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Purge and Secondary Flow Interaction Control by Means of Platform Circumferential Contouring
| Title: | Purge and Secondary Flow Interaction Control by Means of Platform Circumferential Contouring. |
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| Name(s): |
Seco Soley, Melissa, Author Kapat, Jayanta, Committee Chair Deng, Weiwei, Committee Member Gordon, Ali, Committee Member , Committee Member University of Central Florida, Degree Grantor |
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| Type of Resource: | text | |
| Date Issued: | 2011 | |
| Publisher: | University of Central Florida | |
| Language(s): | English | |
| Abstract/Description: | This study presents an attempt to reduce the losses produced by the purge flow in a turbine stage by incorporating circumferential platform contouring. Two contours are proposed and compared against a baseline at different levels of swirl. The computational simulations were performed using a RANS three-dimensional Computational Fluid Dynamics code with the Shear Stress Transport turbulence model. The results of steady simulations demonstrate that for the first contour, when the flow is swirled to 50% of the rim speed, the purge flow exits the cavity with less cross flow. This in turn reduces the strength of the passage vortex. However, at swirl extremes of 0% and 100% the baseline has the best performance. The results show that a carefully designed platform has the potential to reduce losses when the operating condition is in the proximity of 50% swirl. | |
| Identifier: | CFE0004163 (IID), ucf:49054 (fedora) | |
| Note(s): |
2011-12-01 M.S.M.E. Engineering and Computer Science, Mechanical, Materials and Aerospace Engineering Masters This record was generated from author submitted information. |
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| Subject(s): | purge flow -- secondary flow -- fluid dynamics -- turbine -- high pressure turbine -- cavity -- rim seal -- cooling flows | |
| Persistent Link to This Record: | http://purl.flvc.org/ucf/fd/CFE0004163 | |
| Restrictions on Access: | public 2011-12-15 | |
| Host Institution: | UCF |
