Sensitivity Analysis of Transonic Flow over J-78 Wings
3D transonic flow over swept and unswept wings with an J-78 airfoil at spanwise sections is studied numerically at negative and vanishing angles of attack. Solutions of the unsteady Reynolds-averaged Navier-Stokes equations are obtained with a finite-volume solver on unstructured meshes. The numeric...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/579343 |
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| author | Alexander Kuzmin |
| author_facet | Alexander Kuzmin |
| author_sort | Alexander Kuzmin |
| collection | DOAJ |
| description | 3D transonic flow over swept and unswept wings with an J-78 airfoil at spanwise sections is studied numerically at negative and vanishing angles of attack. Solutions of the unsteady Reynolds-averaged Navier-Stokes equations are obtained with a finite-volume solver on unstructured meshes. The numerical simulation shows that adverse Mach numbers, at which the lift coefficient is highly sensitive to small perturbations, are larger than those obtained earlier for 2D flow. Due to the larger Mach numbers, there is an onset of self-exciting oscillations of shock waves on the wings. The swept wing exhibits a higher sensitivity to variations of the Mach number than the unswept one. |
| format | Article |
| id | doaj-art-43191678184146dc8e06a74850c4cf22 |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-43191678184146dc8e06a74850c4cf222025-02-03T05:51:32ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742015-01-01201510.1155/2015/579343579343Sensitivity Analysis of Transonic Flow over J-78 WingsAlexander Kuzmin0St. Petersburg State University, 28 University Avenue, St. Petersburg 198504, Russia3D transonic flow over swept and unswept wings with an J-78 airfoil at spanwise sections is studied numerically at negative and vanishing angles of attack. Solutions of the unsteady Reynolds-averaged Navier-Stokes equations are obtained with a finite-volume solver on unstructured meshes. The numerical simulation shows that adverse Mach numbers, at which the lift coefficient is highly sensitive to small perturbations, are larger than those obtained earlier for 2D flow. Due to the larger Mach numbers, there is an onset of self-exciting oscillations of shock waves on the wings. The swept wing exhibits a higher sensitivity to variations of the Mach number than the unswept one.http://dx.doi.org/10.1155/2015/579343 |
| spellingShingle | Alexander Kuzmin Sensitivity Analysis of Transonic Flow over J-78 Wings International Journal of Aerospace Engineering |
| title | Sensitivity Analysis of Transonic Flow over J-78 Wings |
| title_full | Sensitivity Analysis of Transonic Flow over J-78 Wings |
| title_fullStr | Sensitivity Analysis of Transonic Flow over J-78 Wings |
| title_full_unstemmed | Sensitivity Analysis of Transonic Flow over J-78 Wings |
| title_short | Sensitivity Analysis of Transonic Flow over J-78 Wings |
| title_sort | sensitivity analysis of transonic flow over j 78 wings |
| url | http://dx.doi.org/10.1155/2015/579343 |
| work_keys_str_mv | AT alexanderkuzmin sensitivityanalysisoftransonicflowoverj78wings |