Internal-combustion engines – Cooling – Devices for cooling liquid by air flow
Patent
1997-06-27
1999-05-25
Kamen, Noah P.
Internal-combustion engines
Cooling
Devices for cooling liquid by air flow
416169A, 416223R, 416DIG5, F01P 710
Patent
active
059061790
ABSTRACT:
A high efficiency, low solidity, low weight, axial flow fan (100, 200, 300) includes a hub (102, 202, 302), fan blades (104, 204, 304) and a circular band (106, 206, 306). The hub (102, 202, 302) rotates about a rotational axis (110, 210, 310) when torque is applied from a shaft (not shown) rotatably driven by a power source (not shown). The circular band (106, 206, 306) is concentric with the hub (102, 202, 302) and is spaced radially outward from the hub. The blades (104, 204, 304) are distributed circumferentially around the hub (102, 202, 302) and extend radially from the hub to the circular band (106, 206, 306). The blades (104, 204, 304) are configured to produce an airflow when rotated about the rotational axis (110, 210, 310). Each blade (104, 204, 304) has a chord length distribution which varies along the length of the blade, such that the chord length has a local minimum value at a predetermined location between the ends of the blade. The chord length of the blades (104, 204, 304) as a function of blade radius from the rotational axis (110, 210, 310) has an inflection point at a predetermined distance from the hub less than the length of the blade.
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Kamen Noah P.
Siemens Canada Limited
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