Full Content is available to subscribers

Subscribe/Learn More  >

Turbine Blade Surface Phantom Cooling From Upstream Nozzle Trailing Edge Ejection

[+] Author Affiliations
Shiou-Jiuan Li, Shang-Feng Yang, Je-Chin Han

Texas A&M University, College Station, TX

Luzeng Zhang, Hee-Koo Moon

Solar Turbines Incorporated, San Diego, CA

Paper No. GT2015-42128, pp. V05BT12A003; 14 pages
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5B: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5672-7
  • Copyright © 2015 by ASME


This paper presents upstream nozzle trailing edge coolant ejection on downstream uncooled blades. Pressure sensitive paint (PSP) mass transfer technique provides detailed phantom cooling effectiveness distribution on a modeled land-based turbine rotor blade surfaces. Cavity purge and tip leakage flows are excluded, and a uniform blade inlet temperature is adopted in the current study. Experiments have completed in a low speed wind tunnel facility with a five blade linear cascade. The inlet Reynolds numbers based on chord length are 100,000 and 200,000. Nozzle trailing edge coolant ejection on rotor blade is simulated by a spoked wheel-type rotating facility with 32 hollow rods equipped with coolant ejection from 128 holes per rod. Coolant to mainstream density ratio maintains at 1.5 to match engine conditions. Nozzle coolant discharge velocity to nozzle mainstream velocity ratio varies from 0.4 to 1.4. Velocity ratios from 0.4 to 0.6 are closest to typical engine conditions. Coolant to mainstream mass flow rate ratio (MFR) is from 0.67% to 2.94%. Higher phantom cooling effectiveness occurs on suction and pressure surfaces at the velocity ratio from 0.4 to 0.6 and over 1.0, respectively. Velocity ratio effect impacts on phantom cooling effectiveness distribution more than MFR effect. Most of trailing edge coolant migrates toward blade inner and outer spans than blade mid-span. Further investigation of the trailing edge coolant ejection including cavity purge and tip leakage flows is essential for understanding real applications.

Copyright © 2015 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In