US 12,135,036 B2
Centerbody insertion for improved CAC motor cooling
Zhongtao Dai, West Hartford, CT (US); Ram Ranjan, West Hartford, CT (US); and Kathryn L. Kirsch, East Haddam, CT (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 5, 2022, as Appl. No. 18/075,159.
Prior Publication US 2024/0183359 A1, Jun. 6, 2024
Int. Cl. B64D 13/06 (2006.01); F04D 25/08 (2006.01); F04D 29/32 (2006.01); F04D 29/58 (2006.01)
CPC F04D 25/082 (2013.01) [F04D 29/321 (2013.01); F04D 29/5806 (2013.01); B64D 2013/0618 (2013.01); B64D 2013/0644 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A ram air fan inlet assembly for cabin air compressor (CAC) motor cooling flow enhancement, the ram air fan inlet assembly comprising:
a gas path defined by a ram air duct and a fan section, the fan section immediately downstream and abutting the ram air duct, wherein the ram air duct and the fan section share a common axis;
a CAC motor cooling return duct having an outlet in the ram air duct, wherein the outlet is an opening in a wall of the ram air duct and the opening opens directly to the ram air duct; and
a stationary centerbody disposed in the ram air duct about the common axis and configured to reduce a volume of the gas flow path in the ram air duct, wherein the centerbody and the outlet axially overlap.