Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Vane or deflector
Patent
1994-09-08
1996-09-10
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Vane or deflector
415181, 415191, 415193, 4152112, 416223A, 416243, 416DIG2, F01D 904
Patent
active
055540007
ABSTRACT:
An axial flow compressor for use in a gas turbine or other industrial application having an improved efficiency is provided through modification of the blade shape and profile of the blades subject to a subsonic high velocity inlet flow so as to avoid shock losses in the blade rows, and improve the total efficiency. The curvature distribution on the suction surface of the stator blade rows or rotor blade rows of the axial flow compressor is adapted to have a local minimum in a region toward the leading edge of the blade, and then a local maximum. Thereby, an excessive increment in velocity on the suction surface from the leading edge to the position of the maximum velocity can be suppressed, and the occurrence of a shock wave can be avoided so as to minimize pressure loss in the blade rows, thus increasing the total efficiency of the axial compressor.
REFERENCES:
patent: 2953295 (1960-09-01), Stalker
patent: 3333817 (1967-08-01), Rhomberg
patent: 4408957 (1983-10-01), Kurzrock et al.
"Reduction of End-Wall Effects in a Small, Low-Aspect-Ratio Turbine By Radial Work Redistribution", by J. C. Schlegel et al., Transactions of the ASME, Jan., 1976, pp. 130-137.
"NASA, SP-36 (Aerodynamic Design Of Axial-Flow Compressors)", 1965, pp. 151-254.
Japan Society Of Mechanical Engineers, 343rd Conference (1971), "Pumps and Blowers: Theories and Applications", pp. 37-52.
Y. Kashiwabara et al, "Developments Leading to an Axial Flow Compressor for a 25 MW Class High Efficiency Gas Turbine", pp. 1-9, published by The American Society of Mechanical Engineers (presented at the Gas Turbine and Aeroengine Congress and Exposition, Jun. 11-14, 1990, Brussels, Belgium).
Katoh Yasuhiro
Sasada Tetsuo
Toriya Hajime
Tsuda Yoshihiro
Yanagida Mitsuaki
Hitachi , Ltd.
Look Edward K.
Verdier Christopher
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