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Proceedings Papers

100-Hour Test of an Inside-Out Ceramic Turbine Rotor at Operating Conditions

P. K. Dubois, B. Picard, A. Gauvin-Verville, P. Méthot, A. Landry-Blais, L.-P. Jean, S. Richard, J.-S. Plante, M. Picard
Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T18A002, June 13–17, 2022
Paper No: GT2022-79194
DOI: https://doi.org/10.1115/GT2022-79194
... Abstract Converting sub-MW turbine rotor blades to ceramics is not a trivial endeavour, but the promise of a substantial increase in turbine inlet temperature (TIT), and therefore cycle efficiency and power density, could mean wide use in upcoming, distributed power, turboelectric aircraft...
View Paper titled, 100-Hour Test of an Inside-Out <span class="search-highlight">Ceramic</span> Turbine Rotor at Operating Conditions
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Topics: Ceramics, Rotors, Turbines
Proceedings Papers

Determination of the Area of Rational Use of Hybrid Bearings With Steel Rings and Ceramic Rolling Elements in High-Speed Aircraft Engines

Yury Lavrentyev, Nikolay Petrov, Yury Nozhnitsky
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A018, June 7–11, 2021
Paper No: GT2021-59872
DOI: https://doi.org/10.1115/GT2021-59872
... is the rotational speed (rpm). Under these conditions, significant heat is generated in the bearings, and the use of hybrid rolling bearings with steel rings and ceramic rolling elements looks more attractive due to the ceramic’s low density and low coefficient of thermal expansion. A computational method...
View Paper titled, Determination of the Area of Rational Use of Hybrid Bearings With Steel Rings and <span class="search-highlight">Ceramic</span> Rolling Elements in High-Speed Aircraft Engines
Click here to open pdf in another window PDF for Determination of the Area of Rational Use of Hybrid Bearings With Steel Rings and <span class="search-highlight">Ceramic</span> Rolling Elements in High-Speed Aircraft Engines
Topics: Aircraft engines, Bearings, Ceramics, Heat, Steel
Proceedings Papers

Effects of Target Size on Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Steel Ball Projectiles

Sung R. Choi, Zsolt Ra´cz
Proc. ASME. GT2011, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Wind Turbine Technology, 517-527, June 6–10, 2011
Paper No: GT2011-46831
DOI: https://doi.org/10.1115/GT2011-46831
... in SN282 than in AS800 silicon nitride. The critical impact velocity where targets fractured catastrophically decreased with decreasing target size and was lower in SN282 than in AS800. Overall, FOD by steel projectiles was significantly less than that by silicon-nitride ceramic counterparts, due to much...
View Paper titled, Effects of Target Size on Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Steel Ball Projectiles
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Topics: Damage, Gas turbines, Projectiles, Silicon, Steel
Proceedings Papers

Target Size Effects on Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Ceramic Ball Projectiles

Sung R. Choi, Zsolt Ra´cz
Proc. ASME. GT2010, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy, 493-502, June 14–18, 2010
Paper No: GT2010-23574
DOI: https://doi.org/10.1115/GT2010-23574
... from an impact velocity of 50 m/s. A backside cracking analysis based on the elastic foundation approach was made as a function of target thickness. Overall, FOD by ceramic projectiles was significantly greater than that by hardened metallic counterparts. foreign object damage (FOD) impact...
View Paper titled, Target Size Effects on Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by <span class="search-highlight">Ceramic</span> Ball Projectiles
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Topics: Ceramics, Damage, Gas turbines, Projectiles, Silicon
Proceedings Papers

Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Silicon Nitride Ball Projectiles

Sung R. Choi
Proc. ASME. GT2009, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors, 241-248, June 8–12, 2009
Paper No: GT2009-59031
DOI: https://doi.org/10.1115/GT2009-59031
... Proceedings of ASME Turbo Expo 2009 Power for Land, Sea, ad Air -TU BA R. C d, P * Email addres model. [Keywords: f impact test; si INTRODUCT Cera susceptible to subjected to ceramic comp when the kine limits. The aeroengines in or small fore Assessments of FOD in AS800 silicon nitride were also...
View Paper titled, Foreign Object Damage in Gas-Turbine Grade Silicon Nitrides by Silicon Nitride Ball Projectiles
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Topics: Damage, Gas turbines, Projectiles, Silicon, Silicon nitride ceramics
Proceedings Papers

Confidence Intervals for Weibull Fast-Fracture Parameters

Mandar Chati, Curtis Johnson, Ahmet Kaya, Bjoern Schenk
Proc. ASME. GT2002, Volume 4: Turbo Expo 2002, Parts A and B, 47-58, June 3–6, 2002
Paper No: GT2002-30501
DOI: https://doi.org/10.1115/GT2002-30501
... 05 02 2009 Practical limits on number of specimens that can be tested lead to uncertainty in the estimated Weibull parameters. This paper presents an evaluation of four techniques for estimating confidence intervals for size-scaled Weibull parameters of monolithic ceramics...
View Paper titled, Confidence Intervals for Weibull Fast-Fracture Parameters
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Topics: Approximation, Ceramics, Failure mechanisms, Fracture (Materials), Fracture (Process), Probability, ASTM International, Fracture toughness, Simulation, Uncertainty
Proceedings Papers

A Novel Technique for Estimation of Critical Frontal Process Zone Size in Ceramics

Seong-Min Choi, Masato Okamoto, Hideo Awaji
Proc. ASME. GT2002, Volume 4: Turbo Expo 2002, Parts A and B, 103-107, June 3–6, 2002
Paper No: GT2002-30508
DOI: https://doi.org/10.1115/GT2002-30508
... Proceedings of ASME Turbo Expo 2002 M a toughness, because ceramic materials intrinsically have ionic and/or covalen structural ceram to be extremel (FPZ) or damag composed of which have be [1-3]. In the past proposed to im toughening tec particle-dispers and (C) phase- several geomet whisker...
View Paper titled, A Novel Technique for Estimation of Critical Frontal Process Zone Size in <span class="search-highlight">Ceramics</span>
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Topics: Ceramics