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Keywords: secondary flows
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Proceedings Papers

Proc. ASME. GT2021, Volume 2B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V02BT32A012, June 7–11, 2021
Paper No: GT2021-59701
... allows for high turbine the circulation level calculated from axial planes underpredicted the true circulation by up to 50%. entry temperatures, which are essential to produce high cycle efficiency. Purge air is bled from the compressor and Keywords: Axial Turbine, Secondary Flows, Purge, reintroduced...
Proceedings Papers

Proc. ASME. GT2021, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Wind Energy; Scholar Lecture, V001T01A016, June 7–11, 2021
Paper No: GT2021-59992
... on the system thermal appear that need to be analyzed for both the oil and the fuel management is analyzed. system at steady-state and transient operating modes. The effects, which relate to the cold temperature, associated with Keywords: oil system, secondary flows, heat transfer, fuel freeze or wax point...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A041, September 21–25, 2020
Paper No: GT2020-15076
... cooling flows injected upstream of the passage. The first part of this study describes in detail, the passage aerodynamics as affected by injection of cooling flows. It reveals a system of secondary flows, including the newly-discovered Impingement Vortex , which redefines our understanding...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A055, September 21–25, 2020
Paper No: GT2020-15581
..., the suction surface remains largely unchanged. endwall cooling vane surface cooling secondary flows impingement vortex NOZZLE PASSAGE ENDWALL EFFECTIVENESS VALUES WITH VARIOUS COMBUSTOR COOLANT FLOW RATES: PART 2 ENDWALL AND VICINITY SURFACE EFFECTIVENESS MEASUREMENTS Kedar P. Nawathe1, Rui Zhu2...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A060, September 21–25, 2020
Paper No: GT2020-15746
...Abstract Abstract Modern gas turbines are subjected to very high thermal loading. This leads to a need for aggressive cooling to protect components from damage. Endwalls are particularly challenging to cool due to a complex system of secondary flows near them that wash and disrupt...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A056, September 21–25, 2020
Paper No: GT2020-15583
... unaffected by changes in coolant flow rates except in the endwall-vane surfaces region where the combustor coolant flow rate dominates changes in coolant transport. This is shown to have a high impact on endwall and vane surface cooling. endwall cooling vane surface cooling secondary flows...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A063, September 21–25, 2020
Paper No: GT2020-15926
...Abstract Abstract The first stage turbine of a modern gas turbine is subjected to high thermal loads which lead to a need for aggressive cooling schemes to protect its components from melting. Endwalls are particularly challenging to cool due to the complex system of secondary flows near them...
Proceedings Papers

Proc. ASME. GT2020, Volume 2D: Turbomachinery, V02DT36A021, September 21–25, 2020
Paper No: GT2020-16065
...A NUMERICAL INVESTIGATION INTO SECONDARY FLOWS AT THE INLET TO A LOW- PRESSURE COMPRESSOR TRANSITION DUCT Dimitra Tsakmakidou1, A Duncan Walker1, Chris Hall2 1Department of Aeronautical and Automotive Engineering, Loughborough University, Loughborough, UK. (a.d.walker@lboro.ac.uk) 2Rolls-Royce plc...
Proceedings Papers

Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 247-256, June 16–19, 2003
Paper No: GT2003-38369
... Secondary flows in the cooling jets are the main reason for the degradation of the cooling performance of a film-cooled blade. The formation of kidney vortices can significantly be reduced for shaped holes instead of cylindrical holes. For the determination of the film cooling heat transfer...
Proceedings Papers

Proc. ASME. GT2004, Volume 5: Turbo Expo 2004, Parts A and B, 1429-1437, June 14–17, 2004
Paper No: GT2004-54083
... The paper presents the results of an extensive measurement program addressed to investigate the influence of a large number of parameters on the development of secondary flows downstream of linear turbine cascades. Tests have been performed on linear cascades manufactured in order to obtain...
Proceedings Papers

Proc. ASME. GT2005, Volume 3: Turbo Expo 2005, Parts A and B, 345-357, June 6–9, 2005
Paper No: GT2005-68340
... and reducing the strength of secondary flows within the passage. Reduction in secondary flows leads to less mixing in the endwall region. This allows improved cooling of the endwall and airfoil surfaces with injected and leakage flows. The present paper documents component misalignment and leakage flow effects...