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Keywords: discharge coefficient
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Proceedings Papers

Proc. ASME. GT2024, Volume 8: Heat Transfer: Internal Air Systems; Heat Transfer: Internal Cooling; Industrial and Cogeneration, V008T15A029, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128679
... methods. The findings showed that the hole spacing, film hole inclination angle, and the number of pin fins have a significant impact on the discharge coefficient in double wall cooling. Furthermore, the internal crossflow severely affects the flow through the film cooling holes, resulting in a noticeable...
Proceedings Papers

Proc. ASME. GT2024, Volume 8: Heat Transfer: Internal Air Systems; Heat Transfer: Internal Cooling; Industrial and Cogeneration, V008T15A004, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-122229
... holes has negligible effect on the target wall heat transfer. Furthermore, the overall discharge coefficient, considering both the impingement hole and the film hole, remains comparable for the three schemes studied. The reverse impingement film cooling decreases the discharge coefficient of the film...
Proceedings Papers

Proc. ASME. GT2021, Volume 5B: Heat Transfer — General Interest; Internal Air Systems; Internal Cooling, V05BT14A016, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-60189
... cavity the cooling air to the turbine blades. The static axial nozzles Discharge coefficient of receiver hole swirl the cooling air in the direction of rotation of the turbine Specific heat at constant pressure disk, thereby reducing the relative total temperature of the air. Non-dimensional mass flow...
Proceedings Papers

Proc. ASME. GT2020, Volume 7C: Heat Transfer, V07CT14A020, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15296
... Abstract Orifices, especially rotating orifices, are an important flow element of the secondary air system in a modern aero-engine, and their discharge coefficient depends on the geometry, the operating point and the surrounding environment. The influence of Reynolds number, pressure ratio...
Proceedings Papers

Proc. ASME. GT2020, Volume 4A: Combustion, Fuels, and Emissions, V04AT04A029, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14567
... Abstract At present, researches on the discharge coefficient of the combustion chamber cooling holes are mostly based on the experimental study of the porous plates considering various geometric structures under different flow conditions. In this method, the average discharge coefficients...
Proceedings Papers

Proc. ASME. GT2019, Volume 5A: Heat Transfer, V05AT11A011, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-91084
... between improved heat transfer and reduced flow resistance. impingement cooling heat transfer rib discharge coefficient NUMERICAL STUDY ON THE FLOW AND HEAT TRANSFER CHARACTERISTICS WITH DIFFERENT RIB STRUCTURES PLACED ON THE IMPINGEMENT PLATE Yong-feng Ding Hui-ren Zhu Qiang Gao School...
Proceedings Papers

Proc. ASME. GT2012, Volume 4: Heat Transfer, Parts A and B, 1899-1912, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68209
... Rotating and stationary orifices are used within the secondary air system to transport sealing/ cooling air to its consumers. This paper reports on measurements of the discharge coefficient of rotating radial holes as their aerodynamical behaviour is different from the one of axial or stationary...
Proceedings Papers

Proc. ASME. GT2010, Volume 4: Heat Transfer, Parts A and B, 1051-1060, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22691
... 11 01 2011 In modern multi shaft gas turbine engines the cooling air taken from the compressor passes through various stationary or rotating holes or orifices to the turbine stage. The discharge coefficient of rotating orifices may vary considerably depending on the operating point...
Proceedings Papers

Proc. ASME. GT2010, Volume 4: Heat Transfer, Parts A and B, 1897-1907, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23732
... perform better than cylindrical-shaped holes for low and mid-range blowing ratios, but not at higher levels. film cooling conical-shaped hole computational fluid dynamic Reynolds Averaged Navier Stokes cooling uniformity coefficient discharge coefficient 1 Copyright © 2010 by ASME...
Proceedings Papers

Proc. ASME. GT2008, Volume 4: Heat Transfer, Parts A and B, 1599-1612, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50976
.... The influence of different geometric features is incorporated into a model for the calculation of discharge coefficients. Cross-flow discharge coefficient rotating orifice secondary air system SM NT C AL ü e A hu In an effort to provide usable further insight into flows Reax Axial Reynolds number...
Proceedings Papers

Proc. ASME. GT2004, Volume 3: Turbo Expo 2004, 393-400, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53376
... 25 11 2008 Experimental investigations on discharge coefficient (Cd) of a row of plunged dilution holes of a reverse-flow gas turbine combustor were carried out using water as the working fluid. Studies were carried in a wide range of inlet Re (0.5 × 10 4 – 1.65 × 10 4...
Proceedings Papers

Proc. ASME. GT2004, Volume 4: Turbo Expo 2004, 307-320, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53237
... be found in many classes of high speed machinery such as industrial compressors and high speed electrical machinery. The objective of the work was to enhance the understanding of the flows in such geometries and reliably establish discharge coefficients which can be used for air system design purposes...
Proceedings Papers

Proc. ASME. GT2005, Volume 1: Turbo Expo 2005, 201-211, June 6–9, 2005
Publisher: American Society of Mechanical Engineers
Paper No: GT2005-68904
... 03 11 2008 The aim of this study is to determine the discharge coefficient of a multiperforated wall sample designed by AVIO, and more precisely to show the influence of each surrounding flow (inside holes, coolant and main flows). Results obtained are compared to correlations from...