To understand the physics of volcanic ash impact on gas turbine hot-components and develop much-needed tools for engine design and fleet management, the behaviors of volcanic ash in a gas turbine combustor and nozzle guide vanes (NGV) have been numerically investigated. High-fidelity numerical models are generated, and volcanic ash sample, physical, and thermal properties are identified. A simple critical particle viscosity—critical wall temperature model is proposed and implemented in all simulations to account for ash particles bouncing off or sticking on metal walls. The results indicate that due to the particle inertia and combustor geometry, the volcanic ash concentration in the NGV cooling passage generally increases with ash size and density, and is less sensitive to inlet velocity. It can reach three times as high as that at the air inlet for the engine conditions and ash properties investigated. More importantly, a large number of the ash particles entering the NGV cooling chamber are trapped in the cooling flow passage for all four turbine inlet temperature conditions. This may reveal another volcanic ash damage mechanism originated from engine cooling flow passage. Finally, some suggestions are recommended for further research and development in this challenging field. To the best of our knowledge, it is the first study on detailed ash behaviors inside practical gas turbine hot-components in the open literature.
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July 2018
Research-Article
Characteristics of Volcanic Ash in a Gas Turbine Combustor and Nozzle Guide Vanes
Lei-Yong Jiang,
Lei-Yong Jiang
Aerospace—The National Research
Council of Canada,
1200 Montreal Road, M-10,
Ottawa, ON K1A 0R6, Canada
e-mail: lei-yong.jiang@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-10,
Ottawa, ON K1A 0R6, Canada
e-mail: lei-yong.jiang@nrc-cnrc.gc.ca
Search for other works by this author on:
Yinghua Han,
Yinghua Han
Aerospace—The National Research
Council of Canada,
Ottawa, ON K1A 0R6, Canada
e-mail: yinghua.han@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-10
,Ottawa, ON K1A 0R6, Canada
e-mail: yinghua.han@nrc-cnrc.gc.ca
Search for other works by this author on:
Prakash Patnaik
Prakash Patnaik
Aerospace—The National Research
Council of Canada,
Ottawa, ON K1A 0R6, Canada
e-mail: prakash.patnaik@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-17
,Ottawa, ON K1A 0R6, Canada
e-mail: prakash.patnaik@nrc-cnrc.gc.ca
Search for other works by this author on:
Lei-Yong Jiang
Aerospace—The National Research
Council of Canada,
1200 Montreal Road, M-10,
Ottawa, ON K1A 0R6, Canada
e-mail: lei-yong.jiang@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-10,
Ottawa, ON K1A 0R6, Canada
e-mail: lei-yong.jiang@nrc-cnrc.gc.ca
Yinghua Han
Aerospace—The National Research
Council of Canada,
Ottawa, ON K1A 0R6, Canada
e-mail: yinghua.han@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-10
,Ottawa, ON K1A 0R6, Canada
e-mail: yinghua.han@nrc-cnrc.gc.ca
Prakash Patnaik
Aerospace—The National Research
Council of Canada,
Ottawa, ON K1A 0R6, Canada
e-mail: prakash.patnaik@nrc-cnrc.gc.ca
Council of Canada,
1200 Montreal Road, M-17
,Ottawa, ON K1A 0R6, Canada
e-mail: prakash.patnaik@nrc-cnrc.gc.ca
1Corresponding author.
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 3, 2017; final manuscript received September 19, 2017; published online April 11, 2018. Editor: David Wisler.
J. Eng. Gas Turbines Power. Jul 2018, 140(7): 071502 (9 pages)
Published Online: April 11, 2018
Article history
Received:
June 3, 2017
Revised:
September 19, 2017
Citation
Jiang, L., Han, Y., and Patnaik, P. (April 11, 2018). "Characteristics of Volcanic Ash in a Gas Turbine Combustor and Nozzle Guide Vanes." ASME. J. Eng. Gas Turbines Power. July 2018; 140(7): 071502. https://doi.org/10.1115/1.4038523
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