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Time-Resolved Analysis of Film Cooling Effects Under Pulsating Inflow Conditions
Citation key 2022_heinrich_springerafcc
Author Heinrich, A. and Herbig, M. and Peitsch, D.
Title of Book Active Flow and Combustion Control 2021
Pages 153–168
Year 2022
ISBN 978-3-030-90727-3
ISSN 1612-2909
DOI 10.1007/978-3-030-90727-3_10
Location Switzerland
Address Cham
Volume 152
Note Paper Contributed to the Conference “Active Flow and Combustion Control 2021”, September 28–29, 2021, Berlin, Germany

Technische Universität Berlin:
A. Heinrich, M. Herbig, D. Peitsch
Editor King, Rudibert and Peitsch, Dieter
Publisher Springer International Publishing
Series Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Abstract The development of modern gas turbines requires higher turbine inlet temperatures for an increase in thermal efficiency. With a change to a pressure gain combustion concept to increase the efficiency significantly, more challenges for the cooling of the first turbine stages must be overcome. For this purpose an array of 777 fan-shaped cooling holes on a flat plate are exposed to a series of different pulsating inflow conditions. Varying the amplitude up to 100% to the mean differential pressure, the film cooling performance is analyzed and evaluated. Adjusting the pulsating frequencies from 1 Hz–5 Hz further allows to gain a comprehensive understanding of the influence of the main parameters affecting the cooling film development. The experimental data recorded with an infrared thermography system reveals a strong impact of the pulsating inflow conditions on the adiabatic film cooling effectiveness.
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