US 12,421,897 B2
Aircraft heat exchanger
Jon Erik Sobanski, Glastonbury, CT (US); and Joseph B. Staubach, Colchester, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by RTX Corporation, Farmington, CT (US)
Filed on Jul. 17, 2023, as Appl. No. 18/222,700.
Claims priority of provisional application 63/389,587, filed on Jul. 15, 2022.
Prior Publication US 2024/0060448 A1, Feb. 22, 2024
Int. Cl. F02C 7/06 (2006.01); F02C 7/14 (2006.01); F28D 1/047 (2006.01); F28F 1/00 (2006.01); F28D 21/00 (2006.01)
CPC F02C 7/06 (2013.01) [F02C 7/14 (2013.01); F28D 1/0477 (2013.01); F28F 1/006 (2013.01); F28D 2021/0026 (2013.01); F28F 2265/26 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A heat exchanger for heat transfer between an external first flow along a first flowpath and a second flow along an internal second flowpath, the heat exchanger comprising:
a first manifold;
a second manifold; and
a plurality of tubes extending from the first manifold to the second manifold and having respective interiors bounding respective legs of the second flowpath, wherein:
the plurality of tubes comprises a plurality of groups of tubes;
for each of the groups of the tubes:
the tubes of the group have first ends mounted to the first manifold at respective first locations; and
the tubes of the group have second ends mounted to the second manifold at respective second locations;
from the first manifold to the second manifold, each tube has:
an upstream concave first turn relative to the first flow;
an upstream convex second turn relative to the first flow; and
an upstream concave third turn relative to the first flow; and
the second locations are offset downstream along the first flowpath from the respective first locations and each tube has no turn other than the first turn, the second turn, and the third turn.