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Toplam kayıt 99, listelenen: 40-59
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Energetic and exergetic efficiency modeling of a cargo aircraft by a topology improving neuro-evolution algorithm
(Pergamon-Elsevier Science LTD, 2016)An aircraft is a complex system that requires methodologies for an efficient thermodynamic design process. So, it is important to gain a deeper understanding of energy and exergy use throughout an aircraft. The aim of this ... -
Energy and exergy (ENEX) analyses of a MD-80 aircraft
(International Journal of Mechanical Engineering and Robotics Research, 2016)The growth in demand for air transport is a problem for the global and local environment. There are, moreover, fundamental conflicts with sustainable development objectives. Sustainability demands a sustainable supply of ... -
Entropy Generation Calculation of a Turbofan Engine: A Case of CFM56-7B
(Walter De Gruyter GMBH, 2018)Entropy generation and energy efficiency of turbofan engines become greater concern in recent years caused by rises fuel costs and as well as environmental impact of aviation emissions. This study describes calculation of ... -
Environmental impact assessment of a turboprop engine with the aid of exergy
(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 ... -
Estimating Aircraft Fuel Flow for a Three-Degree Flight-Path-Angle Descent
(Amer Inst Aeronaut Astronaut, 2011)The objective of this study is to develop statistically significant models in order to determine the effects of altitude on fuel consumption of commercial aircraft during descent for a specific flight-path angle. In this ... -
Estimation of vertical and horizontal distribution of takeoff and climb NOx emission for commercial aircraft
(Pergamon-Elsevier Science LTD, 2013)An investigation of takeoff and climb NOx emissions is reported for a twin-engine, narrow-body, short-to-medium haul commercial aircraft, B737-800. Ten randomly selected flights are considered for two independent domestic ... -
The evaluation of aircraft operations at airports having different numbers and configurations of runways
(2012)Artan hava trafik talebi, hava ulaştırma sisteminin önemli bir parçası olan havaalanlarında kapasite arttırımı ihtiyacını ortaya çıkarmaktadır. Havaalanı hava tarafı kapasitesini etkileyen birçok faktör bulunmaktadır. Pist ... -
Evolution of Microstructure and Texture in AZ31 Alloy Subjected to Gas Forming
(Springer, 2017)In this study, AZ31 sheets were subjected to gas forming using a stepped geometry die and employing two different temperatures (400A degrees C and 450A degrees C) and exposure times (60 s and 120 s). Microstructural ... -
Exergetic analysis of an aircraft turbofan engine
(John Wiley & Sons LTD, 2007)The main objective of the present study is to perform an exergy analysis of a turbofan kerosene-fired engine with afterburner (AB) at sea level and an altitude of 11000 m. The main components of this engine include a fan, ... -
Exergetic and exergo-economic analysis of a turboprop engine: a case study for CT7-9C
(Inderscience Enterprises LTD, 2012)The turboprop engine has played an important role in short haul commuter and military transport aircraft where high speed is not critical. It may provide the aviation sector with one of the most significant means of achieving ... -
Exergetic sustainability assessment of a HALE UAV using dodecene fuel
(Inderscience Enterprises LTD, 2016)Exergetic sustainability performances of a high altitude long endurance (HALE) unmanned aerial vehicle (UAV), having a single turbofan engine and using dodecene as its fuel were investigated all along its flight profile, ... -
Exergetic, Exergoeconomic and Sustainability Assessments of Piston-Prop Aircraft Engines
(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, ... -
Exergo-sustainability indicators of a turboprop aircraft for the phases of a flight
(Pergamon-Elsevier Science LTD, 2013)One of the key challenges for sustainable aviation is to reduce global and local environmental impacts. The scope of this study is analysed and discussed in detail for better understanding of sustainability performances ... -
Exergoeconomic analysis of an aircraft turbofan engine
(Inderscience Enterprises LTD, 2009)This study deals with an exergoeconomic analysis of an aircraft turbofan engine utilising the kerosene as fuel. A new parameter is developed to define the trust cost rate. The cost of exergy destruction, the relative cost ... -
Exergoenvironmental analysis of piston-prop aircrafts
(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 ... -
Exergy analysis of a cogeneration system through Artificial Neural Network (ANN) method
(Inderscience Enterprises LTD, 2010)The main objective of this study is to apply the Artificial Neural Network (ANN) method to a cogeneration system, located in Izmir, Turkey, for exergetic evaluation purposes. The data used are based on the actual operational ... -
Exergy analysis of a turbofan aircraft engine
(Inderscience Enterprises LTD, 2009)An exergy analysis is reported for a General Electric turbofan engine (the CF6-80) using sea-level data. The effects on exergy efficiencies and exergy destructions are investigated of modifying the isentropic efficiencies ... -
Exergy analysis of an air-blasted combustor: an application for atmospheric test rig condition
(Inderscience Enterprises LTD, 2016)Combustion of fuel finds its importance in heating, power production and transportation. The main objective of this study is to assess the performance of an air-blasted combustor using the exergy at different combustor ... -
Exergy indicators of a low-emission aero-engine combustor
(Emerald Group Publishing LTD, 2018)Purpose It is essential to develop more environment-friendly energy systems to prevent climate change and minimize environmental impact. Within this scope, many studies are performed on performance and environmental ... -
An exergy way to quantify sustainability metrics for a high bypass turbofan engine
(Pergamon-Elsevier Science LTD, 2015)As fuel efficiency becomes a greater concern in aero engine design and operation. To meet this need, a new methodology is being developed here that proposes the use of exergetic metrics for mapping the exergy flows throughout ...