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Browsing Makine Mühendisliği / Mechanical Engineering by Author

Browsing Makine Mühendisliği / Mechanical Engineering by Author "Soyhan, Hakan Serhad"

Now showing items 1-20 of 31

AN EXPERIMENTAL AND MODELING STUDY TO INVESTIGATE EFFECTS OF TWO-STAGE DIRECT INJECTION VARIATIONS ON HCCI COMBUSTION

Ali Turkcan; Ahmet Necati Ozsezen; Mustafa Canakci; Coşkun, Gökhan; Soyhan, Hakan Serhad; Usame Demir (TAYLOR & FRANCIS INC, 2015)

In this study, homogenous charge compression ignition (HCCI) combustion with two-stage direct injection (TSDI) strategies was modeled with stochastic reactor model (SRM) and validated by using the experimental results of ...
An intake manifold geometry for enhancement of pressure drop in a diesel engine

Kenan Gocmen; Soyhan, Hakan Serhad (ELSEVIER SCI LTD, 2020)

Intake manifolds are one of the most important components affecting performance in internal combustion engines. An intake manifold having low pressure drop is very important to maximize the mass of the drawn air into the ...
Analysis of a priority flow control valve with hydraulic system simulation model

Coşkun, Gökhan; Turgay Kolcuoglu; Taner Dogramaci; Anil Can Turkmen; Cenk Celik; Soyhan, Hakan Serhad (SPRINGER HEIDELBERG, 2017)

Mobile direction control valves are hydraulic system components which transfer the hydraulic oil to the accelerator to control the system. These components are mostly used in tractors, forklifts, and backhoe loaders. Forward ...
Analysis of in-cylinder H2O2 and HO2 distributions in an HCCI engine - Comparison of laser-diagnostic results with CFD and SRM simulations

Coşkun, Gökhan; Malin Jonsson; Joakim Bood; Martin Tuner; Martin Algotsson; Bo Li; Zhongshan Li; Soyhan, Hakan Serhad; Marcus Alden; Bengt Johansson (ELSEVIER SCIENCE INC, 2015)

By applying a novel approach to evaluate photofragmentation laser-induced fluorescence (PFLIF) imaging, experimental quantitative information on the temporal in-cylinder distribution of hydrogen peroxide (H2O2) in a ...
Biodiesel Addition to Standard Diesel Fuels and Marine Fuels Used in a Diesel Engine: Effects on Emission Characteristics and First- and Second-Law Efficiencies

Soyhan, Hakan Serhad (AMER CHEMICAL SOC, 2009)

This paper presents comparative energy and exergy analyses of a No. 2 diesel fuel, marine fuel, and four various biodiesel fuels for a four-cylinder, four-stroke, direct-injection diesel engine. The engine was used to ...
Chemical Kinetic Modelling of Combustion in Internal Combustion Engines Using Reduced Chemistry

Soyhan, Hakan Serhad (2002)
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 ...
Computational investigation of combustion and emission characteristics of toluene reference fuel (TRF) mixtures in an HCCI engine using stochastic reactor model

Coşkun, Gökhan; Usame Demir; Yılmaz, Neslihan; Soyhan, Hakan Serhad (SPRINGER HEIDELBERG, 2017)

In this study, a homogeneous charge compression ignition (HCCI) engine was fueled with primary reference fuel (PRF) and toluene mixture using a zero-dimensional simulation code called stochastic reactor model (SRM) for ...
Critical evaluation of CFD codes for interfacial simulation of bubble-train flow in a narrow channel

Soyhan, Hakan Serhad (JOHN WILEY & SONS LTD, 2007)

Computational fluid dynamics (CFD) codes that are able to describe in detail the dynamic evolution of the deformable interface in gas-liquid or liquid-liquid flows may be a valuable tool to explore the potential of multi-fluid ...
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 ...
editorial

Soyhan, Hakan Serhad (2012)
Editorial for special issue FCE/ICS 2012

Soyhan, Hakan Serhad (ELSEVIER SCI LTD, 2014)
Effects of Rapeseed oil addition to a diesel fuel on thermodynamic efficiencies

Soyhan, Hakan Serhad (2014)
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 ...
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 ...
Hexadecane mechanisms: Comparison of hand-generated and automatically generated with pathways

Soyhan, Hakan Serhad (ELSEVIER SCI LTD, 2014)

In this paper, the automatically generated mechanism for hexadecane with both high and low temperature chemistry included is compared to a systematically generated mechanism by hand. In contrast to other systems for automatic ...
Influences of second injection variations on combustion and emissions of an HCCI-DI engine: Experiments and CFD modelling

Coşkun, Gökhan; Soyhan, Hakan Serhad; Demir, Üsame (2014)
Microwave-assisted pilot-scale biodiesel production and engine tests

Veli Gokhan Demir; Hayrettin Yuksel; Hasan Koten; M. Zafer Gul; Soyhan, Hakan Serhad (ICE PUBLISHING, 2019)

A pilot-scale microwave-assisted biodiesel reactor (60 I) was designed, manufactured and utilised to produce biodiesel from sunflower, canola and soybean oils. In addition, the engine performance and exhaust emissions of ...
Modeling of an HCCI engine by using CFD and detailed chemical kinetic model

Soyhan, Hakan Serhad; Büyükkaya, Ekrem; Halıcı, Fethi (SILA SCIENCE, 2012)

In this study, a combustion analysis has been performed in a cylinder of a four stroke engine's mixture by using Fluent and Chemkin commercial codes for CFD analysis. The analysis includes two strokes and provides all the ...
Modeling the diffusion-free liquid phase residence time distribution of Taylor flow by the unit cell concept: Progress and limitations

Erdoğan, Selvet; Soyhan, Hakan Serhad (ELSEVIER SCIENCE SA, 2012)

In this paper we study the diffusion-free liquid phase residence time distribution (RID) of laminar Taylor flow in square mini-channels numerically and analytically. We evaluate the RTD caused by the non-uniform laminar ...