Yazar "Altuntaş, Önder" için Makale Koleksiyonu listeleme
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Aircraft fuel system energy and exergy analysis under hot day conditions
Yilanli, Muhammet; Altuntaş, Önder; Acikkalp, Emin; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2018)In this paper, energy and exergy analysis of the fuel system is performed to investigate the variation of flow and heat energies of fuel. Thermal balance, formed by many different components of aircraft systems by means ... -
Assessment of a ramjet engine for different Mach numbers
Ayaz, Süleyman Kagan; Altuntaş, Önder (Inderscience Enterprises LTD, 2017)The aim of this study is to determine optimum working of a generic ramjet engine. A thermodynamic analysis has been performed to evaluate three different ramjet flight conditions that have been obtained by using GasTurb. ... -
Assessment of thermodynamic performance and exergetic sustainability of turboprop engine using mixture of kerosene and methanol
Ekici, Selçuk; Altuntaş, Önder; Acikkalp, Emin; Sögüt, M. Ziya; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2016)In this study, first and second laws of thermodynamics were performed in the turboprop and is analysed and discussed with the mathematical model of sustainability performance of a turboprop engine using a mixture of ... -
Calculation of domestic flight-caused global warming potential from aircraft emissions in Turkish airports
Altuntaş, Önder (Inderscience Enterprises LTD, 2014)In this study, global warming potential (GWP) is calculated for aircrafts used in Turkish airports. The basic idea of this study is to investigate both emissions and their GWP values. This study is conducted in three steps, ... -
Calculation of HC, CO and NOx from civil aviation in Turkey in 2012
Ekici, Selçuk; Yalın, Görkem; Altuntaş, Önder; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2013)To meet the growing demand for air transport, airline companies doubled their aircraft numbers in Turkey, where civil aviation activities have shown great development in recent years. This increase in aircraft numbers ... -
Designation of Environmental Impacts and Damages of Turbojet Engine: A Case Study with GE-J85
Altuntaş, Önder (MDPI, 2014)Between the troposphere and stratosphere layers of the atmosphere is a critical zone for collecting emissions and negative effects on the Earth (ecological, humanity, and resources). Aircrafts are the main causes of the ... -
Düz Uçuş ve Tırmanmada Farklı Motor Tipleri İçin Taşıma Ekserjisi
Ekserji analizi, günümüzde hava trafiğinin artmasıyla birlikte hava araçlarından kaynaklanan küresel ısınma etkilerinin azaltılması ve enerjinin etkin kullanıma yönelik yapılan çalışmalarda büyük önem arz etmektedir. Bu ... -
Environmental impact assessment of a turboprop engine with the aid of exergy
Atılgan, Ramazan; Turan, Önder; Altuntaş, Önder; Aydın, Hakan; Synylo, Kateryna (Pergamon-Elsevier Science LTD, 2013)To develop approaches that effectively reduce engine environmental effect of aircrafts, it is necessary to understand the mechanisms that have enabled improvements in thermodynamic efficiency of aircraft engines. In the ... -
Exergetic, Exergoeconomic and Sustainability Assessments of Piston-Prop Aircraft Engines
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Turkish Soc Thermal Sciences Technology, 2012)In this study, the exergetic, exergoeconomic, and sustainability aspects of piston-prop aircraft engines are comprehensively reviewed. These analysis and assessment tools are applied to a four-cylinder, spark ignition, ... -
Exergoenvironmental analysis of piston-prop aircrafts
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2012)This study deals with exergoenvironmental analysis of a four-cylinder, spark ignition, naturally aspirated and air-cooled piston-prop aircraft engine for landing takeoff (LTO) and cruise phases. This analysis includes the ... -
Investigation of environmental impact caused by aircraft engines
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2013)The environmental effects of exhaust gas emissions from different types of spark ignitions (SIs) - naturally aspirated and air-cooled from piston-prop aircraft engines - at the landing and take-off (LTO) phase of flight-based ... -
Investigation of thermodynamic performance based on the humidity effect in the aircraft environmental control systems
Tuzemen, Seda; Altuntaş, Önder; Söğüt, Mehmet Ziya; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2015)Some environmental parameters, such as pressure, temperature, humidity and velocity, of air are important for passengers, stayed in aircraft cabin. These values change with altitudes, also atmospheric conditions. The ... -
Performance Evaluation of an Experimental Turbojet Engine
Ekici, Selçuk; Şöhret, Yasin; Çoban, Kahraman; Altuntaş, Önder; Karakoç, Tahir Hikmet (Walter De Gruyter GMBH, 2017)An exergy analysis is presented including design parameters and performance assessment, by identifying the losses and efficiency of a gas turbine engine. The aim of this paper is to determine the performance of a small ... -
Sustainability Metrics of a Small Scale Turbojet Engine
Ekici, Selçuk; Şöhret, Yasin; Çoban, Kahraman; Altuntaş, Önder; Karakoç, Tahir Hikmet (Walter De Gruyter GMBH, 2018)Over the last decade, sustainable energy consumption has attracted the attention of scientists and researchers. The current paper presents sustainability indicators of a small scale turbojet engine, operated on micro-aerial ...