Large size efficient regenerative cooling nozzle

Abstract

The invention discloses a large-size efficient regenerative cooling spray pipe and relates to the technical fields of aerospace, civil use and combustion. The large-size efficient regenerative coolingspray pipe comprises an inlet collector, a spray pipe upper segment, a connecting ring, a spray pipe lower segment and an outlet collector. The spray pipe upper segment is of a hollow arc-shaped conical structure. The inlet collector is fixedly mounted at the narrow-opening end of the spray pipe upper segment. The spray pipe lower segment is of a hollow arc-shaped conical structure. The narrow-opening end of the spray pipe lower segment is in butt joint with the wide-opening end of the spray pipe upper segment in the axial direction. The outlet collector is fixedly mounted at the wide-openingend of the spray pipe lower segment. The connecting ring is fixedly mounted between the spray pipe upper segment and the spray pipe lower segment. An external medium sequentially flows through a medium inlet, a first inner chamber, radial flow equalizing holes, a second inner chamber, secondary flow equalizing holes and a gap formed between a spray pipe upper segment outer wall and a spray pipe upper segment inner wall and finally flows out of the outlet collector. By means of the large-size efficient regenerative cooling spray pipe, the regenerative cooling capacity matched with the area ofthe spray pipe is increased; technological processability is improved; and the problems that the technological production difficult is high, and a pipe cannot be mounted onto or dismounted from an upstream structure easily are solved.

Description

technical field [0001] The invention relates to the fields of aerospace, civil and combustion technologies, in particular to a large-size high-efficiency regenerative cooling nozzle. Background technique [0002] Regenerative cooling nozzle devices are widely used in aerospace, civil and combustion technology fields. The existing regenerative cooling nozzle device has a relatively small area ratio and a low cooling working pressure, so the structure is relatively simple, and the inner wall and the outer wall are mostly integral structures, and the inner and outer walls are mostly made of the same metal. In addition, the nozzle extension section and the upstream device are mostly welded structures, and once welded to the upstream, they cannot be disassembled. For the nozzle extension section with a large area ratio, if the same connection method is used, it will make later inspection and related work more difficult. Contents of the invention [0003] The purpose of the pre...

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