Using a tracer gas to quantify sealing effectiveness for engine realistic rim seals

Kenneth Clark, Michael Barringer, Karen Thole, Carey Clum, Paul Hiester, Curtis Memory, Christopher Robak

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

7 Scopus citations

Abstract

As overall pressure ratios increase in gas turbine engines, both the main gas path and cooling temperatures increase leading to component durability concerns. At the same time effective use of the secondary air for both cooling and sealing becomes increasingly important in terms of engine efficiency. To fully optimize these competing requirements, experiments at engine-relevant conditions are required to validate new designs and computational tools. A test turbine has been commissioned in the Steady Thermal Aero Research Turbine (START) lab. The test turbine was designed to be a 1.5 stage turbine operating under continuous flow simulating engine-relevant conditions including Reynolds and Mach numbers with hardware true to engine scale. The first phase of research conducted using the test turbine, which was configured for a half-stage (vane only), was to study hot gas ingestion through turbine rim seals. This paper presents a series of facility benchmarks as well as validation experiments conducted to study ingestion using a tracer gas to quantify the performance of rim seals and purge flows. Sensitivity studies included concentration levels and sampling flow rates in flow regimes that ranged from stagnant to compressible depending upon the area of interest. The sensitivity studies included a range of purge and leakage flow conditions for several locations in the rim seal and cavity areas. Results indicate reasonable sampling methods were used to achieve isokinetic sampling conditions.

Original languageEnglish (US)
Title of host publicationHeat Transfer
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791849781
DOIs
StatePublished - Jan 1 2016
EventASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 - Seoul, Korea, Republic of
Duration: Jun 13 2016Jun 17 2016

Publication series

NameProceedings of the ASME Turbo Expo
Volume5A-2016

Other

OtherASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
CountryKorea, Republic of
CitySeoul
Period6/13/166/17/16

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'Using a tracer gas to quantify sealing effectiveness for engine realistic rim seals'. Together they form a unique fingerprint.

  • Cite this

    Clark, K., Barringer, M., Thole, K., Clum, C., Hiester, P., Memory, C., & Robak, C. (2016). Using a tracer gas to quantify sealing effectiveness for engine realistic rim seals. In Heat Transfer (Proceedings of the ASME Turbo Expo; Vol. 5A-2016). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/GT2016-58095