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Experimental and Numerical Investigations of the NEKOMIMI Film Cooling Technology

[+] Author Affiliations
Karsten Kusterer, Nurettin Tekin

B&B-AGEMA GmbH, Aachen, Germany

Dieter Bohn

RWTH Aachen University, Aachen, Germany

Takao Sugimoto, Ryozo Tanaka, Masahide Kazari

Kawasaki Heavy Industries, Ltd., Akashi, Japan

Paper No. GT2012-68400, pp. 1299-1310; 12 pages
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 4: Heat Transfer, Parts A and B
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4470-0
  • Copyright © 2012 by ASME


The improvement of the thermal efficiency of modern gas turbines can be achieved by reducing the required cooling air amount. Therefore, it is necessary to increase the cooling effectiveness, so that the available cooling air fulfils the cooling task even if the amount has been reduced. Due to experimental and numerical efforts, it is well understood today that aerodynamic mixing processes are enhanced by counter rotating vortices (CRV) in the cooling jets and lead to jet liftoff effects. Novel film cooling technologies focus on establishing anti-counter-rotating-vortices (ACRV) inside the cooling jet that prevent the hot gas from flowing underneath the jet and, thus, avoid the lift-off effect. One of these technologies is the NEKOMIMI film cooling, which is derived from the original double-jet film cooling (DJFC).

Copyright © 2012 by ASME
Topics: Film cooling



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