Academic Journal
Direct numerical simulation, large eddy simulation and unsteady Reynolds-averaged Navier—Stokes simulations of periodic unsteady flow in a low-pressure turbine cascade: A comparison
| العنوان: | Direct numerical simulation, large eddy simulation and unsteady Reynolds-averaged Navier—Stokes simulations of periodic unsteady flow in a low-pressure turbine cascade: A comparison |
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| المؤلفون: | Michelassi, V, Wissink, J. G., Rodi, W |
| المصدر: | Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy ; volume 217, issue 4, page 403-411 ; ISSN 0957-6509 2041-2967 |
| بيانات النشر: | SAGE Publications |
| سنة النشر: | 2003 |
| الوصف: | The unsteady periodic flow in a low-pressure (LP) prismatic turbine vane with incoming wakes is computed by direct numerical simulation (DNS), large eddy simulation (LES) and unsteady Reynolds-averaged Navier—Stokes simulations (URANSs). The results are compared with existing measurements at a Reynolds number Re = 5.18 × 10 4 which reveal the presence of a large unsteady stalled region on the suction side. Both DNS and LES suggest that the boundary layer separates while being still laminar, with subsequent turbulent reattachment. Several URANSs with and without a transition model and a constraint on the turbulence time-scale designed to prevent excessive production in the stagnation region are analysed and compared with the DNS and LES. The useful information provided by DNS and LES has made it possible to improve the results of the URANSs, which ensure a fair reproduction of the flow, especially in terms of blade load and losses, although they partly fail to detail the complex wake—boundary layer interaction in the separated flow region. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1243/095765003322315469 |
| الاتاحة: | https://doi.org/10.1243/095765003322315469 https://journals.sagepub.com/doi/pdf/10.1243/095765003322315469 |
| Rights: | https://journals.sagepub.com/page/policies/text-and-data-mining-license |
| رقم الانضمام: | edsbas.175E8308 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1243/095765003322315469 |
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