Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades

Ebigenibo Genuine Saturday; Thank-God Isaiah

doi:doi:10.11648/j.eas.20180306.12

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Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades

Ebigenibo Genuine Saturday, Thank-God Isaiah

Published in Engineering and Applied Sciences (Volume 3, Issue 6)

Received: 9 December 2018 Accepted: 25 December 2018 Published: 16 January 2019

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Abstract

This work centres on the investigation of the effects of ambient temperature, shaft power level and compressor degradation (in the form of reduction of health parameter indices including flow capacity index, isentropic efficiency index, and the pressure ratio index) on the creep-fatigue interaction life consumption of the high pressure turbine blades of LM2500+ engine. The aim is to ascertain how the different effects affect engine creep-fatigue interaction life consumption so that engine operators will be properly guided. The Larson-Miller parameter method was used for creep life tracking while the modified universal slopes method was used for the fatigue life analysis. Creep and fatigue damage parameters were obtained at each engine operation point and the linear damage accumulation model was used for the creep-fatigue interaction life analysis. The life analysis models were implemented in PYTHIA, Cranfield university’s in-house gas turbine performance and diagnostics software where an engine model was developed and creep-fatigue interaction life was investigated at different ambient temperatures and shaft power levels. In the compressor degradation, 1% and 2% reduction in the health parameter indices were implanted in the developed engine model and the effects of the degradations were investigated at different shaft power levels and ambient temperatures. It was observed that at a given shaft power level, creep-fatigue life expressed in terms of creep-fatigue factor decreases with increase in ambient temperature while at a given ambient temperature, creep-fatigue life decreases with increase in shaft power. For the degraded engine, the percentage decrease in creep-fatigue factors increases with both shaft power increase and ambient temperature increase. Doubling the compressor health parameter indices reduction nearly doubles the impact on creep-fatigue life consumption. For instance, at 70% power level, the 1% and 2% degradation cases gave percentage reductions in creep-fatigue interaction life as 10.84% and 21.16% respectively while the respective results at 90% power level are 16.05% and 30.10%. The methodologies developed could be applied to other engine types and the results will serve as useful guides to engine operators.

Published in	Engineering and Applied Sciences (Volume 3, Issue 6)
DOI	10.11648/j.eas.20180306.12
Page(s)	145-152
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Creep-Fatigue Interaction, Health Parameter Indices, Flow Capacity Index, Isentropic Efficiency Index, Pressure Ratio Index

References

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[2]	E. G. Saturday and T. Isaiah, “Effects of Compressor Fouling and Compressor Turbine Degradation on Engine Creep Life Consumption,” J. Eng. Gas Turbines Power, vol. 140, no. October, pp. 1–7, 2018.
[3]	E. G. Saturday and T. Isaiah, “Effects of Ambient Temperature and Shaft Power Variations on Creep Life Consumption of Industrial Gas Turbine Blades,” Energy Power Eng., vol. 10, pp. 120–131, 2018.
[4]	M. F. Abdul Ghafir, Y. G. Li, L. Wang, and W. Zhang, “Impact Analysis of Aero-engine Performance Parameter Variation on Hot Section’s Creep Life Using Creep Factor Approach,” AIAA, vol. 16, no. 9, pp. 1–12, 2011.
[5]	M. F. Abdul Ghafir, Y. G. Li, R. Singh, K. Huang, and X. Feng, “Impact of Operating and Health Conditions on Aero Gas Turbine Hot Section Creep Life Using a Creep Factor Approach,” in Proceedings of ASME Turbo Expo 2010: Power for Land, Sea and Air, June 14-16, 2010, pp. 1–13.
[6]	R. Jiang, N. Karpasitis, N. Gao, and P. A. S. Reed, “Effects of Microstructures on Fatigue crack Initiation and Short Crack Propagation at Room Temperature in an Advanced Disc Superalloy,” Mater. Sci. Eng. A, vol. 641, pp. 148–159, 2015.
[7]	L. Rémy, M. Geuffrard, A. Alam, A. Köster, and E. Fleury, “Effects of microstructure in high temperature fatigue : Lifetime to crack initiation of a single crystal superalloy in high temperature low cycle fatigue,” Int J Fatigue, vol. 57, pp. 37–49, 2013.
[8]	S. Mall, H. Kim, E. C. Saladin, and W. J. Porter, “Effects of Microstructure on Fretting Fatigue Behavior of IN100,” Mater. Sci. Eng. A, vol. 527, pp. 1453–1460, 2010.
[9]	S. J. Balsonea, J. M. Larsen, D. C. Maxwellb, and J. W. Jonesc, “Effects of microstructure and temperature on fatigue crack growth in the TiAl alloy Ti-46.5A1-3Nb-2Cr-0.2W,” Mater. Sci. Eng. A, vol. 193, pp. 457–464, 1995.
[10]	R. V. Miner and J. Gayda, “Effects of Processing and Microstructure on the Fatigue Behaviour of the Nickel-base Superalloy Rene 95,” Int J Fatigue, vol. 6, no. 3, pp. 189–193, 1984.
[11]	M. R. Bache, R. E. Johnston, T. S. Cook, B. J. Robinson, and J. F. Matlik, “Crack Growth in the Creep-Fatigue Regime under Constrained Loading of thin Sheet Combustor Alloys,” Int. J. Fatigue, vol. 42, pp. 82–87, 2012.
[12]	P. J. Hurley, M. T. Whittaker, P. Webster, and W. J. Evans, “A Methodology for Predicting Creep/Fatigue Crack Growth Rates in Ti 6246,” Int. J. Fatigue, vol. 29, pp. 1702–1710, 2007.
[13]	V. N. Shlyannikov, A. V Tumanov, and N. V Boychenko, “A Creep Stress Intensity Factor Approach to Creep – Fatigue Crack Growth,” Eng. Fract. Mech., vol. 142, pp. 201–219, 2015.
[14]	J. L. Bouvard, J. L. Chaboche, F. Feyel, and F. Gallerneau, “A Cohesive Zone Model for Fatigue and Creep – Fatigue Crack Growth in Single Crystal Superalloys,” Int. J. Fatigue, vol. 31, no. 5, pp. 868–879, 2009.
[15]	S. Zhu, H. Huang, L. He, Y. Liu, and Z. Wang, “A Generalized Energy-Based Fatigue – Creep Damage Parameter for Life Prediction of Turbine Disk Alloys,” Eng. Fract. Mech., vol. 90, pp. 89–100, 2012.
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APA Style

Ebigenibo Genuine Saturday, Thank-God Isaiah. (2019). Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Engineering and Applied Sciences, 3(6), 145-152. https://doi.org/10.11648/j.eas.20180306.12

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ACS Style

Ebigenibo Genuine Saturday; Thank-God Isaiah. Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Eng. Appl. Sci. 2019, 3(6), 145-152. doi: 10.11648/j.eas.20180306.12

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AMA Style

Ebigenibo Genuine Saturday, Thank-God Isaiah. Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Eng Appl Sci. 2019;3(6):145-152. doi: 10.11648/j.eas.20180306.12

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@article{10.11648/j.eas.20180306.12,
  author = {Ebigenibo Genuine Saturday and Thank-God Isaiah},
  title = {Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades},
  journal = {Engineering and Applied Sciences},
  volume = {3},
  number = {6},
  pages = {145-152},
  doi = {10.11648/j.eas.20180306.12},
  url = {https://doi.org/10.11648/j.eas.20180306.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.eas.20180306.12},
  abstract = {This work centres on the investigation of the effects of ambient temperature, shaft power level and compressor degradation (in the form of reduction of health parameter indices including flow capacity index, isentropic efficiency index, and the pressure ratio index) on the creep-fatigue interaction life consumption of the high pressure turbine blades of LM2500+ engine. The aim is to ascertain how the different effects affect engine creep-fatigue interaction life consumption so that engine operators will be properly guided. The Larson-Miller parameter method was used for creep life tracking while the modified universal slopes method was used for the fatigue life analysis. Creep and fatigue damage parameters were obtained at each engine operation point and the linear damage accumulation model was used for the creep-fatigue interaction life analysis. The life analysis models were implemented in PYTHIA, Cranfield university’s in-house gas turbine performance and diagnostics software where an engine model was developed and creep-fatigue interaction life was investigated at different ambient temperatures and shaft power levels. In the compressor degradation, 1% and 2% reduction in the health parameter indices were implanted in the developed engine model and the effects of the degradations were investigated at different shaft power levels and ambient temperatures. It was observed that at a given shaft power level, creep-fatigue life expressed in terms of creep-fatigue factor decreases with increase in ambient temperature while at a given ambient temperature, creep-fatigue life decreases with increase in shaft power. For the degraded engine, the percentage decrease in creep-fatigue factors increases with both shaft power increase and ambient temperature increase. Doubling the compressor health parameter indices reduction nearly doubles the impact on creep-fatigue life consumption. For instance, at 70% power level, the 1% and 2% degradation cases gave percentage reductions in creep-fatigue interaction life as 10.84% and 21.16% respectively while the respective results at 90% power level are 16.05% and 30.10%. The methodologies developed could be applied to other engine types and the results will serve as useful guides to engine operators.},
 year = {2019}
}

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TY  - JOUR
T1  - Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades
AU  - Ebigenibo Genuine Saturday
AU  - Thank-God Isaiah
Y1  - 2019/01/16
PY  - 2019
N1  - https://doi.org/10.11648/j.eas.20180306.12
DO  - 10.11648/j.eas.20180306.12
T2  - Engineering and Applied Sciences
JF  - Engineering and Applied Sciences
JO  - Engineering and Applied Sciences
SP  - 145
EP  - 152
PB  - Science Publishing Group
SN  - 2575-1468
UR  - https://doi.org/10.11648/j.eas.20180306.12
AB  - This work centres on the investigation of the effects of ambient temperature, shaft power level and compressor degradation (in the form of reduction of health parameter indices including flow capacity index, isentropic efficiency index, and the pressure ratio index) on the creep-fatigue interaction life consumption of the high pressure turbine blades of LM2500+ engine. The aim is to ascertain how the different effects affect engine creep-fatigue interaction life consumption so that engine operators will be properly guided. The Larson-Miller parameter method was used for creep life tracking while the modified universal slopes method was used for the fatigue life analysis. Creep and fatigue damage parameters were obtained at each engine operation point and the linear damage accumulation model was used for the creep-fatigue interaction life analysis. The life analysis models were implemented in PYTHIA, Cranfield university’s in-house gas turbine performance and diagnostics software where an engine model was developed and creep-fatigue interaction life was investigated at different ambient temperatures and shaft power levels. In the compressor degradation, 1% and 2% reduction in the health parameter indices were implanted in the developed engine model and the effects of the degradations were investigated at different shaft power levels and ambient temperatures. It was observed that at a given shaft power level, creep-fatigue life expressed in terms of creep-fatigue factor decreases with increase in ambient temperature while at a given ambient temperature, creep-fatigue life decreases with increase in shaft power. For the degraded engine, the percentage decrease in creep-fatigue factors increases with both shaft power increase and ambient temperature increase. Doubling the compressor health parameter indices reduction nearly doubles the impact on creep-fatigue life consumption. For instance, at 70% power level, the 1% and 2% degradation cases gave percentage reductions in creep-fatigue interaction life as 10.84% and 21.16% respectively while the respective results at 90% power level are 16.05% and 30.10%. The methodologies developed could be applied to other engine types and the results will serve as useful guides to engine operators.
VL  - 3
IS  - 6
ER  -

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Author Information

Ebigenibo Genuine Saturday

Department of Mechanical Engineering, University of Port Harcourt, Port Harcourt, Nigeria
Thank-God Isaiah

Department of Mechanical Engineering, Niger Delta University, Wilberforce Island, Nigeria

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APA Style

Ebigenibo Genuine Saturday, Thank-God Isaiah. (2019). Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Engineering and Applied Sciences, 3(6), 145-152. https://doi.org/10.11648/j.eas.20180306.12

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ACS Style

Ebigenibo Genuine Saturday; Thank-God Isaiah. Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Eng. Appl. Sci. 2019, 3(6), 145-152. doi: 10.11648/j.eas.20180306.12

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AMA Style

Ebigenibo Genuine Saturday, Thank-God Isaiah. Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades. Eng Appl Sci. 2019;3(6):145-152. doi: 10.11648/j.eas.20180306.12

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@article{10.11648/j.eas.20180306.12,
  author = {Ebigenibo Genuine Saturday and Thank-God Isaiah},
  title = {Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades},
  journal = {Engineering and Applied Sciences},
  volume = {3},
  number = {6},
  pages = {145-152},
  doi = {10.11648/j.eas.20180306.12},
  url = {https://doi.org/10.11648/j.eas.20180306.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.eas.20180306.12},
  abstract = {This work centres on the investigation of the effects of ambient temperature, shaft power level and compressor degradation (in the form of reduction of health parameter indices including flow capacity index, isentropic efficiency index, and the pressure ratio index) on the creep-fatigue interaction life consumption of the high pressure turbine blades of LM2500+ engine. The aim is to ascertain how the different effects affect engine creep-fatigue interaction life consumption so that engine operators will be properly guided. The Larson-Miller parameter method was used for creep life tracking while the modified universal slopes method was used for the fatigue life analysis. Creep and fatigue damage parameters were obtained at each engine operation point and the linear damage accumulation model was used for the creep-fatigue interaction life analysis. The life analysis models were implemented in PYTHIA, Cranfield university’s in-house gas turbine performance and diagnostics software where an engine model was developed and creep-fatigue interaction life was investigated at different ambient temperatures and shaft power levels. In the compressor degradation, 1% and 2% reduction in the health parameter indices were implanted in the developed engine model and the effects of the degradations were investigated at different shaft power levels and ambient temperatures. It was observed that at a given shaft power level, creep-fatigue life expressed in terms of creep-fatigue factor decreases with increase in ambient temperature while at a given ambient temperature, creep-fatigue life decreases with increase in shaft power. For the degraded engine, the percentage decrease in creep-fatigue factors increases with both shaft power increase and ambient temperature increase. Doubling the compressor health parameter indices reduction nearly doubles the impact on creep-fatigue life consumption. For instance, at 70% power level, the 1% and 2% degradation cases gave percentage reductions in creep-fatigue interaction life as 10.84% and 21.16% respectively while the respective results at 90% power level are 16.05% and 30.10%. The methodologies developed could be applied to other engine types and the results will serve as useful guides to engine operators.},
 year = {2019}
}

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TY  - JOUR
T1  - Effects of Ambient Temperature and Shaft Power Variations and Compressor Degradation on Creep-Fatigue Interaction Life Consumption of Industrial Gas Turbine Blades
AU  - Ebigenibo Genuine Saturday
AU  - Thank-God Isaiah
Y1  - 2019/01/16
PY  - 2019
N1  - https://doi.org/10.11648/j.eas.20180306.12
DO  - 10.11648/j.eas.20180306.12
T2  - Engineering and Applied Sciences
JF  - Engineering and Applied Sciences
JO  - Engineering and Applied Sciences
SP  - 145
EP  - 152
PB  - Science Publishing Group
SN  - 2575-1468
UR  - https://doi.org/10.11648/j.eas.20180306.12
AB  - This work centres on the investigation of the effects of ambient temperature, shaft power level and compressor degradation (in the form of reduction of health parameter indices including flow capacity index, isentropic efficiency index, and the pressure ratio index) on the creep-fatigue interaction life consumption of the high pressure turbine blades of LM2500+ engine. The aim is to ascertain how the different effects affect engine creep-fatigue interaction life consumption so that engine operators will be properly guided. The Larson-Miller parameter method was used for creep life tracking while the modified universal slopes method was used for the fatigue life analysis. Creep and fatigue damage parameters were obtained at each engine operation point and the linear damage accumulation model was used for the creep-fatigue interaction life analysis. The life analysis models were implemented in PYTHIA, Cranfield university’s in-house gas turbine performance and diagnostics software where an engine model was developed and creep-fatigue interaction life was investigated at different ambient temperatures and shaft power levels. In the compressor degradation, 1% and 2% reduction in the health parameter indices were implanted in the developed engine model and the effects of the degradations were investigated at different shaft power levels and ambient temperatures. It was observed that at a given shaft power level, creep-fatigue life expressed in terms of creep-fatigue factor decreases with increase in ambient temperature while at a given ambient temperature, creep-fatigue life decreases with increase in shaft power. For the degraded engine, the percentage decrease in creep-fatigue factors increases with both shaft power increase and ambient temperature increase. Doubling the compressor health parameter indices reduction nearly doubles the impact on creep-fatigue life consumption. For instance, at 70% power level, the 1% and 2% degradation cases gave percentage reductions in creep-fatigue interaction life as 10.84% and 21.16% respectively while the respective results at 90% power level are 16.05% and 30.10%. The methodologies developed could be applied to other engine types and the results will serve as useful guides to engine operators.
VL  - 3
IS  - 6
ER  -

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