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Keywords: surface roughness
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Proceedings Papers

Proc. ASME. GT2021, Volume 2B: Turbomachinery — Axial Flow Turbine Aerodynamics; Deposition, Erosion, Fouling, and Icing, V02BT32A006, June 7–11, 2021
Paper No: GT2021-59192
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59192 INFLUENCE OF SURFACE ROUGHNESS ON THE FLAT-PLATE BOUNDARY LAYER TRANSITION UNDER A HIGH-LIFT AIRFOIL PRESSURE GRADIENT AND LOW FREESTREAM TURBULENCE Heechan...
Proceedings Papers

Proc. ASME. GT2021, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V007T17A015, June 7–11, 2021
Paper No: GT2021-59755
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59755 Dependence of LPBF surface roughness on laser incidence angle and component build orientation Ramesh Subramanian David Rule Onur Nazik Siemens Energy Siemens...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A019, September 21–25, 2020
Paper No: GT2020-14525
...NUMERICAL EVALUATION OF SURFACE ROUGHNESS EFFECTS ON FILM-COOLING PERFORMANCE IN A LAIDBACK FAN-SHAPED HOLE Ali Zamiri1, Sung Jin You1, Jin Taek Chung1, 1School of Mechanical Engineering, Korea University, Seoul, Republic of Korea ABSTRACT This study numerically investigates the influences...
Proceedings Papers

Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T18A007, September 21–25, 2020
Paper No: GT2020-14842
... size reductions and rough surfaces. In this paper, dimensional metrology of cross-sectional views of multi-row microchannels made by additive manufacturing was conducted by a scanning electron microscope at different locations along the printing direction. Channel size reduction, surface roughness...
Proceedings Papers

Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T20A031, September 21–25, 2020
Paper No: GT2020-16336
...Abstract Abstract Surface roughness significantly affects the aerodynamics and heat transfer within micro-scale turbine stages. It results in a considerable increment in the blade profile loss and leads consequently to sizeable performance reductions. The provision of low roughness surfaces...
Proceedings Papers

Proc. ASME. GT2019, Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy, V009T48A006, June 17–21, 2019
Paper No: GT2019-91044
... of Engineering Cairo 11517, Egypt. ABSTRACT Dust may be challenging to the blades of wind turbines deployed in the harsh environment of the Sahara. In this paper, the airfoil sections of a wind turbine have been customized for low sensitivity to surface roughness at the wind conditions prevailing in Hurghada...
Proceedings Papers

Proc. ASME. GT2019, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Honors and Awards, V001T25A003, June 17–21, 2019
Paper No: GT2019-90784
...THE RESEARCH ON COMPRESSOR PERFORMANCE DEGRADATION CAUSED BY SURFACE ROUGHNESS ENLARGEMENT DUE TO CORROSION IN MARINE ENVIRONMENTS HaiOu-Sun College of Power and Energy Engineering, Harbin Engineering University, Harbin, China, haiousun888@126.com Jingyuan-Ma College of Power and Energy Engineering...
Proceedings Papers

Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 789-797, May 14–17, 2007
Paper No: GT2007-28003
... surface roughness and near hole obstructions. Experiments were conducted on the suction side of a scaled-up simulated turbine vane. Results from the study indicated that as much as 50% degradation occurred with upstream obstructions, but downstream obstructions actually enhanced film cooling effectiveness...
Proceedings Papers

Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 799-809, May 14–17, 2007
Paper No: GT2007-28004
..., length, height, and position in relation to a film cooling hole. In addition to this, the level of overall surface roughness also must be considered. An investigation was conducted on obstruction characteristics for a single row of holes on the suction side of a simulated turbine vane. It was found...
Proceedings Papers

Proc. ASME. GT2004, Volume 4: Turbo Expo 2004, 105-118, June 14–17, 2004
Paper No: GT2004-53668
... 25 11 2008 This paper presents experimental results documenting the combined effects of surface roughness and free-stream turbulence level on boundary-layer transition. The experiments were conducted on a flat surface, upon which a pressure distribution similar to those prevailing...
Proceedings Papers

Proc. ASME. GT2004, Volume 4: Turbo Expo 2004, 93-104, June 14–17, 2004
Paper No: GT2004-53667
... 25 11 2008 This paper documents the effects of surface roughness on boundary layer transition in separation-bubbles under low free-stream turbulence conditions (<1%). The experiments were performed on a flat surface, upon which a pressure distribution similar to those prevailing...
Proceedings Papers

Proc. ASME. GT2005, Volume 3: Turbo Expo 2005, Parts A and B, 1039-1047, June 6–9, 2005
Paper No: GT2005-68664
... in the separated shear layer is achieved through adjustment of the streamwise pressure distribution. The results provide examples for the extent of interaction between viscous and inviscid stability mechanisms. separation-bubble transition surface roughness February 21, 2005 12:23 Proceedings of Turbo...
Proceedings Papers

Proc. ASME. GT2006, Volume 6: Turbomachinery, Parts A and B, 1069-1076, May 8–11, 2006
Paper No: GT2006-90499
... 15 09 2008 To discuss the impact of the surface roughness on the efficiency of shrouded centrifugal compressor impellers, this paper presents a theoretical examination of different parameters influencing their aerodynamic behavior. The work is based on the available literature about...