TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE
Turbulence measurements are made in a novel gas tur- bine rig facility recently used to study combustor-turbine in- Teractions in jet engines [1]. The rig is capable of numer- ous area traverses surrounding engine turbine nozzle guide vanes (NGVs). The rig is unique in that complete engine hardware...
| Main Authors: | , , , , |
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| Format: | Conference item |
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2012
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| _version_ | 1826277534614945792 |
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| author | Cha, C Ireland, P Denman, P Savarianandam, V ASME |
| author_facet | Cha, C Ireland, P Denman, P Savarianandam, V ASME |
| author_sort | Cha, C |
| collection | OXFORD |
| description | Turbulence measurements are made in a novel gas tur- bine rig facility recently used to study combustor-turbine in- Teractions in jet engines [1]. The rig is capable of numer- ous area traverses surrounding engine turbine nozzle guide vanes (NGVs). The rig is unique in that complete engine hardware of the annular combustion subsystem is used to simulate the upstream flow entering the turbine. The rig operates at cold, near-atmospheric conditions. The tur- bulence measurements include both the turbulence intensi- Ties and lengthscales and span an area over a single com- bustor sector. Axial measurement planes include locations both upstream and downstream of the real engine hardware NGVs. The upstream plane corresponds to a conventional combustor-turbine interface plane. In [1], pressure, ve- locity, and passive scalar mixing measurements were pre- sented along with RANS CFD predictions. Here, in addi- Tion to the newly measured turbulence quantities, large-eddy simulations (LES) are performed for the complete, coupled combustor-turbine system. Good agreement between rig data and CFD is seen at the combustor-turbine interface, with LES yielding improved predictions over RANS. For the flow through the NGV pas- sages, vortex visualizations of the simulated flow fields show significant differences to the classic, commonly accepted pic- Ture of Langston [2] and others [3]. The difference is at- Tributed to the high turbulence levels created by the combus- Tor. The impact of the limitations of the combustor-turbine rig on these findings is discussed. Copyright © 2012 by ASME. |
| first_indexed | 2024-03-06T23:30:21Z |
| format | Conference item |
| id | oxford-uuid:6bd0f599-6450-4224-b820-079e070c66c6 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T23:30:21Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:6bd0f599-6450-4224-b820-079e070c66c62022-03-26T19:06:40ZTURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACEConference itemhttp://purl.org/coar/resource_type/c_5794uuid:6bd0f599-6450-4224-b820-079e070c66c6Symplectic Elements at Oxford2012Cha, CIreland, PDenman, PSavarianandam, VASMETurbulence measurements are made in a novel gas tur- bine rig facility recently used to study combustor-turbine in- Teractions in jet engines [1]. The rig is capable of numer- ous area traverses surrounding engine turbine nozzle guide vanes (NGVs). The rig is unique in that complete engine hardware of the annular combustion subsystem is used to simulate the upstream flow entering the turbine. The rig operates at cold, near-atmospheric conditions. The tur- bulence measurements include both the turbulence intensi- Ties and lengthscales and span an area over a single com- bustor sector. Axial measurement planes include locations both upstream and downstream of the real engine hardware NGVs. The upstream plane corresponds to a conventional combustor-turbine interface plane. In [1], pressure, ve- locity, and passive scalar mixing measurements were pre- sented along with RANS CFD predictions. Here, in addi- Tion to the newly measured turbulence quantities, large-eddy simulations (LES) are performed for the complete, coupled combustor-turbine system. Good agreement between rig data and CFD is seen at the combustor-turbine interface, with LES yielding improved predictions over RANS. For the flow through the NGV pas- sages, vortex visualizations of the simulated flow fields show significant differences to the classic, commonly accepted pic- Ture of Langston [2] and others [3]. The difference is at- Tributed to the high turbulence levels created by the combus- Tor. The impact of the limitations of the combustor-turbine rig on these findings is discussed. Copyright © 2012 by ASME. |
| spellingShingle | Cha, C Ireland, P Denman, P Savarianandam, V ASME TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title | TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title_full | TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title_fullStr | TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title_full_unstemmed | TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title_short | TURBULENCE LEVELS ARE HIGH AT THE COMBUSTOR-TURBINE INTERFACE |
| title_sort | turbulence levels are high at the combustor turbine interface |
| work_keys_str_mv | AT chac turbulencelevelsarehighatthecombustorturbineinterface AT irelandp turbulencelevelsarehighatthecombustorturbineinterface AT denmanp turbulencelevelsarehighatthecombustorturbineinterface AT savarianandamv turbulencelevelsarehighatthecombustorturbineinterface AT asme turbulencelevelsarehighatthecombustorturbineinterface |