Exhaust diffuser

An exhaust diffuser comprising:

• an internal cylinder;
• an external cylinder that forms an exhaust passage between the internal cylinder and the external cylinder, the exhaust passage expanding from front to rear;
• and
• at least one tubular strut that couples the internal cylinder and the external cylinder together, wherein
• the external cylinder includes:
• a front conical portion that is positioned forward of the tubular strut;
• an outer flaring portion that starts flaring at a positon forward of the tubular strut at an inclination angle that is greater than an inclination angle of the front conical portion;
• an outer straight portion that extends rearward from a rear end of the outer flaring portion beyond the maximum width portion of the tubular strut;
• and
• a rear conical portion that expands in diameter from a rear end of the outer straight portion, and
• the internal cylinder includes:
• a front straight portion that faces the front conical portion and the outer flaring portion;
• an inner flaring portion that starts flaring at a position between a maximum width portion and a trailing edge of the tubular strut;
• and
• a rear straight portion that extends rearward from a rear end of the inner flaring portion.

An exhaust diffuser comprising:

• an internal cylinder;
• an external cylinder that forms an exhaust passage between the internal cylinder and the external cylinder, the exhaust passage expanding from front to rear;
• and
• at least one tubular strut that couples the internal cylinder and the external cylinder together, wherein
• the external cylinder includes:
• a front conical portion that is positioned forward of the tubular strut;
• and
• an outer flaring portion that starts flaring at a positon forward of the tubular strut at an inclination angle that is greater than an inclination angle of the front conical portion, and
• the internal cylinder includes:
• a front straight portion that faces the front conical portion and the outer flaring portion;
• and
• an inner flaring portion that starts flaring at a position between a maximum width portion and a trailing edge of the tubular strut, and
• at least one flattened strut that couples the internal cylinder and the external cylinder together and that overlaps with the tubular strut in an axial direction of the exhaust diffuser.

An exhaust diffuser comprising:

• an internal cylinder;
• an external cylinder that forms an exhaust passage between the internal cylinder and the external cylinder, the exhaust passage expanding from front to rear;
• at least one tubular strut that couples the internal cylinder and the external cylinder together;
• and
• at least one flattened strut that couples the internal cylinder and the external cylinder together and that overlaps with the tubular strut in an axial direction of the exhaust diffuser, wherein
• a leading edge of the flattened strut is positioned forward of a leading edge of the tubular strut, and
• a trailing edge of the flattened strut is positioned rearward of a maximum width portion of the tubular strut.