Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Axial flow runner
Patent
1995-02-15
1996-02-06
Look, Edward K.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Axial flow runner
416189, 4152083, F04D 2966
Patent
active
054891868
ABSTRACT:
Stationary flow control vanes positioned to encounter and redirect recirculating airflow provide a surprising combination of efficiency, low noise, and manufacturability for shrouded, banded, axial fans that are positioned in a housing. Such fan and housing combinations reduce swirl in recirculating airflow, so that the airflow entering the fan (which includes the recirculating airflow) is more ordered and fan performance is improved. The invention is particularly suited for fans that draw airflow through an upstream heat exchanger. It can also be applied to fans that blow air through a downstream heat exchanger. The invention is also suited for ducted fans.
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A. R. Azimian et al., "Application of Recess Vanced Casing Treatment to Axial Flow Fans," Journal of Turbomachinery, Jan., 1990, vol. 112, pp. 145-150.
M. Ziabasharhagh et al., "Recess Vane Passive Stall Control," Presented at the International Gas Turbine and Aeroengine Congress and Exposition, Cologne, Germany, Jun. 1-4, 1992, pp. 1-10.
Hickey Robert I.
Houten Robert V.
Yapp Martin G.
Airflow Research and Manufacturing Corp.
Look Edward K.
Sgantzos Mark
LandOfFree
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