(19)
(11) EP 0 321 379 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.07.1991 Bulletin 1991/28

(43) Date of publication A2:
21.06.1989 Bulletin 1989/25

(21) Application number: 88630118.3

(22) Date of filing: 30.06.1988
(51) International Patent Classification (IPC)4: F15D 1/00, F01N 3/28
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 15.12.1987 US 132395

(71) Applicant: UNITED TECHNOLOGIES CORPORATION
Hartford, CT 06101 (US)

(72) Inventors:
  • Presz, Walter Michael, Jr.
    Wilbraham Massachusetts 01905 (US)
  • Paterson, Robert William
    Simsbruy Connecticut 06070 (US)
  • Werle, Michael Joseph
    West Hartford Connecticut 06117 (US)
  • Ealba, Robert Herman
    Grosse Pointe Farms Michigan 48236 (US)

(74) Representative: Weydert, Robert et al
Dennemeyer & Associates Sàrl P.O. Box 1502
L-1015 Luxembourg
L-1015 Luxembourg (LU)


(56) References cited: : 
   
       


    (54) Convoluted plate with vortex generator


    (57) A thin, convoluted wall member (314) disposed upstream of the inlet (312) of a diffuser (304) generates large-scale vortices (322) having axes in the downstream direction. The vortices (322) enhance mixing within the diffuser (304) and can also energize the boundary layer, thereby improving diffuser performance and delaying the onset of stall. Greater diffusion angles without stall are possible. The member (314) itself creates low losses.







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