Hybrid journal (It can contain Open Access articles) ISSN (Print) 2050-0467 - ISSN (Online) 2050-0475 Published by Inderscience Publishers[450 journals]
Authors:Yul Hyun Cho, Jun Oh Lee, Byung Heum Song, Kwang Eui Yoo Pages: 161 - 171 Abstract: Fuel-efficient flight operation provides airlines with significant competitive edge. Fuel savings in flight can be done by reducing the total aircraft weight. This study investigates the possibility of reducing the amount of discretionary fuel loaded onto aircraft while maintaining the proper safety margin for the flight based on a statistical analysis with empirical data. We found that the data were appropriate for a lognormal distribution. This study adopted a fuel shortage probability standard of less than 5%, according the International Civil Aviation Organization (ICAO) recommendation. We were able to estimate a reasonable quantity of fuel load from this study. According to our data analysis, airlines can save a significant amount of fuel consumption by reducing discretionary fuel. The results of the study may contribute to fuel savings by reducing discretionary fuel loading for aircraft, hence lowering fuel costs for the airlines without internal fuel management system. Keywords: discretionary fuel; safety margin; fuel savings; lognormal; dispatcher; fuel management; contingency fuel; carbon offsetting; aviation; airline fuel strategy; operational safety; greenhouse gas Citation: International Journal of Sustainable Aviation, Vol. 6, No. 3 (2020) pp. 161 - 171 PubDate: 2021-01-04T23:20:50-05:00 DOI: 10.1504/IJSA.2020.112204 Issue No:Vol. 6, No. 3 (2021)
Authors:Mürvet BektaÅ, Mehmet Ali Güler, Dilek Funda KurtuluÅ Pages: 172 - 194 Abstract: Aerodynamics and structural dynamics of the insect wings are widely considered in flapping wing micro air vehicle (FWMAV) applications. In this paper, the aerodynamic characteristics of the three-dimensional flapping wing models mimicked from the bumblebee and hawkmoth wings are numerically investigated under steady flow conditions. This study aims to simulate the one-way fluid-structure interaction (FSI) of these bio-inspired wings by transferring the aerodynamic load obtained from the computational fluid dynamics (CFD) into the finite element method (FEM) solver as a pressure load. The static aeroelastic responses of the wings under the pressure load are compared for different materials, namely, cuticle, aluminium alloy, and titanium alloy at various angles of attack (<i>α</i> = 0°-90°). CFD analysis shows that the hawkmoth wing model at α = 5° has the highest lift-to-drag ratio (<i>L</i>/<i>D</i>). FSI analysis demonstrates that the cuticle hawkmoth wing model at <i>α</i> = 90° undergoes the highest tip deflection. Keywords: FWMAV; bumblebee wing; hawkmoth wing; wing aerodynamics; computational fluid dynamics; CFD; wing deformation; finite element method; FEM; one-way FSI; static aeroelasticity Citation: International Journal of Sustainable Aviation, Vol. 6, No. 3 (2020) pp. 172 - 194 PubDate: 2021-01-04T23:20:50-05:00 DOI: 10.1504/IJSA.2020.112163 Issue No:Vol. 6, No. 3 (2021)
Authors:Scott R. Winter, Tracy L. Lamb, Bradley S. Baugh Pages: 195 - 219 Abstract: The purpose of these studies was to examine how the type of propulsion system impacted the willingness to fly in a hypothetical scenario. Using a sample of 624 participants from the USA across two studies, it was found, in general, that participants were most willing to fly using traditional jet fuel or a biofuel followed by battery/electric and then solar-powered aircraft. There were no significant differences based on participant gender, any significant interactions nor any significant mediators between the type of propulsion and the willingness to fly. Still, familiarity with sustainability, willingness to pay for sustainability, and environmental commitment were found to be significant moderators. In cases where participants had high levels of the three moderating variables, they were significantly more willing to fly using sustainable propulsion systems than compared to low levels of the moderating variables. The study concludes with a discussion of these findings and the practical applications of this research. Keywords: sustainability; aviation; biofuels; electric power; solar power; mediation; moderation Citation: International Journal of Sustainable Aviation, Vol. 6, No. 3 (2020) pp. 195 - 219 PubDate: 2021-01-04T23:20:50-05:00 DOI: 10.1504/IJSA.2020.112111 Issue No:Vol. 6, No. 3 (2021)
Authors:Ayse Kucuk Yilmaz, Konstantinos Malagas, Muhammad Jawad, Nikitas Nikitakos Pages: 220 - 235 Abstract: Approved training organisations should invest the right amount of resources to make the appropriate aircraft selection decision. Elements in the strategic, economic and environmental categories and various risk criteria have the potential to affect directly or indirectly this selection decision and should consider. This research aimed to provide a criteria analysis to support the aircraft selection decision process for a flight school, examining the case of the Eskisehir Technical University Flight School. Concerning methodology, risk analysis with integrated of both analytic hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS) are used. number of experts (n = 16) participated in the study. Our analysis results show that, Cessna 172S Cessna/Reims-Cessna 172/F172 series aircraft types are the best alternative for the specific optimisation case. The current research both contribute to the aviation management and engineering literature and may help managers/instructors/supervisors from training organisations to identify ways to select the appropriate aircraft. Keywords: management and strategy; multi-criteria problem solving; risk analysis; decision making process; analytic hierarchy process; AHP; approved training organisations; ATOs; TOPSIS; aircraft selection Citation: International Journal of Sustainable Aviation, Vol. 6, No. 3 (2020) pp. 220 - 235 PubDate: 2021-01-04T23:20:50-05:00 DOI: 10.1504/IJSA.2020.112091 Issue No:Vol. 6, No. 3 (2021)
Authors:Mustafa Karabacak, Onder Turan Pages: 236 - 246 Abstract: This study focuses on afterburner turbofan engine weight estimation for fifth generation fighter aircrafts. Model developed in this study by investigating 26 engine cases categorised by the criteria the requirement of selection amongst to engines expected to be used in fifth generation fighter depend on four parameters with ≈ ±25% error. Technology level effect engine weight strongly so parameter reflect technology level is determined based on new technology engines used in fifth generation fighter aircraft by statistical method. Model reflect technology level is expected to be used in conceptual design stages of fifth generation fighter engine. Keywords: fifth fighter aircraft; thrust/weight ratio; afterburner; turbofan Citation: International Journal of Sustainable Aviation, Vol. 6, No. 3 (2020) pp. 236 - 246 PubDate: 2021-01-04T23:20:50-05:00 DOI: 10.1504/IJSA.2020.112087 Issue No:Vol. 6, No. 3 (2021)