A regenerative cooling channel with a truss structure

Abstract

The application discloses a regenerative cooling channel with a truss structure, which includes an outer wall, a truss structure and a cooling channel; a cavity is provided between the outer wall and the cooling channel, and the truss structure is arranged in the cavity. The truss structure includes a hollow frame structure constructed by a plurality of support rods. The truss structure includes a plurality of interconnected basic units, and the basic unit is a support body constructed by a plurality of support rods; in the longitudinal and transverse directions, any two adjacent basic units share one side. The basic unit is a quadrangular pyramid composed of four triangles and one square. The invention utilizes the truss structure to construct an air-like interlayer on the basis of the traditional regenerative cooling structure, utilizes the low thermal conductivity of the air to isolate a large amount of heat, avoids excessive temperature of the outer wall of the combustion chamber, and effectively reduces the structural weight of the combustion chamber wall while ensuring the structural strength .

Description

technical field [0001] The present application relates to the technical field of ramjet combustion chambers, in particular to a regenerative cooling channel with a truss structure. Background technique [0002] Hypersonic vehicles propelled by ramjet engines have been a hot research and development issue in the aerospace field in recent years. Due to the extremely high aerodynamic and thermal loads brought about by the high flight Mach number and the extremely high temperature generated by the combustion of hydrocarbon fuel propellants, it exceeds the existing materials. One of the keys to designing a hypersonic vehicle is to solve the thermal protection problem of the vehicle, especially the cooling problem of the ramjet combustion chamber. Conventional turbine-based engines use cooling methods such as impact and air film, while the stagnation temperature of ramjet engines is extremely high, so it is difficult to use conventional air cooling methods and use regenerative coo...

AI Technical Summary

Problems solved by technology

This structure mainly has the following disadvantages: on the one hand, due to the risk of fuel coking, the flow channel in the traditional regenerative cooling structure should not be too flat, the space utilization rate in the direction of wall thickness is not good, and there is still a lot of room for weight reduction; on the other hand, in Metal materials with higher thermal conductivity in the thickness direction account for a larger proportion, resulting in a smaller equivalent thermal resistance in this direction, and the thermal insulation capacity needs to be improved

Images