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Keywords: surface roughness
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Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2024, 146(3): 031009.
Paper No: TURBO-23-1225
Published Online: December 4, 2023
...Massimiliano Nardini; Thomas O. Jelly; Melissa Kozul; Richard D. Sandberg; Paul Vitt; Greg Sluyter Turbine blades generally present surface roughness introduced in the manufacturing process or caused by in-service degradation, which can have a significant impact on aero-thermal performance...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2021, 143(7): 071003.
Paper No: TURBO-20-1283
Published Online: April 8, 2021
... have a range of cooling feature sizes and, because of the inherent three-dimensionality, a wide range of build angles. Previous studies have shown that AM built directions influence internal channel surface roughness that, in turn, augment heat transfer and pressure loss. This study investigates...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2010, 132(2): 021004.
Published Online: January 11, 2010
...J. P. Bons The effects of surface roughness on gas turbine performance are reviewed based on publications in the open literature over the past 60 years. Empirical roughness correlations routinely employed for drag and heat transfer estimates are summarized and found wanting. No single correlation...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2009, 131(4): 041020.
Published Online: July 13, 2009
...R. J. Boyle; M. Stripf Turbine vane heat transfer predictions are given for smooth and rough vanes where the experimental data show transition moving forward on the vane as the surface roughness physical height increases. Consistent with smooth vane heat transfer, the transition moves forward...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031016.
Published Online: April 20, 2009
... calculations on both the suction and the pressure side of modern turbine airfoils. Test cases include extensive experimental investigations on a high-pressure turbine vane with varying surface roughness and turbulence intensity, recently published by the current authors as well as new experimental data from...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. July 2009, 131(3): 031017.
Published Online: April 20, 2009
... calculations on both the suction and the pressure side of modern turbine airfoils. Test cases include extensive experimental investigations on a high pressure turbine vane with varying surface roughness and turbulence intensity, recently published by the current authors, as well as new experimental data from...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. January 2009, 131(1): 011010.
Published Online: October 17, 2008
...., increased 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...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2008, 130(4): 041006.
Published Online: July 31, 2008
...N. Sundaram; M. D. Barringer; K. A. Thole Film cooling is influenced by surface roughness and depositions that occur from contaminants present in the hot gas path, whether that film cooling occurs on the vane itself or on the endwalls associated with the vanes. Secondary flows in the endwall region...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2008, 130(2): 021021.
Published Online: March 25, 2008
... , the smooth wall value of Reynolds analogy, for a turbulent boundary layer was 1.2. 08 09 2006 15 11 2006 25 03 2008 convection gas turbines blades surface roughness flow simulation thermal barrier coatings boundary layer turbulence wind tunnels Land-based and aircraft gas...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2008, 130(2): 021003.
Published Online: February 12, 2008
... transition. To predict the onset of transition, a new correlation is presented, accounting for the influence of freestream turbulence and surface roughness. Finally, the new model is tested against transitional rough-wall boundary layer flows on high-pressure and low-pressure turbine airfoils. The proposed...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2007, 129(1): 119–126.
Published Online: January 1, 2007
.... The results of laboratory analysis of the salt deposits are presented, providing insight into the increased surface roughness and the deposit thickness and distribution. The test data show good agreement with published stage characteristics and give valuable information regarding stage-by-stage performance...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 137–143.
Published Online: February 9, 2005
...Yong Il Yun; Il Young Park; Seung Jin Song Turbine blades experience significant surface degradation with service. Previous studies indicate that an order-of-magnitude or greater increase in roughness height is typical, and these elevated levels of surface roughness significantly influence turbine...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Turbomach. January 2005, 127(1): 200–208.
Published Online: February 9, 2005
...M. Stripf; A. Schulz; S. Wittig External heat transfer measurements on a highly loaded turbine vane with varying surface roughness are presented. The investigation comprises nine different roughness configurations and a smooth reference surface. The rough surfaces consist of evenly spaced truncated...