the impact of thermal insulation on energy, and exergy balances of the engine. For ...
Optimization of an irreversible diesel cycle: Experimental results of a ceramic coated indirect-injection supercharged diesel engine

Parlak, Adnan; Yaşar, Halit; Soyhan, Hakan Serhad (AMER CHEMICAL SOC, 2008)

In this work, an irreversible dual cycle analysis has been performed for enhancing the characteristics of a low heat rejection (LHR) supercharged single-cylinder indirect-injection (IDI) diesel engine. A relation which ...
Performance and exhaust emission characteristics of a lower compression ratio LHR Diesel engine

Parlak, Adnan; Yaşar, Halit (PERGAMON-ELSEVIER SCIENCE LTD, 2003)

In this study, the effects of reducing the compression ratio on the performance and exhaust emissions in a low heat rejection (LHR) indirect injection Diesel engine have been experimentally compared to those obtained from ...
Performance optimisation of an irreversible dual cycle with respect to pressure ratio and temperature ratio-experimental results of a ceramic coated IDI Diesel engine

Parlak, Adnan; Yaşar, Halit (PERGAMON-ELSEVIER SCIENCE LTD, 2004)

An irreversible dual cycle analysis has been performed. Optimisation of the cycle has been performed for power and thermal efficiency with respect to pressure ratio and temperature ratio. Optimum values of pressure ratio ...
The effect of thermal barrier coating on a turbo-charged Diesel engine performance and exergy potential of the exhaust gas

Parlak, Adnan; Yaşar, Halit; Eldoğan, Osman (PERGAMON-ELSEVIER SCIENCE LTD, 2005)

In this study, the effect of insulated combustion chamber surfaces on the turbocharged, direct injection Diesel engine performance was experimentally investigated. Satisfactory performance was obtained with the low heat ...
The effects of injection timing on NOx emissions of a low heat rejection indirect diesel injection engine

Parlak, Adnan; Yaşar, Halit; Haşimoğlu, Can; Kolip, Ahmet (PERGAMON-ELSEVIER SCIENCE LTD, 2005)

Higher NO, is one of the major problems to be overcomed in a low heat rejection (LHR) diesel engine as insulation leads to an increase in combustion temperature about 200-250 degrees C compared to an identical standard ...
Thermal analysis of a partially ceramic coated piston: Effect on cold start HC emission in a spark ignition engine

Cerit, Muhammet; Ayhan, Vezir; Parlak, Adnan; Yaşar, Halit (PERGAMON-ELSEVIER SCIENCE LTD, 2011)

Effect of partially thermal barrier coating on piston temperature distribution and cold start HC emissions of a spark ignition (SI) engine are investigated numerically and experimentally. A Thermal analysis was performed ...