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Build Direction Effects on Additively Manufactured Channels

[+] Author Affiliations
Jacob C. Snyder, Curtis K. Stimpson, Karen A. Thole

The Pennsylvania State University, University Park, PA

Dominic Mongillo

Pratt and Whitney, East Hartford, CT

Paper No. GT2015-43935, pp. V05AT11A034; 10 pages
doi:10.1115/GT2015-43935
From:
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5A: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5671-0
  • Copyright © 2015 by ASME

abstract

With the advances of Direct Metal Laser Sintering (DMLS), also generically referred to as additive manufacturing, novel geometric features of internal channels for gas turbine cooling can be achieved beyond those features using traditional manufacturing techniques. There are many variables, however, in the DMLS process that affect the final quality of the part. Of most interest to gas turbine heat transfer designers are the roughness levels and tolerance levels that can be held for the internal channels. This study investigates the effect of DMLS build direction and channel shape on the pressure loss and heat transfer measurements of small scale channels. Results indicate that differences in pressure loss occur between the test cases with differing channel shapes and build directions, while little change is measured in heat transfer performance.

Copyright © 2015 by ASME

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