Housing with recirculation control for use with banded axial-flo

Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Axial flow runner

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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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