(19)
(11) EP 0 278 434 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.01.1990 Bulletin 1990/05

(43) Date of publication A2:
17.08.1988 Bulletin 1988/33

(21) Application number: 88101712.3

(22) Date of filing: 05.02.1988
(51) International Patent Classification (IPC)4: F01D 5/20, F01D 5/18, F01D 11/10, F01D 5/14
(84) Designated Contracting States:
CH DE FR GB IT LI SE

(30) Priority: 06.02.1987 US 11788

(71) Applicant: Weinhold, Wolfgang P.
D-97084 Würzburg (DE)

(72) Inventor:
  • Weinhold, Wolfgang P.
    D-97084 Würzburg (DE)

(74) Representative: Petra, Elke, Dipl.-Ing. et al
Will & Petra Rechts- und Patentanwälte Neue Poststrasse 21
85598 Baldham
85598 Baldham (DE)


(56) References cited: : 
   
       


    (54) A blade, especially a rotor blade


    (57) A rotor blade (10) particularly adapted for turbine engines comprises various injection holes (30, 40A, 40B, 50A, 50B, 60A, 60B) on the blade tip (18) and near the blade tip (18) and on the root plane (44) and near the root plane (44) so directed as to reduce the tip leakage flow crossing the tip and to control the boundary layer by means of fluid curtain and entrainment effects.







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