Melih Yildiz

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Verified

Melih verified their affiliation via an institutional email.

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• PhD
• Professor (Assistant) at Iğdır Üniversitesi

Vehicle emissions and fuel economy are the primary factors determining the improvement potential of an internal combustion engine and powertrain systems under actual traffic conditions. This study presents the simulated emissions and fuel consumptions of a representing internal combustion engine and parallel hybrid engine vehicle in actual driving...

Phase change material (PCM) cooling is a promising strategy for battery thermal management system due to its high latent heat storage capacity. However, it has drawbacks such as abruptly decreasing heat transfer rate during the transition to a fully liquid phase owing to its low thermal conductivity. One of the suggested methods to overcome the pro...

Partial differential heat conduction equations are typically used to determine temperature distribution within any solid domain. The difficulty and complexity of the solution of the equation depend on differential equation characteristics, boundary conditions, coordinate systems, and the number of dependent variables. In the current study, the nume...

This paper presents a methodology for generating realistic driving cycles through a combination of Markov chain modeling, Monte Carlo simulation, and dynamic time warping. The study is focused on the construction of a representative driving cycle for the city of Iğdır in Turkey, taking into account its unique traffic characteristics. The methodolog...

A battery temperature is one of the significant factors in attaining optimum performance from electrical vehicles. Therefore, determining battery cell temperature during varying operating conditions is essential for a battery thermal management system design. This study investigates the temperature variation of a cylindrical battery cell at differe...

This study presents the numerical analysis of biomass tea waste (BTW) combustion in a vertical furnace under various excess air ratios, using Computational Fluid Dynamics (CFD). The biomass tea waste fuel was injected at the bottom of the furnace. The primary and secondary air inlets in different cross-section areas were also located at the bottom...

This paper presents a methodology for generating realistic driving cycles using Markov chain modelling, Monte Carlo simulation and dynamic time warping. The study focuses on the construction of a representative driving cycle for the city of Igdir, taking into account its unique traffic characteristics. The methodology involves segmenting the origin...

Low temperature combustion concepts in internal combustion engines have arisen as one of the solutions that reduce NOx and particulate emissions without a fuel consumption penalty. Among the combustion concepts, reactivity controlled compression ignition (RCCI) has the potential of being able to be achieved in a wider operating range than other low...

Solar energy is an essential source of renewable energy due to its sustainable huge energy potential. In recent years, critical technological advances have been achieved in solar energy systems, which in turn has reduced investment costs in this field. Thus, there has been a remarkable increase in the installed solar power capacity in the world. La...

Offshore wind turbines offer a benefit in the aspects of the use of much more energy from wind due to lower surface roughness, turbulence, and more steady wind flow. Besides, it has become an alternative to wind power plants to have been built on land because of the decrease in places on the land and obstacles that are confronted in public works. H...

This study numerically investigates the heat transfer and hydraulic performance of Al2O3-water nanofluids flowing through a horizontal smooth pipe exposed to a constant heat flux. The nanofluids were regarded as four different varying concentrations in the range from 0.01 to 0.04 by a 0.01 increment (by volume) of the nano-particle, Al2O3. Numerica...

Spark ignition–controlled auto-ignition is a combustion strategy to overcome the challenges in a homogeneous charge compression ignition or controlled auto-ignition combustion which has a limited operation region and does not have any direct control of the combustion timing. However, the spark ignition–controlled auto-ignition combustion can result...

Combustion modeling plays a key role in an engine simulation to predict in-cylinder pressure development and engine performance with a high level accuracy. Wiebe function, representing mass fraction burned (MFB) as a function of crank angle position, is widely used to predict the combustion process. The work presents a predictive zero-dimensional (...

This study investigates the combustion products of diesel-biodiesel fuel blends by considering its chemical equilibrium state. In order to determine the equilibrium combustion products involving 10 species, a solving scheme which can be used for different fuel blends consisting of CnHm and CαHβOγ generic structures was developed. The constituted so...

The use of hybrid electrical engines can provide more efficiency by reducing fuel consumption and emissions. In the research, the experimental studies on the created hybrid electric engine were presented. The hybrid engine combines an electric motor with the internal combustion engine (ICE) which is operated under spark assisted controlled auto-ign...

Controlled auto ignition (CAI) or, also known homogenous compressed ignition, is an advanced combustion technology allowing a lower NOx emission and fuel consumption that can relieve the energy demand based on petroleum. The objective of this study is to determine the effects of spark ignition (SI), spark assist controlled auto ignition (SI-CAI) an...

This paper presents the numerical analysis of a controlled auto ignition (CAI), four stroke, single cylinder engine, by using methane fuel. The goal of this study was to determine how exhaust gas recirculation (EGR) rate affects combustion, emission and engine performance. The EGR rates were selected as 27 %, 32 %, 37 %, and 42 % by mass with exces...