Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis
Unsteady flow around an oscillating plate cascade and that through a single compressor rotor subject to vibration have been computationally studied, aimed at examining the predictive ability of two low fidelity frequency methods compared with a high fidelity time-domain solution method for aeroelast...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2016/4293414 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832548683332190208 |
|---|---|
| author | M. T. Rahmati |
| author_facet | M. T. Rahmati |
| author_sort | M. T. Rahmati |
| collection | DOAJ |
| description | Unsteady flow around an oscillating plate cascade and that through a single compressor rotor subject to vibration have been computationally studied, aimed at examining the predictive ability of two low fidelity frequency methods compared with a high fidelity time-domain solution method for aeroelasticity. The computational solutions demonstrate the capabilities of the frequency domain methods compared with the nonlinear time-domain solution method in capturing small perturbations in the unsteady flow. They also show the great advantage of significant CPU time saving by the frequency methods over the nonlinear time method. Comparisons of two different frequency methods, nonlinear harmonic and phase solution method, show that these methods can produce different results due to the differences in numeric and physical conditioning. The results obtained using phase solutions method are in better agreement with the nonlinear time-domain solution. This is because the same numeric and physical conditioning are used in both the nonlinear time-domain method and phase solution frequency domain method. |
| format | Article |
| id | doaj-art-80cc8ae93d2c4ef58a815297837ff74f |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-80cc8ae93d2c4ef58a815297837ff74f2025-02-03T06:13:25ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342016-01-01201610.1155/2016/42934144293414Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical AnalysisM. T. Rahmati0Department of Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, UKUnsteady flow around an oscillating plate cascade and that through a single compressor rotor subject to vibration have been computationally studied, aimed at examining the predictive ability of two low fidelity frequency methods compared with a high fidelity time-domain solution method for aeroelasticity. The computational solutions demonstrate the capabilities of the frequency domain methods compared with the nonlinear time-domain solution method in capturing small perturbations in the unsteady flow. They also show the great advantage of significant CPU time saving by the frequency methods over the nonlinear time method. Comparisons of two different frequency methods, nonlinear harmonic and phase solution method, show that these methods can produce different results due to the differences in numeric and physical conditioning. The results obtained using phase solutions method are in better agreement with the nonlinear time-domain solution. This is because the same numeric and physical conditioning are used in both the nonlinear time-domain method and phase solution frequency domain method.http://dx.doi.org/10.1155/2016/4293414 |
| spellingShingle | M. T. Rahmati Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis International Journal of Rotating Machinery |
| title | Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis |
| title_full | Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis |
| title_fullStr | Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis |
| title_full_unstemmed | Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis |
| title_short | Comparison of Frequency Domain and Time-Domain Methods for Aeromechanical Analysis |
| title_sort | comparison of frequency domain and time domain methods for aeromechanical analysis |
| url | http://dx.doi.org/10.1155/2016/4293414 |
| work_keys_str_mv | AT mtrahmati comparisonoffrequencydomainandtimedomainmethodsforaeromechanicalanalysis |