Modeling of laminar-turbulent transition in a turbine rear structure
dc.contributor.author | Augusto Arias, Diego | |
dc.contributor.author | Dev Roy, Shameek | |
dc.contributor.department | Chalmers tekniska högskola / Institutionen för mekanik och maritima vetenskaper | sv |
dc.contributor.examiner | Xisto, Carlos | |
dc.contributor.supervisor | Xisto, Carlos | |
dc.date.accessioned | 2021-08-15T18:44:48Z | |
dc.date.available | 2021-08-15T18:44:48Z | |
dc.date.issued | 2021 | sv |
dc.date.submitted | 2020 | |
dc.description.abstract | The turbine rear structure (TRS) of modern aircraft gas turbine engines have several significant role, one of which is de-swirling the outlet flow coming from the Low Pressure Turbine (LPT) located upstream. Furthermore, the Outlet Guide Vane (OGV) in the TRS provides a structural support between the aft bearing support and main engine case. Other than de-swirling the flow, the TRS-OGV is mechanically and thermally loaded due to the hot outlet gases coming from LPT, which requires the OGV to be designed robustly. The TRS facility in Chalmers University, has a capability of operating over a wide range of Reynolds number, which allows several modes of transition, which in turn affects the aerodynamic and aerothermal performance. This thesis presents a tuned case-specific numerical investigation on the laminar-turbulent transition flow structures in the Turbine Rear Structure- Outlet Guide Vane (TRS OGV). The work includes the processes and results of matching the laminar turbulent transition in the TRS OGV using RANS-CFD with SST k-ω turbulence model and the Langtry-Menter γ-θ transition model. Experimental data for a certain case was used for ambient and boundary conditions for the inlet, outlet, turbulence decay and surface heat transfer. The numerical results obtained, match the experimental verification data considerably well. | sv |
dc.identifier.coursecode | MMSX30 | sv |
dc.identifier.uri | https://hdl.handle.net/20.500.12380/303893 | |
dc.language.iso | eng | sv |
dc.relation.ispartofseries | 2021:51 | sv |
dc.setspec.uppsok | Technology | |
dc.subject | Blade Loading, Boundary Layer, Heat Transfer Coefficient, Momentum Thickness Reynolds Number, Outlet Guide Vane, Swirl Angle, Transition Onset, Turbulent Decay, Turbulent Intensity, y+ | sv |
dc.title | Modeling of laminar-turbulent transition in a turbine rear structure | sv |
dc.type.degree | Examensarbete för masterexamen | sv |
dc.type.uppsok | H |
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