Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Axially extending shroud ring or casing
Patent
1995-09-14
1997-09-16
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Axially extending shroud ring or casing
416203, F01D 522
Patent
active
056673612
ABSTRACT:
An array (32) of flow directing elements such as fan blades (20) for a turbine engine (10) is disclosed. Each blade in the array has a set of circumferentially shrouds (42, 44) whose contact edges (46, 48) abut each other during engine operation. A shroud angle .sigma. establishes the running chord angle .alpha. of the airfoil (30) portion of the array. Slight differences in the shroud angles of adjacent blades cause corresponding differences in the running chord angles so that the array is detuned and airfoil flutter is precluded.
REFERENCES:
patent: 1893184 (1933-01-01), Smellie
patent: 3216699 (1965-11-01), Schoenborn
patent: 3477795 (1969-11-01), Beesley
patent: 3536417 (1970-10-01), Stiefel et al.
patent: 3837761 (1974-09-01), Brown
patent: 4253800 (1981-03-01), Segawa et al.
patent: 4474534 (1984-10-01), Thode
patent: 4538963 (1985-09-01), Sugio et al.
patent: 4798519 (1989-01-01), Zipps et al.
patent: 4863351 (1989-09-01), Fischer et al.
patent: 5000660 (1991-03-01), Van Houten et al.
patent: 5156529 (1992-10-01), Ferleger et al.
patent: 5160242 (1992-11-01), Brown
patent: 5266007 (1993-11-01), Bushnell et al.
patent: 5286168 (1994-02-01), Smith
patent: 5299914 (1994-04-01), Schilling
patent: 5306119 (1994-04-01), Bandoh et al.
patent: 5498136 (1996-03-01), Namura et al.
Flutter of Turbofan Rotors with Mistuned Blades, Krishna Rao V. Kaza and Robert E. Kielb, AIAA Journal, Nov., 1984, vol. 22, No. 11, pp. 1618-1625.
Aerodynamic Detuning Analysis of an Unstalled Supersonic Turbofan Cascade, D. Hoyniak and S. Fleeter, Journal of Engineering for Gas Turbines and Power, Jan. 1986, vol. 108, pp. 60-67.
Duke Douglas E.
Greene, Jr. William Henry
Sunamoto James A.
Yaeger Karl J.
Baran Kenneth C.
Lee Michael S.
Look Edward K.
United Technologies Corporation
LandOfFree
Flutter resistant blades, vanes and arrays thereof for a turboma does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flutter resistant blades, vanes and arrays thereof for a turboma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flutter resistant blades, vanes and arrays thereof for a turboma will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-213857