Diffuser pipe for an aircraft propulsion system

A diffuser pipe for an aircraft propulsion system, the diffuser pipe comprising:

• a pipe body, the pipe body extends between and to an inlet end and an outlet end, the pipe body includes a suction lateral wall, a pressure lateral wall, and opposing side walls, the opposing side walls extend between and connect the suction lateral wall and the pressure lateral wall, the pipe body further includes an inlet body portion and a transition body portion, the inlet body portion and the transition body portion form a fluid passage, the fluid passage extends through the pipe body from a passage inlet at the inlet end to a passage outlet at the outlet end, the fluid passage has a cross-sectional area,
• the inlet body portion extends between and to the inlet end and the transition body portion, and the cross-sectional area monotonically increases in the inlet body portion in the direction from the passage inlet to the passage outlet,
• the transition body portion extends between and to the inlet body portion and the outlet end, the transition body portion forms a turn of the pipe body, the suction lateral wall forms an inner wall of the turn, and the pressure lateral wall forms an outer wall of the turn, the transition body portion includes a diverging sub-portion and a converging sub-portion, the cross-sectional area monotonically increases in the diverging sub-portion in a direction from the passage inlet to the passage outlet, the cross-sectional area monotonically decreases in the converging sub-portion in the direction from the passage inlet to the passage outlet.

A compressor diffuser for an aircraft propulsion system, the compressor diffuser comprising:

• a plurality of diffuser pipes disposed circumferentially about an axis of the compressor diffuser, each diffuser pipe of the plurality of diffuser pipes includes a pipe body, the pipe body extends between and to an inlet end and an outlet end, the pipe body includes a suction lateral wall, a pressure lateral wall, and opposing side walls, the opposing side walls extend between and connect the suction lateral wall and the pressure lateral wall, the pipe body further includes a transition body portion,
• the suction lateral wall, the pressure lateral wall, and the opposing side walls extend between and to the inlet end and the outlet end to form a fluid passage, the fluid passage extends along a center position from a passage inlet at the inlet end to a passage outlet at the outlet end, the fluid passage has a cross-sectional area,
• the transition body portion is disposed at the outlet end, the transition body portion includes a diverging sub-portion and a converging sub-portion, the cross-sectional area monotonically increases in the diverging sub-portion in a direction from the passage inlet to the passage outlet, and the cross-sectional area monotonically decreases in the converging sub-portion in the direction from the passage inlet to the passage outlet, and
• the diverging sub-portion extends between and to the outlet end and the converging sub-portion.