Yazar "Usanmaz, Öznur" için listeleme
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Airside Capacity Analysis and Evaluation of İstanbul Atatürk Airport Using Fast-Time Simulations
Özdemir, Mustafa; Çetek, Cem; Usanmaz, Öznur (2018)The demand for air transportation increases rapidly each year and introduces serious problems such as system-wide delays and congestions in air traffic operations. Airports, one of the most critical points of the air ... -
Analysis of Test-Cell Emission Measurements of Newly Overhauled Turbofan Engines
Turgut, Enis Turhan; Cavcar, Mustafa; Yay, Ozan Devrim; Ucarsu, Mehmet; Yılmaz, Elif; Usanmaz, Öznur; Miake-Lye, Richard C. (Amer Inst Aeronautics Astronautics, 2015)In this study, the gaseous emissions of newly overhauled CFM56-3B1 and -3B2 series turbofan engines are measured in a test-cell environment during typical functional and performance test procedures. The measured emissions ... -
An Analysis of Vertical Profiles of Wind and Humidity Based on Long-Term Radiosonde Data in Turkey
Turgut, Enis Turhan; Usanmaz, Öznur (2016)The prediction of atmospheric variables is fundamentally important for flight, and efficiency with environmental impact analyses of aircraft. However, certain variables are less predictable leading to inefficient utilization ... -
Arrival traffic sequence for converging runways
Şahin, Özlem; Usanmaz, Öznur (Springer International Publishing, 2016)Vectoring, automated methods and speed control are available sequencing methods defined by International Civil Aviation Organization (ICAO). Point Merge System (PMS) is an innovative method for merging and sequencing arrival ... -
An assessment of cruise NOx emissions of short-haul commercial flights
Turgut, Enis Turhan; Usanmaz, Öznur (Pergamon-Elsevier Science LTD, 2017)Cruise NOx emissions of aircraft are an important input parameter for studies investigating climate change due to their ability to alter the concentrations of certain trace gases, such as ozone, methane, and hydroxyl in ... -
An assessment of flight efficiency based on the point merge system at metroplex airports
Şahin, Özlem; Usanmaz, Öznur; Turgut, Enis Turhan (Emerald Group Publishing LTD, 2018)Purpose - Metroplex is a system of two or more airports, in physical proximity, with highly interdependent arrival and departure operations. The purpose of this study is the construction of an efficient and effective air ... -
Baro-Vnav yaklaşma prosedürleri ve Eskişehir Anadolu Havaalanı uygulaması
Canarslanlar, Ali Ozan (Anadolu Üniversitesi, 2007)Günümüz havacılığında hassas yaklaşma yörüngeleri yaygın olarak Aletli İniş Sistemlerinin kullanımına göre tasarlanmaktadır. Gerekli altyapıya sahip olmayan ve sadece hassas olmayan yaklaşma yapılabilen meydanların güvenliği ... -
Birbirine yakın paralel pistlerde RNP uçuş prosedürlerinin CBS yöntemine dayalı tasarımı
Şahin, Özlem (Anadolu Üniversitesi, 2006)Hava taşımacılığında talebin sürekli olarak artış göstermesi, hava sahası ve prosedür tasarımının en iyi şekilde yapılması gerekliliğini ortaya koymaktadır. Seyrüsefer sistem doğruluğu, direkt rota, rota muhafaza doğruluğu ... -
Effect of Climb Angle on Aircraft Fuel Consumption and Nitrogen Oxides Emissions
Turgut, Enis Turhan; Usanmaz, Öznur (Amer Inst Aeronautics Astronautics, 2018)Departure climb angles differ with respect to factors such as obstacles within the departure track, meteorological conditions, and cost index input, most of which have a dynamic nature to some extent. In this sense, it is ... -
The effect of flight distance on fuel mileage and CO2 per passenger kilometer
Turgut, Enis Turhan; Usanmaz, Öznur; Cavcar, Mustafa (Taylor & Francis Inc, 2019)In this study, the effect of distance on fuel mileage (fuel burn per nautical mile) and CO2 intensity, based on a large amount of actual flight data, is discussed for narrow-body commercial aircraft performing domestic ... -
Effect of vertical profile inefficiency during descent on fuel burn, emissions and flight time
Aksoy, Hakkı; Usanmaz, Öznur; Turgut, Enis Turhan (Cambridge University Press, 2018)Vertical profile inefficiency caused by low-level flight segments during arrival and departure operations has a great impact on the financial cost of operators as well as negative environmental effects. In this regard, ... -
Emission Benefits of Continuous Descent Approach
Turgut, Enis Turhan; Usanmaz, Öznur; Canarslanlar, Ali Ozan; Şahin, Özlem (World Scientific And Engineering Acad And Soc, 2009)The approach phase often has the most fuel savings potential among the other phases such as takeoff, climbout, cruise and ground operations. Therefore, the main objective of this study is to investigate being close to the ... -
Empirical analysis of the effect of descent flight path angle on primary gaseous emissions of commercial aircraft
Turgut, Enis Turhan; Usanmaz, Öznur; Rosen, Marc A. (Elsevier Sci LTD, 2018)In this study, the effects of descent flight path angle (between 1.25 degrees and 4.25 degrees) on aircraft gaseous emissions (carbon monoxide, total hydrocarbons and nitrogen oxides) are explored using actual flight data ... -
Empirical model assessment of commercial aircraft emissions according to flight phases
The quantities of common emissions are investigated for a specific type of commercial aircraft. Actual flight data and International Civil Aviation Organization emission data are used. All flight phases are considered, ... -
Energy and emission assessments of continuous descent approach
Turgut, Enis Turhan; Usanmaz, Öznur; Canarslanlar, Ali Ozan; Şahin, Özlem (Emerald Group Publishing Limited, 2010)Purpose - Continuous descent approach (CDA) is a method, which allows the aircraft flying its individual optimal vertical profile down to runway threshold with engines operating at low-thrust power. The main objective of ... -
Estimation of vertical and horizontal distribution of takeoff and climb NOx emission for commercial aircraft
Turgut, Enis Turhan; Usanmaz, Öznur; Rosen, Marc A. (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
Şahin, Özlem; Usanmaz, Öznur (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 ... -
Fuel flow analysis for the cruise phase of commercial aircraft on domestic routes
Turgut, Enis Turhan; Cavcar, Mustafa; Usanmaz, Öznur; Canarslanlar, A. Ozan; Döğeroğlu, Tuncay; Armutlu, Kadir; Yay, Ozan Devrim (Elsevier France-Editions Scientifiques Medicales Elsevier, 2014)From the point of view of the environmental impact of aviation, rather than fundamental strategies mainly intended for lower fuel consumption, and thereby less carbon dioxide emissions, more comprehensive approaches have ... -
A gaseous emissions analysis of commercial aircraft engines during test-cell run
Turgut, Enis Turhan; Cavcar, Mustafa; Yay, Ozan Devrim; Ucarsu, Mehmet; Yılmaz, Elif; Usanmaz, Öznur; Döğeroğlu, Tuncay (Pergamon-Elsevier Science LTD, 2015)This study presents an analysis of the seventeen complete measurements of gaseous emissions of eleven different CFM56-7B26 turbofan engines during the regular test-cell runs. A novel measurement setup is established in ... -
Geliş ve kalkış operasyonlarında dikey verimsizliklerin yakıt tüketim ve emisyon etkileri
Aksoy, Hakkı (Anadolu Üniversitesi, 2016)Uçakların geliş ve kalkış operasyonlarında gerçekleştirdikleri düşük irtifa düz uçuş bölümlerinin sebep olduğu dikey uçuş verimsizliği, operatörlerin maliyet giderlerinde ve olumsuz çevresel etkilerin oluşmasında önemli ...
