@misc{KazulaWoellnerGrasseltetal., author = {Kazula, Stefan and W{\"o}llner, Mark and Grasselt, David and H{\"o}schler, Klaus}, title = {Ideal Geometries and Potential Benefit of Variable Pitot Inlets for Subsonic and Supersonic Business Aviation}, series = {8TH EUROPEAN CONFERENCE FOR AERONAUTICS AND SPACE SCIENCES (EUCASS)}, journal = {8TH EUROPEAN CONFERENCE FOR AERONAUTICS AND SPACE SCIENCES (EUCASS)}, doi = {10.13009/EUCASS2019-314}, abstract = {The challenge of determining ideal inlet geometries for variable pitot aero engine inlets in transonic and supersonic civil aviation is presented. The trade-off in inlet design and the geometric inlet parameters are introduced. By means of a parametric design study, feasible inlet geometries for variable inlets are identified and the potential aerodynamic benefit of using variable pitot inlets for flight speeds from Mach 0.95, 1.3 up to 1.6 is examined. After considering the additional weight of variable inlets, for instance due to required actuators, a remaining range benefit of over 20\% at a flight speed of Mach 1.6 is determined.}, language = {en} } @misc{MischkeKazulaHoeschler, author = {Mischke, Marcel and Kazula, Stefan and H{\"o}schler, Klaus}, title = {Preliminary Safety Assessment on System Design Level for Broadband Acoustic Liner Concepts for Aviation}, series = {Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, journal = {Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, address = {Athen}, doi = {10.1051/matecconf/201930404010}, pages = {8}, abstract = {Selected methods of the aviation safety assessment process according to ARP 4761 are introduced and conducted within the scope of a concept study for future broadband acoustic liners. While having similar primary functions and basic design, the acoustic liner concepts diverge concerning subfunctions and potential malfunctions. With the ARP 4761 safety assessment methods, significant differences in sub functions and possible malfunctions of the concepts can be identified. The results of the safety assessment are discussed, and the concepts are evaluated in terms of feasibility and safety.}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Evaluation of variable pitot inlet concepts for transonic and supersonic civil aviation}, series = {Aircraft Engineering and Aerospace Technology}, volume = {92}, journal = {Aircraft Engineering and Aerospace Technology}, number = {6}, issn = {0002-2667}, doi = {10.1108/AEAT-11-2019-0225}, pages = {807 -- 815}, abstract = {Purpose - This paper aims to describe the selection of the ideal variable inlet concept group by using results of aerodynamic investigations, system safety analyses and integration studies. Design/methodology/approach - Aerodynamic and functional inlet requirements are explained and variable inlet concept groups are introduced. The concept evaluation by means of a weighted point rating is presented. The respective concept groups are analysed and evaluated regarding economic, functional and safety requirements. Findings - By means of this evaluation, the concept group that adjusts the inlet geometry by rigid segment repositioning is identified as most suitable concept group. Originality/value - The early selection of the most suitable concept group enables more detailed subsequent concept investigations, potentially enabling the technology of variable inlets for future commercial aircraft.}, language = {en} } @misc{KazulaWoellnerHoeschler, author = {Kazula, Stefan and W{\"o}llner, Mark and H{\"o}schler, Klaus}, title = {Identification of efficient geometries for variable pitot inlets for supersonic transport}, series = {Aircraft Engineering and Aerospace Technology}, volume = {92}, journal = {Aircraft Engineering and Aerospace Technology}, number = {7}, issn = {0002-2667}, doi = {10.1108/AEAT-11-2019-0228}, pages = {981 -- 992}, abstract = {Purpose - This paper aims to reveal the influence of selected geometric parameters on the aerodynamic performance of circular variable aero engine inlets in transonic and supersonic civil aviation. Design/methodology/approach - The trade-off in inlet design and aerodynamic evaluation parameters is presented. The approach to investigate the dependencies between the aerodynamic and geometric parameters at different flight conditions by means of a parametric design study is introduced. Findings - The dependencies of inlet drag and efficiency from geometric parameters at flight speeds of Mach 0.95 up to Mach 1.6 are identified. Although entailing additional weight, the inlet length represents the parameter with the highest potential for drag reduction by up to 50\% in the selected design space. Ideal geometries for variable pitot inlets are determined. After considering weight, their potential range benefit nearly disappears for subsonic applications, but remains above 20\% for supersonic flight at Mach 1.6. Originality/value - Hence, the technology of circular variable pitot inlets for supersonic transport aircraft could be a way to achieve the ambitious ecological, safety and economic goals for future civil aviation.}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Review of Variable Leading Edge Patents for Aircraft Wings and Engine Inlets and Their Relevance for Variable Pitot Inlets in Future Supersonic Transport}, series = {Deutscher Luft- und Raumfahrtkongress 2020, Online, 1. bis 3. September 2020}, journal = {Deutscher Luft- und Raumfahrtkongress 2020, Online, 1. bis 3. September 2020}, abstract = {The motivation for designing variable pitot inlets for future supersonic transport (SST) is explained. A comprehensive overview of existing technological solutions for variable leading edges of aircraft wings and engines inlets is given. The advantages and limitations of over 80 solutions, as well as their relevance for application on variable pitot inlets for SST are analysed. These analyses emphasis challenges of existing solution options concerning design methodologies, level of detail and experience with a technology.}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {A Variable Pitot-Inlet Concept for Supersonic Aviation}, series = {Global Power \& Propulsion Society GPPS Chania20, Online, 7th - 9th September 2020}, journal = {Global Power \& Propulsion Society GPPS Chania20, Online, 7th - 9th September 2020}, issn = {2504-4400}, doi = {10.33737/gpps20-tc-49}, pages = {10}, abstract = {An overview of aero-engine inlets, the design process in aviation and a safe design approach for academic studies is provided. By means of a safe design approach, a variable inlet concept is developed up to technology readiness level (TRL) 3 and described. The application of safety and reliability methods, aerodynamic and structural analyses, as well as functional demonstrators proves the feasibility of the present variable inlet concept and highlights its potential for application in future supersonic transport (SST).}, language = {en} } @phdthesis{Kazula, author = {Kazula, Stefan}, title = {Variable Pitot-Triebwerkseinl{\"a}sse f{\"u}r kommerzielle {\"U}berschallflugzeuge - Konzeptstudie mittels eines Entwicklungsansatzes f{\"u}r sichere Produkte}, publisher = {Springer Vieweg}, address = {Wiesbaden}, isbn = {978-3-658-35455-8}, doi = {10.1007/978-3-658-35456-5}, pages = {XXX, 373}, language = {de} } @misc{KazulaRichHoeschleretal., author = {Kazula, Stefan and Rich, Beatrice Monique and H{\"o}schler, Klaus and Woll, Ralf}, title = {Interest High School Students in STEM Studies, while Preparing STEM Students for Leading Positions}, series = {2021 IEEE Global Engineering Education Conference}, volume = {2021}, journal = {2021 IEEE Global Engineering Education Conference}, isbn = {978-1-7281-8478-4}, doi = {10.1109/EDUCON46332.2021.9454011}, pages = {910 -- 914}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Sustainable Supersonic Transport: a Case Study on Variable Pitot Inlets}, series = {9th European Conference for Aeronautics and Space Sciences (Eucass)}, journal = {9th European Conference for Aeronautics and Space Sciences (Eucass)}, doi = {10.13009/EUCASS2022-4600}, pages = {14}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Review of variable leading-edge patents for aircraft wings and engine inlets and their relevance for variable pitot inlets in future supersonic transport}, series = {CEAS Aeronautical Journal}, volume = {12}, journal = {CEAS Aeronautical Journal}, number = {3}, issn = {1869-5582}, doi = {10.1007/s13272-021-00520-y}, pages = {685 -- 700}, abstract = {The motivation for designing variable pitot inlets for future supersonic transport (SST) is explained. A comprehensive overview of existing technological solutions for variable leading edges of aircraft wings and engine inlets is given. The advantages and limitations of over 80 solutions, as well as their relevance for application on variable pitot inlets for SST are described. The challenges of existing solution options concerning design methodologies, level of detail, and experience with a technology are identified.}, language = {en} }