Makale Koleksiyonu
https://hdl.handle.net/11421/18327
2024-03-28T10:46:20ZOrta Menzilli Bir Uçak İçin Yakıt Modelinin Oluşturulması
https://hdl.handle.net/11421/18595
Orta Menzilli Bir Uçak İçin Yakıt Modelinin Oluşturulması
Şahin, Özlem; Aghayeva, Charkaz
Bu çalışmada; orta menzilli bir uçağın (Airbus 320) uçuş rotası tırmanma, düz uçuş ve alçalma olarak üç safhaya ayrılarak uçağın dinamik yörünge profili oluşturulmuştur. Her bir uçuş safhası için BADA (Base of Aircraft Database) verileri kullanılarak matematiksel yakıt modeli geliştirilmiştir. Aynı orta menzilli uçağın, iki farklı tarifeli uçuş rotasına ait uçuş bilgileri analiz edilmiştir. Bu kapsamda planlanan uçuş mesafesi ve gerçek uçuş mesafesi arasındaki fark hesaplanmış ve bu farkın maksimum (fmax), minimum (fmin) ve ortalama (fort) değerlerine karşılık gelen rotalar için yakıt tüketim hesabı tüm uçuş safhaları için hesaplanarak elde edilen yakıt tüketimi, farklı rotalardaki aynı tip uçak için karşılaştırılmıştır.; In this study, the flight path for a medium-range aircraft (A320) is analyzed in three phases as climb, cruise, descent and a dynamic trajectory flight is performed. A mathematical fuel consumption model based on Base of Aircraft Database (BADA) for each flight phase is developed. Flight path data belong to two different scheduled flight operations are examined. The deviation of actual flight distance from scheduled ones are calculated, then the fuel consumption models are improved for routes corresponding to maximum (fmax), minimum (fmin) and average (fort) value of deviations. The fuel consumption is calculated for these specific routes. Finally, the fuel consumption is compared for medium range aircraft flying different routes.
2017-01-01T00:00:00ZEn-Route Airspace Capacity and Traffic Flow Enhancement Using Genetic Algorithms
https://hdl.handle.net/11421/18592
En-Route Airspace Capacity and Traffic Flow Enhancement Using Genetic Algorithms
Çeçen, Kürşat Ramazan; Çetek, Cem
Air transportation industry has gone under a rapid and continuous growth for the last four decades. International Civil Aviation Organization (ICAO) and aircraft manufacturers anticipate that annual growth rate of air traffic will be 4.5-5.1% until 2030. Airspace capacity management becomes more critical for the safety, efficiency and sustainable growth of the industry. Enroute areas cover the largest portion of the controlled airspace and are subdivided into small segments referred to as 'en-route sectors'. Each sector is usually monitored and controlled by a single air traffic controller in the relevant Area Control Center (ACC). When air traffic demand reaches or exceeds the available en-route sector capacity, serious aircraft delays occur at airports or in airspace. When air traffic demand reaches to the available en-route sector capacity, serious aircraft delays occur at airports or in airspace. These delays lead not only to system-wide congestions but also interruptions in air traffic services, airline flight schedules and airport operations. Therefore, these interruptions result in increased operational costs, passenger dissatisfaction and air traffic controller workload. This study presents a multiple entry point assignment model based on a genetic algorithm to minimize delays and increase throughput of a generic high-altitude en-route sector. The proposed approach intends to provide a framework for a decision support system based on flexible and dynamic direct route utilization for air traffic and capacity management. The available single entry point sector configuration and its multiple entry point assignment alternatives were compared for various traffic scenarios. Multiple entry point configurations provided up to 10% increase in throughput and significant reductions in average delay per aircraft compared to the single point entry configuration.; Air transportation industry has gone under a rapid and continuous growth for the last four decades. International Civil Aviation Organization (ICAO) and aircraft manufacturers anticipate that annual growth rate of air traffic will be 4.5-5.1% until 2030. Airspace capacity management becomes more critical for the safety, efficiency and sustainable growth of the industry. Enroute areas cover the largest portion of the controlled airspace and are subdivided into small segments referred to as 'en-route sectors'. Each sector is usually monitored and controlled by a single air traffic controller in the relevant Area Control Center (ACC). When air traffic demand reaches or exceeds the available en-route sector capacity, serious aircraft delays occur at airports or in airspace. When air traffic demand reaches to the available en-route sector capacity, serious aircraft delays occur at airports or in airspace. These delays lead not only to system-wide congestions but also interruptions in air traffic services, airline flight schedules and airport operations. Therefore, these interruptions result in increased operational costs, passenger dissatisfaction and air traffic controller workload. This study presents a multiple entry point assignment model based on a genetic algorithm to minimize delays and increase throughput of a generic high-altitude en-route sector. The proposed approach intends to provide a framework for a decision support system based on flexible and dynamic direct route utilization for air traffic and capacity management. The available single entry point sector configuration and its multiple entry point assignment alternatives were compared for various traffic scenarios. Multiple entry point configurations provided up to 10% increase in throughput and significant reductions in average delay per aircraft compared to the single point entry configuration.
2017-01-01T00:00:00ZUçuş Gecikmeleri ve Havayolu İşletmelerinin Maliyetleri Üzerindeki Etkileri
https://hdl.handle.net/11421/18594
Uçuş Gecikmeleri ve Havayolu İşletmelerinin Maliyetleri Üzerindeki Etkileri
Uslu, Suat
Havayolu işletmeleri ticari amaçlarla taşımacılık yaparlar. Bu nedenle, maliyetleri üzerinde etkili olan faktörlere karşı duyarlıdırlar. Bu faktörlerin en önemlilerinden biri de uçuş gecikmeleridir. Uçuş gecikmeleri havayolu işletmelerinin maliyetlerini kısa ve uzun dönemde önemli ölçüde artırmaktadır. Bu çalışmada uçuş gecikmeleri ve bunların havayolu işletmelerinin kısa ve uzun dönemli maliyetleri üzerindeki etkileri incelenecektir.; Airlines carry for commercial aims. Therefore, they sore for factors which impact on their costs. One of these important factors is also flight delays. Airline costs are increased by flight delays in short and long term. In this study, flight delays and their impact on airline short and long term costs are examined.
2009-01-01T00:00:00ZEurocontrol Slot Allocation Methodology and New Approach For Calculated Take Off Times (Ctot): Alternative Ctot Versus Ctot
https://hdl.handle.net/11421/18593
Eurocontrol Slot Allocation Methodology and New Approach For Calculated Take Off Times (Ctot): Alternative Ctot Versus Ctot
Çınar, Ertan; Demirel, SÖner
In ICAO (International Civil Aviation Organisation) Europe Region, the ATFCM (Air Traffic Flow and Capacity Management) is managed by EUROCONTROL (European Organisation for the Safety of Air Navigation) for a long time. Planned ATFCM applications on nowadays and future time periods are not well enough to solve the airport congestion in an effective way. In the present case, main purpose of this study is to give alternative solution suggestions for narrow airport capacity and to ease the parking positions by making new departure time offers to the airline operators. In the scope of this study, to create free parking positions in every hour zone, air traffic flows are arranged from the imaginary airports to the target arrival airport in the MS Office Excel programme. According to the results of the study, to the target airport 10 extra flights per day and 3650 extra flights per year may be arranged. Furthermore, it is considered that only type of aircrafts B737-800 and A320 landed and departed to/from the target airport, 1.327.140 extra passengers may be transported annually, as number of A320 is 4 times more than number of B737-800. The possible advantages and disadvantages of this study are discussed in the result section.; In ICAO (International Civil Aviation Organisation) Europe Region, the ATFCM (Air Traffic Flow and Capacity Management) is managed by EUROCONTROL (European Organisation for the Safety of Air Navigation) for a long time. Planned ATFCM applications on nowadays and future time periods are not well enough to solve the airport congestion in an effective way. In the present case, main purpose of this study is to give alternative solution suggestions for narrow airport capacity and to ease the parking positions by making new departure time offers to the airline operators. In the scope of this study, to create free parking positions in every hour zone, air traffic flows are arranged from the imaginary airports to the target arrival airport in the MS Office Excel programme. According to the results of the study, to the target airport 10 extra flights per day and 3650 extra flights per year may be arranged. Furthermore, it is considered that only type of aircrafts B737-800 and A320 landed and departed to/from the target airport, 1.327.140 extra passengers may be transported annually, as number of A320 is 4 times more than number of B737-800. The possible advantages and disadvantages of this study are discussed in the result section.
2017-01-01T00:00:00Z