US 11,698,004 B2
Aircraft propulsion assembly comprising air-liquid heat exchangers
Sébastien Oriol, Moissy-Cramayel (FR); Mohammed-Lamine Boutaleb, Moissy-Cramayel (FR); and Vincent Jean-François Peyron, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR); and SAFRAN NACELLES, Gonfreville-l'Orcher (FR)
Appl. No. 16/607,053
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR); and SAFRAN NACELLES, Gonfreville-L'Orcher (FR)
PCT Filed Apr. 12, 2018, PCT No. PCT/EP2018/059478
§ 371(c)(1), (2) Date Oct. 21, 2019,
PCT Pub. No. WO2018/197232, PCT Pub. Date Nov. 1, 2018.
Claims priority of application No. 1753539 (FR), filed on Apr. 24, 2017.
Prior Publication US 2020/0049028 A1, Feb. 13, 2020
Int. Cl. F02C 7/14 (2006.01); F01D 25/14 (2006.01); B64D 29/00 (2006.01); F02C 7/18 (2006.01)
CPC F01D 25/14 (2013.01) [B64D 29/00 (2013.01); F02C 7/18 (2013.01); F02C 7/14 (2013.01); F05D 2260/213 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A propulsion assembly for aircraft, comprising a turbomachine surrounded by a fan nacelle comprising an annular air intake lip extending around the turbomachine by two annular walls, inner and outer, respectively, configured to be swept across by air flows at least when the aircraft is in flight, wherein:
said inner wall comprising or supporting at least one inner network of pipes and said outer wall comprising or supporting at least one outer network of pipes, the at least one inner network of pipes and the at least one outer network of pipes being configured to transport a liquid in contact with said inner wall or said outer wall to form air-liquid heat exchangers respectively inner and outer, the pipes of each inner or outer heat exchanger being connected in parallel with each other,
one of the inner networks of pipes having at least one liquid outlet connected in series with at least one liquid intake of one of the outer networks of pipes, and
the propulsion assembly comprises means for circulating the liquid, connected fluidly to at least one liquid intake of at least one of the inner networks of pipes for its liquid supply, and connected to at least one liquid outlet of at least one of the outer networks of pipes for the recovery of the liquid,
wherein the pipes of the or each inner networks are fluidly supplied in parallel by a respective first inner collector or a respective feed ramp of the means for circulating the liquid arranged in an annular space of the fan nacelle defined between the inner wall and the outer wall of the fan nacelle,
wherein said inner wall comprises or supports a plurality of the inner networks of pipes and said outer wall comprises or supports a plurality of the outer networks of pipes, wherein each inner network of pipes is fluidly connected in series to a respective outer network of pipes such that at least one liquid outlet of each inner network of pipes is fluidly connected to at least one liquid intake of the respective outer network of pipes, and wherein for all inner networks at least one liquid intake of each inner networks is fluidly supplied in parallel by the respective first inner collector or the respective feed ramp and for all outer networks at least one liquid outlet of each outer network is fluidly connected in parallel to a respective first outer collector or respective collection ramp of the means for circulating the liquid.