Impact of dust feed on capture efficiency and deposition patterns in a double-walled liner

Trevor M. Cory, Karen A. Thole, Kathryn L. Kirsch, Ryan Lundgreen, Robin Prenter, Stephen Kramer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The introduction of particulates into gas turbine engines poses a serious threat to component durability. Particles drawn from the environment, such as ash or sand, can be introduced into the air system used to cool hot section components and drastically diminish cooling performance. In the current study, a dirt-laden coolant stream impinged on a double-walled cooling configuration, which was comprised of an impingement plate followed by an effusion-cooled plate. Experiments were conducted at both room temperature and at temperatures in excess of 750°C; flow conditions were varied to achieve different pressure ratios across the cooling configuration. Dirt particles were introduced into the coolant using two different methods: in discrete bursts, called slugs; or in a continuous feed ensuring a constant stream of particles. This continuous feed mechanism is at the crux of a new test facility created to introduce flexibility and precision in the control of dirt feed rates, particularly for very small (<50 mg) amounts of dirt. The difference in capture efficiency and in dirt patterns between the two feed methods showed measurably different dirt accumulation levels on the cold side of the effusion plate at the same test conditions. Results show that the slug feed method caused higher capture efficiency and thicker dirt deposition on the effusion plate compared to the continuous feed.

Original languageEnglish (US)
Title of host publicationTurbomachinery
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791858585
DOIs
StatePublished - Jan 1 2019
EventASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019 - Phoenix, United States
Duration: Jun 17 2019Jun 21 2019

Publication series

NameProceedings of the ASME Turbo Expo
Volume2D-2019

Conference

ConferenceASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition, GT 2019
CountryUnited States
CityPhoenix
Period6/17/196/21/19

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Cory, T. M., Thole, K. A., Kirsch, K. L., Lundgreen, R., Prenter, R., & Kramer, S. (2019). Impact of dust feed on capture efficiency and deposition patterns in a double-walled liner. In Turbomachinery (Proceedings of the ASME Turbo Expo; Vol. 2D-2019). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2019-90981