Passive cooling device and method for cooling an auxiliary power

Details Passive cooling device and method for cooling an auxiliary power Passive cooling device and method for cooling an auxiliary power

1995-05-15

1997-08-12

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

60 3908, 244 58, F02C 706, F02C 714

Patent

active

056553595

ABSTRACT:
A passive cooling system for aircraft auxiliary power units having an intake duct extending between an inlet opening and the compartment in which the auxiliary power unit is positioned. An inlet scoop is positioned in the intake duct for diverting a portion of the airflow in the intake duct through an outlet in a wall of the intake duct. A vacuum duct is positioned near an oil cooler for the auxiliary power unit, and an aspirator is operatively positioned between the vacuum duct and an exhaust passage of the auxiliary power unit. The aspirator creates a low-pressure region in the vacuum duct that draws the diverted air out of the outlet and through the oil cooler.

REFERENCES:
patent: 2706255 (1955-04-01), Breaux et al.
patent: 4351150 (1982-09-01), Schulz
patent: 4418879 (1983-12-01), Vanderleest
patent: 4934154 (1990-06-01), Altoz et al.
patent: 4999994 (1991-03-01), Rud et al.
patent: 5265408 (1993-11-01), Scheoran et al.
patent: 5284012 (1994-02-01), Laborie et al.

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