Forthcoming and Online First Articles

International Journal of Sustainable Aviation

International Journal of Sustainable Aviation (IJSA)

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International Journal of Sustainable Aviation (8 papers in press)

Regular Issues

  •   Free full-text access Open AccessInternational Aviation Smart City Alliance as a global strategy for carbon emissions reduction
    ( Free Full-text Access ) CC-BY-NC-ND
    by Hong Guan, Hao Liu, Raafat George Saadé 
    Abstract: Climate concerns have been on the global agenda for many years now. With the impact of the aviation sector receiving higher visibility, carbon offsetting and reduction in the international civil aviation sector was introduced by the International Civil Aviation Organization. Their proposed scheme was received with mixed reactions. In this study, we identify issues for carbon emissions reduction in the international aviation sector via a critical analysis of the literature. Results show that meeting carbon emission reduction obligations require some form of social innovation whereby existing structures can be leveraged to meet climate goals. We, therefore, introduce the Carbon Neutral Cities Alliance and adapt it to the international aviation context to illustrate how smart cities have the potential to help and support the international aviation industry meet their carbon emissions reduction obligations.
    Keywords: airlines; carbon emissions; smart cities; climate change; carbon offsetting scheme; sustainable aviation; greenhouse gases; GHG.

  • Performance analysis of more electric aircraft starter/generator by different electric loads   Order a copy of this article
    by Ufuk Kaya, Eyyup Oksuztepe 
    Abstract: The more electric aircraft is a trending topic in aviation studies. This topic comprises a wide range of applications that are directly related to electrical machines and power electronics. The starter/generator is one of these remarkable applications, and it is used for main engine cranking and required electrical power generation. In comparison with conventional starter and generator systems, the starter/generator is more robust, reliable, and cheap. Also, it requires almost no maintenance. Considering the increased demand for electrical power in commercial and military aircraft, the interest in starter/generators is increased in terms of scientific studies and industrial applications. In this study, a 20 kW starter/generator based on a three-phase surface-mounted permanent magnet synchronous machine is proposed and model reliability is tested with different types of and power-rated electrical loads. The proposed model is simulated at MATLAB/Simulink with Simscape blocks. The results show that the SG has sufficient performance for starter, and generator operation.
    Keywords: more electric aircraft; MEA; starter/generator; aircraft; permanent magnet synchronous machine; PMSM; electrical power generation.
    DOI: 10.1504/IJSA.2023.10051737
  • Design and analysis of a two-tier stretcher frame   Order a copy of this article
    by Amjath M. Barakathulla, Hua Qian Ang 
    Abstract: In the current market, commercial aircraft carry stretchers in single tiers. This requires approximately three seat rows to be rendered unusable, which can be costly for airlines, resulting in fewer airlines providing the service. An alternative mode of transport for stretcher bound patients is to travel via air ambulances, which is not only costly, but with distance limitations. In this paper, a solution to this is explored by the introduction of a two-tier stretcher frame, capable of carrying two stretcher bound patients on a selected commercial aviation stretcher. Three conceptual designs are generated and modelled on solidworks. The stress analysis of the design is simulated via Abaqus CAE and validated with theoretical calculations. Furthermore, a design failure modes and effects analysis and cost analysis of the design are carried out. It is concluded that all the requirements identified for the design are met and it is fit for use on the aircraft.
    Keywords: aircraft stretcher frame; product design; finite element modelling; emergency landing loads.
    DOI: 10.1504/IJSA.2023.10052158
  • Two-phase heat transfer devices for passive cooling of electric and hybrid aircraft onboard equipment   Order a copy of this article
    by Leonard L. Vasiliev, Alexander S. Zhuravlyov 
    Abstract: In connection with growing requirements for improving the environment, nowadays the world attaches importance to creation and enhancement of electric and hybrid airplanes, equipment of which is in need of effective cooling of its components heated by a passing current. The purpose of this work is to analyse the possibilities of using autonomous two-phase heat conductors (heat pipes, thermosyphons) and passive systems based on them for thermal control of equipment in electric and hybrid aircraft. The article discusses designs of heat pipes and thermosyphons, shows options for their use in electric and hybrid airplanes. The design and results of experimental studies of the kW-class loop thermosyphon with horizontal evaporator and condenser are presented. This thermosyphon has the right characteristics for use in thermal management systems: a high heat transfer capacity (up to 1.5 kW) and a short starting time.
    Keywords: thermal management; passive cooling system; heat pipe; thermosyphon.
    DOI: 10.1504/IJSA.2023.10052435
  • PC Air: an extreme case of fleet planning problems   Order a copy of this article
    by Orawan Nugprachaya, Poowin Bunyavejchewin 
    Abstract: From 2000 to 2019, a total of 31 airline firms were launched in Thailand but then shut down, mostly within a short period of time. Although a vast array of factors could contribute to airline failures, this study focuses on pitfalls in the airline fleet planning process, notably equipment selection and acquisition. Of the 31 defunct airlines, PC Air, a short-lived charter carrier, was selected for analysis since it was an extreme case study, representing a textbook pitfall trap in which airline firms have rarely fallen into in real-world aviation business situations. In the PC Air case, flawed fleet planning was a clear-cut error behind its collapse. This was exemplified through the unsound selection and acquisition of the used aircraft, which mismatched the airline’s mission and contradicted the charter carrier business model, and via its ill-advised decision to conduct commercial operations with only one aircraft.
    Keywords: airbus; A310-200; aircraft acquisition; aircraft selection; charter carrier; defunct Thai airlines; fleet management; fleet planning; PC Air; Thailand.
    DOI: 10.1504/IJSA.2023.10052471
  • An assessment of current marketing strategies of urban air mobility   Order a copy of this article
    by Volkan Yavas, Rustem Baris Yesilay 
    Abstract: Digitalisation with Industry 4.0, in electrical and autonomous vehicles which have self-travel and parking capabilities, have begun to affect and transform the transportation sector, mainly surface, and air transportation. Parallel to these developments, passenger demand has started to shift to electrical and autonomous vehicles. In this sense innovative marketing strategies are needed to eliminate consumer concerns such as environment, safety, and privacy especially for autonomous aircraft (UAM). The main goal of this study is to analyse the current situation of the UAM market. A content analysis, by using Vosviewer, is conducted on the marketing activities of companies that continue their certification studies on passenger transportation. It is found that there is no widespread marketing strategy or consumer focus for UAM in general, and the elements for promoting technology and aircraft attract attention.
    Keywords: urban air mobility; UAM; air taxi services; marketing; consumer acceptance; innovation.
    DOI: 10.1504/IJSA.2023.10052697
  • Transforming to NextGen air transportation system: a case study for Turkeys national aerospace development   Order a copy of this article
    by Mehmet Necati Cizrelioğullari, Tapdig Imanov 
    Abstract: Innovation of the air transportation system is crucial on all stages of its development, which requires continuous support. Modernisation of ageing equipment, development of new generation (NG) aircrafts and its systems makes necessary shifts to a next generation (NextGen) aviation industry era. This study compares the existing technologies of the air transportation system used in Turkey aviation industry with NextGen concept with presentation main pillars development of new elements and examines the leveraging feasibility new elements of the next generation (NextGen) concept that would be contribute efficiently use of the national airspace which includes satellite-based navigation and surveillance, advanced digital communications, integrated air traffic management and wide information sharing systems. Taking into account an increasing trend of development of the international and regional air transportation network from/to Turkey in the near future and is considered to apply the concept of NextGen in Turkish aviation industry in order to avoid difficulties in managing airspace. Result of the study states several benefits upon application of NextGen elements, but expected cost issues need to be defined by the government to invest for its implementation development.
    Keywords: air transportation; next generation; NextGen; airspace; aviation; Turkey.
    DOI: 10.1504/IJSA.2023.10053591
  • TRIAD aided adaptive Kalman filter for fault tolerant attitude estimation of a nanosatellite   Order a copy of this article
    by Hasan Kinatas, Chingiz Hajiyev 
    Abstract: In this study, a fault tolerant attitude estimation system is proposed for a nanosatellite, combining the TRIAD algorithm, a vector based attitude determination method, with an adaptive extended Kalman filter. As the first step of the estimation system, the TRIAD algorithm produces an initial coarse attitude estimation using three-axis magnetometer and sun sensor measurements. Then, this coarse estimation is filtered via an adaptive extended Kalman filter to obtain the final estimation. Besides filtering and providing more accurate estimations, the adaptive filter also makes the system fault tolerant by maintaining the estimation accuracy in cases where sensor faults exist and measurements become unreliable. This is made possible by tracking the filter’s innovation history and re-adjusting the Kalman gain using appropriately calculated fading factors. In order to verify the performance of the proposed system, two different simulations are performed where the attitude sensor outputs are disturbed by additional measurement noise.
    Keywords: nanosatellite; attitude estimation; adaptive Kalman filtering; fault; magnetometer; sun sensor.
    DOI: 10.1504/IJSA.2023.10053674