Snedden, Glen CDunn, Dwain IIngram, GGregory-Smith, D2010-12-102010-12-102010-06Snedden, GC, Dunn, D, Ingram, G and Gregory-Smith, D. 2010. Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions. ASME Turbo Expo 2010: Power for Land, Sea and Air. Glasgow, 14-18 June 2010, pp 12http://hdl.handle.net/10204/4651ASME Turbo Expo 2010: Power for Land, Sea and Air. Glasgow, 14-18 June 2010The application of non-axisymmetric end walls in turbine stages has gained wide spread acceptance as a means to improve the performance of turbines in both power generation and aero-derivative applications. Non-axisymmetric end walls are aimed at the control of secondary flows and to a large extent have been developed through the use of computational fluid dynamics and detailed measurements in linear and annular cascades and proven in full scale engine tests. Little or no literature is available describing their performance at conditions other than design. This study utilises 5-hole probe measurements in a low speed, model turbine in conjunction with computational fluid dynamics to gain a more detailed understanding of the influence of a generic end wall design on the structure of secondary flows at both on and off-design flow conditions. Results indicate a 0.4% improvement in rotor efficiency at design but this was reduced at off design and at higher loading the rotor efficiency was reduced by 0.5%. Stage efficiencies were improved for all conditions but with a declining trend as load was increased. Experimental and CFD results are examined to investigate these findings further.enNon-axisymmetric end walGeneric non-axisymmetricRotating turbinesASME Turbo Expo 2010Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditionsConference PresentationSnedden, G. C., Dunn, D. I., Ingram, G., & Gregory-Smith, D. (2010). Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions. 2010 by ASME. http://hdl.handle.net/10204/4651Snedden, Glen C, Dwain I Dunn, G Ingram, and D Gregory-Smith. "Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions." (2010): http://hdl.handle.net/10204/4651Snedden GC, Dunn DI, Ingram G, Gregory-Smith D, Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions; 2010 by ASME; 2010. http://hdl.handle.net/10204/4651 .TY - Conference Presentation AU - Snedden, Glen C AU - Dunn, Dwain I AU - Ingram, G AU - Gregory-Smith, D AB - The application of non-axisymmetric end walls in turbine stages has gained wide spread acceptance as a means to improve the performance of turbines in both power generation and aero-derivative applications. Non-axisymmetric end walls are aimed at the control of secondary flows and to a large extent have been developed through the use of computational fluid dynamics and detailed measurements in linear and annular cascades and proven in full scale engine tests. Little or no literature is available describing their performance at conditions other than design. This study utilises 5-hole probe measurements in a low speed, model turbine in conjunction with computational fluid dynamics to gain a more detailed understanding of the influence of a generic end wall design on the structure of secondary flows at both on and off-design flow conditions. Results indicate a 0.4% improvement in rotor efficiency at design but this was reduced at off design and at higher loading the rotor efficiency was reduced by 0.5%. Stage efficiencies were improved for all conditions but with a declining trend as load was increased. Experimental and CFD results are examined to investigate these findings further. DA - 2010-06 DB - ResearchSpace DP - CSIR KW - Non-axisymmetric end wal KW - Generic non-axisymmetric KW - Rotating turbines KW - ASME Turbo Expo 2010 LK - https://researchspace.csir.co.za PY - 2010 T1 - Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions TI - Performance of a generic non-axisymmetric end wall in a single stage, rotating turbine at on and off-design conditions UR - http://hdl.handle.net/10204/4651 ER -