EVALUATION OF ADJOINT OPTIMIZED HOLES - PART I BASELINE PERFORMANCE

Daniel Gutierrez, Christopher Yoon, Michael T. Furgeson, Emma M. Veley, David G. Bogard, Karen A. Thole

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

7 Scopus citations

Abstract

With the advent of the use of additive manufacturing to build gas turbine components, the design space for new hole geometries is essentially unlimited. Recently, a computational adjoint based optimization method was used to design shaped film cooling holes fed by internal co-flow and cross-flow channels. The associated RANS computations predicted that the holes optimized for use with cross-flow (X-AOpt) and co-flow (Co-AOpt) would significantly increase adiabatic effectiveness. However, only the X-AOpt hole was tested experimentally in this previous study. Though the experimentally measured performance for this hole was much less than computationally predicted, it still had a 75% improved performance compared to the conventional 7-7-7 shaped hole. In the current study, the X-AOpt and Co-AOpt shaped holes were experimentally evaluated using measurements of adiabatic effectiveness and overall cooling effectiveness. Coolant was fed to the holes with an internal co-flow channel. For reference, experiments were also conducted with the baseline 7-7-7 shaped hole, and a 15-15-1 shaped hole (shown in a previous study to be the optimum expansion angles for a shaped hole). Furthermore, overall cooling effectiveness measurements were made with engine scale models to evaluate the performance of additively manufactured (AM) X-AOpt and Co-AOpt holes with a realistic metal build. Results from this study confirmed that the X-AOpt hole had a 75% increase in adiabatic effectiveness compared to the 7-7-7 shaped hole. However, the Co-AOpt hole had only a 30% increase in adiabatic effectiveness, substantially less than had been computationally predicted. Measurements of overall cooling effectiveness for the engine-scale models and the large-scale models followed similar trends.

Original languageEnglish (US)
Title of host publicationHeat Transfer - Combustors; Film Cooling
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791886038
DOIs
StatePublished - 2022
EventASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022 - Rotterdam, Netherlands
Duration: Jun 13 2022Jun 17 2022

Publication series

NameProceedings of the ASME Turbo Expo
Volume6-A

Conference

ConferenceASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, GT 2022
Country/TerritoryNetherlands
CityRotterdam
Period6/13/226/17/22

All Science Journal Classification (ASJC) codes

  • General Engineering

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