Cooling mechanism of combustion chamber, rocket engine having cooling mechanism, and method of manufacturing cooling mechanism

Patent metadata

Field	Value
Publication number	US-10787998-B2
Application number	US-201615556461-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Mar 10, 2015
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A cooling mechanism includes a bottom wall (22) in contact with a combustion chamber, an upper wall (30), and a cooling passage (40) arranged between the bottom wall (22) and the upper wall (30). The cooling passage (40) includes a first passage (50) extending to a first direction, a second passage (60) extending to the first direction, and a connection section (70) connected with the first passage (50) and the second passage (60). The second passage (60) is arranged to have an offset to the first passage (50) in a second direction perpendicular to the first direction and along the bottom wall (22).

First claim

The invention claimed is:

1. A cooling mechanism of a combustion chamber comprising:
a bottom wall in contact with the combustion chamber;
an upper wall; and
a cooling passage arranged between the bottom wall and the upper wall, wherein the cooling passage comprises:
a first passage arranged along the bottom wall to extend to a first direction;
a second passage arranged along the bottom wall to extend to the first direction; and
a first connection section connected with the first passage and the second passage,
wherein a longitudinal center axis of the first passage and a longitudinal center axis of the second passage are separated from each other in a second direction perpendicular to the first direction and extending along the bottom wall,
wherein the second passage is connected with a part of the first connection section in the first direction,
wherein the first passage is connected with a part of the first connection section in a direction opposite to the first direction,
wherein a first collision wall is arranged in an end of the first connection section in the first direction such that a part of cooling medium which flows through the first connection section to the first direction collides with the first collision wall,
wherein the first collision wall has a surface apart from the bottom wall as proceeding to the first direction,
wherein a part of the first passage and a part of the second passage lie on a line that passes along the first direction, and the first passage and second passage overlap when viewed in the first direction,
wherein the first passage is surrounded by the bottom wall, the upper wall, a first side wall, and a second side wall when viewed in the first direction,
wherein the second passage is surrounded by the bottom wall, the upper wall, a third side wall, and a fourth side wall when viewed in the first direction, and
wherein the first connection section is surrounded by the bottom wall, the upper wall, the first side wall, and the third side wall when viewed in the first direction.

2. The cooling mechanism of the combustion chamber according to claim 1 , wherein a distance between a longitudinal center axis of the first passage and a longitudinal center axis of the second passage is smaller than a width of the first passage in the second direction.

3. The cooling mechanism of the combustion chamber according to claim 2 , wherein a second collision wall that collides with a part of the cooling medium which flows through the first connection section to the direction opposite to the first direction is arranged on an end of the first connection section in the direction opposite to the first direction,
and wherein the second collision wall has a surface becoming near the bottom wall as heading to the first direction.

4. The cooling mechanism of the combustion chamber according to claim 3 ,
wherein the first collision wall is connected with the upper wall and the bottom wall,
and wherein a cross section of the first collision wall perpendicular to the second direction has a curved shape.

5. The cooling mechanism of the combustion chamber according to claim 2 ,
wherein the first collision wall is connected with the upper wall and the bottom wall,
and wherein a cross section of the first collision wall perpendicular to the second direction has a curved shape.

6. The cooling mechanism of the combustion chamber according to claim 1 , wherein a second collision wall that collides with a part of the cooling medium which flows through the first connection section to the direction opposite to the first direction is arranged on an end of the first connection section in the direction opposite to the first direction, and
wherein the second collision wall has a surface becoming near the bottom wall as heading to the first direction.

7. The cooling mechanism of the combustion chamber according to claim 6 , wherein the second collision wall is connected with the upper wall and the bottom wall,
and wherein a cross section of the second collision wall perpendicular to the second direction has a curved shape.

8. The cooling mechanism of the combustion chamber according to claim 6 , wherein a lower end of the second collision wall is positioned in the first direction, compared with a lower end of the first collision wall.

9. The cooling mechanism of the combustion chamber according to claim 6 , wherein an area of cross section of the first passage perpendicular to the first direction is equal to an area of cross section of the first connection section perpendicular to the first direction, and
wherein an area of cross section of the second passage perpendicular to the first direction is equal to an area of cross section of the first connection section perpendicular to the first direction.

10. The cooling mechanism of the combustion chamber according to claim 1 ,
wherein the first collision wall is connected with the upper wall and the bottom wall,
and wherein a cross section of the first collision wall perpendicular to the second direction has a curved shape.

11. The cooling mechanism of the combustion chamber according to claim 1 , wherein the cooling passage comprises:
a third passage arranged along the bottom wall to extend to the first direction; and
a second connection section connected with the second passage and the third passage,
wherein a longitudinal center axis of the second passage and a longitudinal center axis of the third passage are separated from each other in the second direction,
wherein the third passage is connected with a part of the second connection section in the first direction, and
wherein the second passage is connected with a part of the second connection section in the direction opposite to the first direction.

12. A cooling mechanism of a combustion chamber comprising:
a bottom wall in contact with the combustion chamber;
an upper wall; and
a cooling passage arranged between the bottom wall and the upper wall, wherein the cooling passage comprises:
a first passage arranged along the bottom wall to extend to a first direction;
a second passage arranged along the bottom wall to extend to the first direction; and
a first connection section connected with the first passage and the second passage,
wherein a longitudinal center axis of the first passage and a longitudinal center axis of the second passage are separated from each other in a second direction perpendicular to the first direction and extending along the bottom wall,
wherein the second passage is connected with a part of the first connection section in the first direction,
wherein the first passage is connected with a part of the first connection section in a direction opposite to the first direction,
wherein the cooling passage further comprises:
a third passage arranged along the bottom wall to extend to the first direction;
a fourth passage arranged along the bottom wall to extend to the first direction; and
a second connection section connected with the third passage and the fourth passage,
wherein a longitudinal center axis of the fourth passage and a longitudinal center axis of the third passage are separated from each other in the second direction,
wherein the fourth passage is connected with a part of the second connection section in the first direction,
wherein the third passage is connected with a part of the second connection section in the direction opposite to the first direction,
wherein the first passage and the third passage are arranged to be adjacent to each other,
wherein the second passage and the fourth passage are arranged to be adjacent to each other,
wherein a position of the second connecti

Assignees

• Mitsubishi Heavy Ind Ltd
• Japan Aerospace Exploration

Inventors

• Watanabe Daiki
• Adachi Masaki
• Kobayashi Hiroyuki
• KUROSU Akihide
• Kawashima Hideto
• NEGORO Nobuki

Classifications

• F02K9/64 Primary

  having cooling arrangements · CPC title

• F01D5/18

  Hollow blades, {i.e. blades with cooling or heating channels or cavities (structure of hollow blades in general F01D5/147)}; Heating, heat-insulating or cooling means on blades · CPC title

• F23R2900/03045

  Convection cooled combustion chamber walls provided with turbolators or means for creating turbulences to increase cooling · CPC title

• F02K9/972

  Fluid cooling arrangements for nozzles (F02K9/64 takes precedence) · CPC title

• F05D2260/2212

  by creating turbulence · CPC title