Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover
The aim of the present work is the improvement of a free-wake model for the analysis of a small-scale two-bladed propeller in hover. The simulations are carried out using a BEM approach implemented in the medium-fidelity solver RAMSYS. An acoustic validation is also performed using the developed too...
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MDPI AG
2024-12-01
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| author | Manuel Iannotta Antonio Visingardi Domenico Quagliarella Fabrizio De Gregorio Mattia Barbarino Alex Zanotti |
| author_facet | Manuel Iannotta Antonio Visingardi Domenico Quagliarella Fabrizio De Gregorio Mattia Barbarino Alex Zanotti |
| author_sort | Manuel Iannotta |
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| description | The aim of the present work is the improvement of a free-wake model for the analysis of a small-scale two-bladed propeller in hover. The simulations are carried out using a BEM approach implemented in the medium-fidelity solver RAMSYS. An acoustic validation is also performed using the developed tool ACO-FWH. The work proves that even mild discrepancies in the propeller geometry must be accounted for as their influence is not negligible, especially on the aeroacoustics of the propeller. In particular, the proper modeling of the blades enables the correct identification of the sub-harmonics of the SPL spectra. An optimization procedure based on the application of the evolutionary Genetic Algorithm is followed to identify the values of the parameters describing the dissipative and diffusive properties in the Bhagwat–Leishman vortex core model, an upgraded version of the classical Lamb–Oseen one. On average, this approach enabled the further improvement of the accuracy of the numerical model in terms of acoustic signature evaluation with respect to the one obtained by only modeling blade dissimilarities. The results obtained demonstrate the promising capabilities of a fine-tuned free-wake medium-fidelity approach to simulate the aerodynamic and acoustic details of a small-scale propeller in hover, provided the accurate geometrical modeling of the propeller and the selection of suitable parameters to be used in the wake modeling. |
| format | Article |
| id | doaj-art-f4ca6578d30e4106aa13104404adb7fc |
| institution | Kabale University |
| issn | 2226-4310 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Aerospace |
| spelling | doaj-art-f4ca6578d30e4106aa13104404adb7fc2025-01-24T13:15:24ZengMDPI AGAerospace2226-43102024-12-01121510.3390/aerospace12010005Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in HoverManuel Iannotta0Antonio Visingardi1Domenico Quagliarella2Fabrizio De Gregorio3Mattia Barbarino4Alex Zanotti5Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, 20156 Milan, ItalyCentro Italiano Ricerche Aerospaziali, Via Maiorise, 81043 Capua, ItalyCentro Italiano Ricerche Aerospaziali, Via Maiorise, 81043 Capua, ItalyCentro Italiano Ricerche Aerospaziali, Via Maiorise, 81043 Capua, ItalyCentro Italiano Ricerche Aerospaziali, Via Maiorise, 81043 Capua, ItalyDipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa 34, 20156 Milan, ItalyThe aim of the present work is the improvement of a free-wake model for the analysis of a small-scale two-bladed propeller in hover. The simulations are carried out using a BEM approach implemented in the medium-fidelity solver RAMSYS. An acoustic validation is also performed using the developed tool ACO-FWH. The work proves that even mild discrepancies in the propeller geometry must be accounted for as their influence is not negligible, especially on the aeroacoustics of the propeller. In particular, the proper modeling of the blades enables the correct identification of the sub-harmonics of the SPL spectra. An optimization procedure based on the application of the evolutionary Genetic Algorithm is followed to identify the values of the parameters describing the dissipative and diffusive properties in the Bhagwat–Leishman vortex core model, an upgraded version of the classical Lamb–Oseen one. On average, this approach enabled the further improvement of the accuracy of the numerical model in terms of acoustic signature evaluation with respect to the one obtained by only modeling blade dissimilarities. The results obtained demonstrate the promising capabilities of a fine-tuned free-wake medium-fidelity approach to simulate the aerodynamic and acoustic details of a small-scale propeller in hover, provided the accurate geometrical modeling of the propeller and the selection of suitable parameters to be used in the wake modeling.https://www.mdpi.com/2226-4310/12/1/5aeroacousticsaerodynamicspropellereVTOLfree-wake modelsPIV |
| spellingShingle | Manuel Iannotta Antonio Visingardi Domenico Quagliarella Fabrizio De Gregorio Mattia Barbarino Alex Zanotti Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover Aerospace aeroacoustics aerodynamics propeller eVTOL free-wake models PIV |
| title | Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover |
| title_full | Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover |
| title_fullStr | Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover |
| title_full_unstemmed | Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover |
| title_short | Improvement of a Free-Wake Model for the Aerodynamic and Aeroacoustic Analysis of a Small-Scale Two-Bladed Propeller in Hover |
| title_sort | improvement of a free wake model for the aerodynamic and aeroacoustic analysis of a small scale two bladed propeller in hover |
| topic | aeroacoustics aerodynamics propeller eVTOL free-wake models PIV |
| url | https://www.mdpi.com/2226-4310/12/1/5 |
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