JO
J.R.P. Ottens
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Aviation faces increasing societal and regulatory pressure to reduce environmental impact, particularly noise in densely populated areas. Electric propulsion and Urban Air Mobility concepts aim to enable quieter flight. However, propeller generated aerodynamic noise remains a dominant contributor to the overall acoustic signature. Modelling broadband noise, associated with turbulent inflow and blade surface turbulence, is essential for realistic noise assessment.
This thesis develops a framework to evaluate broadband noise prediction models for (electrically driven) propellers in hover and forward flight. Two model are assessed: the classical Brooks, Pope, and Marcolini (BPM) model and the data-driven Gill and Lee (GL) model. Both are verified against literature and validated and compared using scaled hover experiments and full-scale flyover measurements.
Results show that the GL model performs well in hover but overpredicts noise in forward flight. The BPM model provides more consistent predictions across operating conditions. ...
This thesis develops a framework to evaluate broadband noise prediction models for (electrically driven) propellers in hover and forward flight. Two model are assessed: the classical Brooks, Pope, and Marcolini (BPM) model and the data-driven Gill and Lee (GL) model. Both are verified against literature and validated and compared using scaled hover experiments and full-scale flyover measurements.
Results show that the GL model performs well in hover but overpredicts noise in forward flight. The BPM model provides more consistent predictions across operating conditions. ...
Aviation faces increasing societal and regulatory pressure to reduce environmental impact, particularly noise in densely populated areas. Electric propulsion and Urban Air Mobility concepts aim to enable quieter flight. However, propeller generated aerodynamic noise remains a dominant contributor to the overall acoustic signature. Modelling broadband noise, associated with turbulent inflow and blade surface turbulence, is essential for realistic noise assessment.
This thesis develops a framework to evaluate broadband noise prediction models for (electrically driven) propellers in hover and forward flight. Two model are assessed: the classical Brooks, Pope, and Marcolini (BPM) model and the data-driven Gill and Lee (GL) model. Both are verified against literature and validated and compared using scaled hover experiments and full-scale flyover measurements.
Results show that the GL model performs well in hover but overpredicts noise in forward flight. The BPM model provides more consistent predictions across operating conditions.
This thesis develops a framework to evaluate broadband noise prediction models for (electrically driven) propellers in hover and forward flight. Two model are assessed: the classical Brooks, Pope, and Marcolini (BPM) model and the data-driven Gill and Lee (GL) model. Both are verified against literature and validated and compared using scaled hover experiments and full-scale flyover measurements.
Results show that the GL model performs well in hover but overpredicts noise in forward flight. The BPM model provides more consistent predictions across operating conditions.
Bachelor thesis
(2023)
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R.M. Bergmans, M.R. de Gooijer, J.A.J. Huigen, R.L. de Jong, J.T. Meij, J.R.P. Ottens, T.R.P. van der Paardt, L.F. Saanen, A. Schelling, E. Süülker, A. Anisimov, M.J. Ribeiro, J.S. Sonneveld
This report aims to detail the design process and final design for a Search and Rescue (SAR) drone that will search for victims under collapsed buildings. Firstly, the objectives and requirements for the drone system are given by the overall mission objectives. Then a detailed description of the design for each subsystem is presented. This is followed by an overview of the combined and integrated system. Subsequently, a performance analysis and a use case example of the system are given to indicate how the drone will perform during a mission.
Furthermore, the Reliability, Availability, Maintainability and Safety (RAMS) characteristics are displayed together with an overview of how sustainability has been integrated into the design. The plan for how further development and eventual production will be tackled is proposed. The
operational aspect is also discussed. The report finishes with an overall financial evaluation of the product and the main conclusions and recommendations found during the design process. The report is a continuation and overview of the work done and detailed in the Project Plan,
Baseline Report and Midterm Report by Bergmans et al. [2–4]... ...
Furthermore, the Reliability, Availability, Maintainability and Safety (RAMS) characteristics are displayed together with an overview of how sustainability has been integrated into the design. The plan for how further development and eventual production will be tackled is proposed. The
operational aspect is also discussed. The report finishes with an overall financial evaluation of the product and the main conclusions and recommendations found during the design process. The report is a continuation and overview of the work done and detailed in the Project Plan,
Baseline Report and Midterm Report by Bergmans et al. [2–4]... ...
This report aims to detail the design process and final design for a Search and Rescue (SAR) drone that will search for victims under collapsed buildings. Firstly, the objectives and requirements for the drone system are given by the overall mission objectives. Then a detailed description of the design for each subsystem is presented. This is followed by an overview of the combined and integrated system. Subsequently, a performance analysis and a use case example of the system are given to indicate how the drone will perform during a mission.
Furthermore, the Reliability, Availability, Maintainability and Safety (RAMS) characteristics are displayed together with an overview of how sustainability has been integrated into the design. The plan for how further development and eventual production will be tackled is proposed. The
operational aspect is also discussed. The report finishes with an overall financial evaluation of the product and the main conclusions and recommendations found during the design process. The report is a continuation and overview of the work done and detailed in the Project Plan,
Baseline Report and Midterm Report by Bergmans et al. [2–4]...
Furthermore, the Reliability, Availability, Maintainability and Safety (RAMS) characteristics are displayed together with an overview of how sustainability has been integrated into the design. The plan for how further development and eventual production will be tackled is proposed. The
operational aspect is also discussed. The report finishes with an overall financial evaluation of the product and the main conclusions and recommendations found during the design process. The report is a continuation and overview of the work done and detailed in the Project Plan,
Baseline Report and Midterm Report by Bergmans et al. [2–4]...