@misc{GrasseltHoeschlerKazula, author = {Grasselt, David and H{\"o}schler, Klaus and Kazula, Stefan}, title = {A Design Approach for a Coupled Actuator System for Variable Nozzles and Thrust Reverser of Aero Engines}, series = {Proceedings of ISABE 2017, ISABE-2017-21450, Manchester, September 3.-8., 2017}, journal = {Proceedings of ISABE 2017, ISABE-2017-21450, Manchester, September 3.-8., 2017}, publisher = {ISABE}, pages = {11}, language = {en} } @misc{KazulaGrasseltMischkeetal., author = {Kazula, Stefan and Grasselt, David and Mischke, Marcel and H{\"o}schler, Klaus}, title = {Preliminary safety assessment of circular variable nacelle inlet concepts for aero engines in civil aviation}, series = {Safety and Reliability - Safe Societies in a Changing World}, journal = {Safety and Reliability - Safe Societies in a Changing World}, publisher = {Taylor \& Francis Group}, address = {London}, isbn = {978-0-8153-8682-7}, pages = {2459 -- 2467}, abstract = {A safe design process and its application are introduced to a concept study for circular variable aero engine inlets. The paper highlights the tasks of inlets, the compromise in designing them and how using variable inlets could solve this compromise and allow for faster and more efficient commercial aircraft. However, high safety and reliability requirements bring up disadvantages. Tackling these disadvantages, a systems engineering approach is complemented by a safety assessment process, according to Aerospace Recommended Practice ARP 4754A. Safety methods that are applicable during early phases of the product development process are presented and applied to develop feasible variable inlet concepts. Hence, safety requirements, potential failure events and resulting failure modes are systematically identified, assessed and mitigated. The mitigation of a failure condition by the means of redundancy within the adjustment control system is presented.}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Ice detection and protection systems for circular variable nacelle inlet concepts}, series = {Deutscher Luft- und Raumfahrtkongress 2018, Friedrichshafen, 4. bis 6. September 2018}, journal = {Deutscher Luft- und Raumfahrtkongress 2018, Friedrichshafen, 4. bis 6. September 2018}, pages = {1 -- 15}, abstract = {This paper presents the challenge of ice protection within a concept study for variable aero engine inlets in civil aviation. An overview of variable inlet concept groups, ice detection and protection mechanisms is given. These ice protection systems are assigned to the respective inlet concept groups and evaluated regarding economic, functional and safety requirements to determine the most suitable combinations.}, language = {en} } @misc{RichWorlitzGoldmannetal., author = {Rich, Beatrice Monique and Worlitz, Jane and Goldmann, Christine and Schulze, Mathias and Kazula, Stefan and Woll, Ralf}, title = {Preparing STEM Students for Leading Positions through Supervising Younger Students}, series = {2018 International Conference on Teaching, Assessment, and Learning for Engineering (TALE), 4-7 December 2018, Wollongong, NSW, Australia}, journal = {2018 International Conference on Teaching, Assessment, and Learning for Engineering (TALE), 4-7 December 2018, Wollongong, NSW, Australia}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5386-6522-0}, doi = {10.1109/TALE.2018.8615359}, pages = {835 -- 839}, abstract = {Social and leadership skills are often neglected during studies (especially in STEM subjects). It is precisely these skills that are urgently needed in professional life. The CoMeT "Concepts, Methods and Techniques for Project Management" module was developed to meet the need to acquire social and leadership skills. After a preliminary consideration an overview of the module is given. First, the teaching and learning concept is presented and insights into the seminar work are given. In addition to the competence-oriented examination methods, the integration of digital elements are presented. The continuous further development of the module, adapted to the needs of students and the economy, is a constant goal of the teachers. For this reason, there are already transmission possibilities of the module in planning. Instead of instructing groups of students in project work, pupils are to be introduced to science and study through small projects.}, language = {en} } @misc{KazulaRichHoeschleretal., author = {Kazula, Stefan and Rich, Beatrice Monique and H{\"o}schler, Klaus and Woll, Ralf}, title = {Awakening the Interest of High School Pupils in Science, Technology, Engineering and Mathematics Studies and Careers through Scientific Projects}, series = {2018 International Conference on Teaching, Assessment, and Learning for Engineering (TALE), 4-7 December 2018, Wollongong, NSW, Australia}, journal = {2018 International Conference on Teaching, Assessment, and Learning for Engineering (TALE), 4-7 December 2018, Wollongong, NSW, Australia}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5386-6522-0}, doi = {10.1109/TALE.2018.8615418}, pages = {259 -- 265}, abstract = {This paper presents the application of a scientific project concerning variable aero engine inlets, which was conducted within the scope of a high school course over the period of two years. The motivation of developing variable aero engine inlets with a group of pupils is introduced. The approach that is utilised during that course and its implementation are described. The results and benefits of this project for pupils, supervisor, school and university are summarised, e.g. providing the pupils with necessary knowledge and assisting them with their career choices, potentially resulting in increased enrolment numbers and lower dropout rates in science, technology, engineering and mathematics study programmes. An overview of a follow-up project that enables a larger group of pupils and a yearly implementation of a similar course is given. Within the scope of that course, university students will supervise smaller scientific projects that are conducted by groups of pupils over the period of one semester, providing additional benefits for students' soft skills, e.g. communication and conflict management skills.}, language = {en} } @misc{KoenigMischkePohletal., author = {K{\"o}nig, Paul and Mischke, Marcel and Pohl, Michael and Kazula, Stefan and H{\"o}schler, Klaus}, title = {Concept Development and Evaluation for a Broadband Noise Absorbing Acoustic Liner Concept for Aviation}, series = {24th International Society For Air Breathing Engines (ISABE-2019-24261), 22.-27. September 2019}, journal = {24th International Society For Air Breathing Engines (ISABE-2019-24261), 22.-27. September 2019}, abstract = {This paper presents design adaptations during the further development of innovative broadband acoustic liner concepts (Foil Helmholtz Resonator Liner; FHR-Liners) which utilise flexible foils within a honeycomb structure to attenuate engine and aircraft noise. The requirements for acoustic liners in aviation are described and utilised to derive evaluation criteria. Modifications of the FHR-Liner concept are introduced. A suitable concept evaluation method based on VDI 2225 is applied to evaluate the modified liner concepts concerning the main evaluation criteria.}, language = {en} } @misc{KazulaHoeschler, author = {Kazula, Stefan and H{\"o}schler, Klaus}, title = {Ice detection and protection systems for circular variable nacelle inlet concepts}, series = {CEAS Aeronautical Journal}, volume = {11}, journal = {CEAS Aeronautical Journal}, number = {1}, issn = {1869-5590}, doi = {10.1007/s13272-019-00413-1}, pages = {229 -- 248}, abstract = {This paper presents the challenge of ice protection within a concept study for variable pitot inlets of aero engines in transonic and supersonic civil aviation. An overview of variable inlet concept groups that adjust the inlet geometry by rigid segment repositioning, elastic surface deformation, or boundary layer control is given. Ice detection mechanisms and various pneumatic, fluid, as well as electric ice protection systems are presented. These ice protection systems are assigned to the respective inlet concept groups and evaluated regarding economic, functional, and safety requirements by means of pairwise comparison and weighted point rating to determine the most suitable combinations.}, language = {en} } @misc{KazulaWoellnerGrasseltetal., author = {Kazula, Stefan and W{\"o}llner, Mark and Grasselt, David and H{\"o}schler, Klaus}, title = {Parametric Design Study on Aerodynamic Characteristics of Variable Pitot Inlets for Transonic and Supersonic Civil Aviation}, series = {MATEC Web of Conferences : Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, volume = {304}, journal = {MATEC Web of Conferences : Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, issn = {2261-236X}, doi = {10.1051/matecconf/201930402017}, pages = {8}, abstract = {This paper reveals the influence of selected geometric parameters on the aerodynamic performance of circular variable aero engine inlets in transonic and supersonic civil aviation. The trade-off in inlet design and aerodynamic evaluation parameters are 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. 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.}, language = {en} } @misc{KazulaMischkeKoenigetal., author = {Kazula, Stefan and Mischke, Marcel and K{\"o}nig, Paul and H{\"o}schler, Klaus}, title = {Evaluation of Variable Pitot Inlet Concepts for Transonic and Supersonic Civil Aviation}, series = {MATEC Web of Conferences : Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, volume = {304}, journal = {MATEC Web of Conferences : Proceedings of the 9th EASN International Conference on Innovation in Aviation \& Space}, issn = {2261-236X}, doi = {10.1051/matecconf/201930402016}, pages = {8}, abstract = {This paper describes the selection of the ideal variable inlet concept group by utilising results of aerodynamic investigations, system safety analyses and integration studies. 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. By means of this evaluation, the concept group that adjusts the inlet geometry by rigid segment repositioning is identified as most suitable concept group. 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{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} }