Cooling unit for improving flow uniformity of cooling channel and regenerative cooling combustion chamber

The invention provides a cooling unit for improving the flow uniformity of a cooling channel and a regenerative cooling combustion chamber, and mainly solves the technical problems of non-uniform cooling of the wall surface of the combustion chamber and poor thermal protection effect caused by non-uniform flow distribution of coolants in upstream and downstream cooling channels of a wall surface mounting interface of the regenerative cooling combustion chamber. The cooling unit comprises a shell, a mounting interface which is vertical to the axis of the shell and is arranged on the shell, and a plurality of equal-height ribs which are uniformly arranged on the outer wall surface of the shell along the axial direction, wherein a cooling channel is formed between every two adjacent ribs; the central rib is divided into a first central rib and a second central rib by the mounting interface, the second central rib is connected with the outer wall surface of the mounting interface through an arc-shaped rib, and a