Due to the high turbine inlet temperatures in modern aircraft engines the adoption of several cooling techniques in the first turbine blade rows is state of the art. For this reason the influence of cooling air ejection on the main flow is in the interest of scientists. In this paper experimental and numerical investigations on the trailing edge cooling air ejection at a stator profile are presented. All measurements are performed at the Straight Cascade Wind tunnel Go¨ttingen. To verify the influence of the cooling air flow on the flow field, the velocity field is measured by Particle Image Velocimetry (PIV). The development of the cooling air concentration is analyzed by utilizing the Quantitative Light Sheet (QLS) technique. For validation purposes the QLS results are compared to CO2 concentration measurements. Both measurement techniques are in good agreement with each other. One of the most important advantages of PIV and QLS is the possibility of combining them at the same test bed due to the identical experimental setup. The experimental investigations are supported by numerical simulations based on the numerical code TRACE. Both the numerical results as well as the experimental results prove the reduction of the trailing edge shock by increasing the coolant mass flow ratio.
Skip Nav Destination
ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition
June 6–10, 2011
Vancouver, British Columbia, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5465-5
PROCEEDINGS PAPER
Experimental Investigations on Cooling Air Ejection at a Straight Turbine Cascade Using PIV and QLS
Oliver Freund,
Oliver Freund
Leibniz Universita¨t Hannover, Hannover, Germany
Search for other works by this author on:
Hans-Juergen Rehder,
Hans-Juergen Rehder
German Aerospace Center, Go¨ttingen, Germany
Search for other works by this author on:
Philipp Schaefer,
Philipp Schaefer
German Aerospace Center, Go¨ttingen, Germany
Search for other works by this author on:
Ingo Roehle
Ingo Roehle
German Aerospace Center, Go¨ttingen, Germany
Search for other works by this author on:
Oliver Freund
Leibniz Universita¨t Hannover, Hannover, Germany
Hans-Juergen Rehder
German Aerospace Center, Go¨ttingen, Germany
Philipp Schaefer
German Aerospace Center, Go¨ttingen, Germany
Ingo Roehle
German Aerospace Center, Go¨ttingen, Germany
Paper No:
GT2011-45296, pp. 147-158; 12 pages
Published Online:
May 3, 2012
Citation
Freund, O, Rehder, H, Schaefer, P, & Roehle, I. "Experimental Investigations on Cooling Air Ejection at a Straight Turbine Cascade Using PIV and QLS." Proceedings of the ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. Volume 5: Heat Transfer, Parts A and B. Vancouver, British Columbia, Canada. June 6–10, 2011. pp. 147-158. ASME. https://doi.org/10.1115/GT2011-45296
Download citation file:
37
Views
Related Proceedings Papers
Related Articles
Film-Cooling Effectiveness on a Rotating Turbine Platform Using Pressure Sensitive Paint Technique
J. Turbomach (October,2010)
Film Cooling Effectiveness Distributions on a Turbine Blade Cascade Platform With Stator-Rotor Purge and Discrete Film Hole Flows
J. Turbomach (July,2008)
Turbine Blade Surface Deterioration by Erosion
J. Turbomach (July,2005)
Related Chapters
Thermodynamic Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Studies Performed
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential