Experimental and numerical investigations of a linear turbine cascade with sweep and dihedral
| Autor: | Aufderheide, Thorben, Stark, Udo, Frantzheld, Philip, Friedrichs, Jens |
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| Přispěvatelé: | Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Legrand, Mathias |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC2017) 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery (ISROMAC2017), Dec 2017, Maui, United States |
| Popis: | International audience; The present investigation has been initiated to further increase the understanding of sweep and dihedral effects in turbine cascades and turbines. For that purpose experimental and numerical investigations were performed on either side of a linear turbine cascade with ϕ = ±26.5° true sweep and ν = ±14.5° dihedral (true lean) combining to σ = ±30° axial sweep without tangential lean. The upper sign is for the upstream side of the cascade, and the lower one for the downstream side. An analysis of the results led to the conclusion, that the present cascade flow can be regarded as a superposition of an irrotational 3D primary flow and a rotational secondary flow. A special feature of the flow is, that primary and secondary flow are of opposite direction on the upstream side of the cascade and unidirectional on the downstream side. In addition, considerable sweep and dihedral effects on the blade pressure distributions (loadings) contribute to highly complex 3D flows on both sides of the cascade with different secondary flows and losses. |
| Databáze: | OpenAIRE |
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