Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers
A linear frequency domain Navier-Stokes solver is used to retain the influence of turning, thickness, and main geometric parameters on turbine broadband noise. The methodology has been applied to predict the broadband interaction noise produced by a representative low-speed low-pressure turbine sect...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | International Journal of Turbomachinery, Propulsion and Power |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2504-186X/6/4/42 |
| _version_ | 1797503672308989952 |
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| author | Ricardo Blázquez-Navarro Roque Corral |
| author_facet | Ricardo Blázquez-Navarro Roque Corral |
| author_sort | Ricardo Blázquez-Navarro |
| collection | DOAJ |
| description | A linear frequency domain Navier-Stokes solver is used to retain the influence of turning, thickness, and main geometric parameters on turbine broadband noise. The methodology has been applied to predict the broadband interaction noise produced by a representative low-speed low-pressure turbine section. The differences in the spectra with respect to those yielded by state-of-the-art flat plate based methodologies are up to 6 dB. The differences are caused by multiple effects that semi-analytical methodologies do not account for. The most important are blade thickness and turning, which have been studied separately to quantify their impact on the broadband noise footprint. The influence of changing the turbine operating conditions has been discussed as well. The outlet sound pressure level scales with the third and second power of the inlet and outlet Mach number, respectively, for constant turbulence intensity, within most of the frequency range considered. |
| first_indexed | 2024-03-10T03:54:04Z |
| format | Article |
| id | doaj.art-cc33a49640f147e1adee38d48c73c945 |
| institution | Directory Open Access Journal |
| issn | 2504-186X |
| language | English |
| last_indexed | 2024-03-10T03:54:04Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Turbomachinery, Propulsion and Power |
| spelling | doaj.art-cc33a49640f147e1adee38d48c73c9452023-11-23T08:50:31ZengMDPI AGInternational Journal of Turbomachinery, Propulsion and Power2504-186X2021-11-01644210.3390/ijtpp6040042Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes SolversRicardo Blázquez-Navarro0Roque Corral1Department of Fluid Mechanics and Aerospace Propulsion, School of Aeronautics and Space, Universidad Politécnica de Madrid, 28040 Madrid, SpainDepartment of Fluid Mechanics and Aerospace Propulsion, School of Aeronautics and Space, Universidad Politécnica de Madrid, 28040 Madrid, SpainA linear frequency domain Navier-Stokes solver is used to retain the influence of turning, thickness, and main geometric parameters on turbine broadband noise. The methodology has been applied to predict the broadband interaction noise produced by a representative low-speed low-pressure turbine section. The differences in the spectra with respect to those yielded by state-of-the-art flat plate based methodologies are up to 6 dB. The differences are caused by multiple effects that semi-analytical methodologies do not account for. The most important are blade thickness and turning, which have been studied separately to quantify their impact on the broadband noise footprint. The influence of changing the turbine operating conditions has been discussed as well. The outlet sound pressure level scales with the third and second power of the inlet and outlet Mach number, respectively, for constant turbulence intensity, within most of the frequency range considered.https://www.mdpi.com/2504-186X/6/4/42aeroacousticsbroadband noiselow-pressure turbinelinearised Navier-Stokes |
| spellingShingle | Ricardo Blázquez-Navarro Roque Corral Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers International Journal of Turbomachinery, Propulsion and Power aeroacoustics broadband noise low-pressure turbine linearised Navier-Stokes |
| title | Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers |
| title_full | Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers |
| title_fullStr | Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers |
| title_full_unstemmed | Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers |
| title_short | Turbine Broadband Noise Predictions Using Linearised Frequency Domain Navier-Stokes Solvers |
| title_sort | turbine broadband noise predictions using linearised frequency domain navier stokes solvers |
| topic | aeroacoustics broadband noise low-pressure turbine linearised Navier-Stokes |
| url | https://www.mdpi.com/2504-186X/6/4/42 |
| work_keys_str_mv | AT ricardoblazqueznavarro turbinebroadbandnoisepredictionsusinglinearisedfrequencydomainnavierstokessolvers AT roquecorral turbinebroadbandnoisepredictionsusinglinearisedfrequencydomainnavierstokessolvers |