High-frequency pulse injection device

Abstract

The invention provides a high-frequency pulse injection device and relates to the technical field of stamping type engines. The front end of a cylinder body is provided with a through hole, and the cylinder body is of a compound structure as a whole and is composed of a rectification barrel and a rectification sleeve in a wedged and sleeved manner; a piston rod is of a hollow pillar-shaped structure, the upper end of the piston rod is welded to a piston, and the bottom end of the piston rod is sealed; the position, close to the bottom end closed position, of the piston rod is provided with an oil injection hole communicating with the pillar-shaped hollow portion, and the oil injection hole is provided with a threaded transition connector; the piston is of a blind hole structure with a cavity, the cavity communicates with the pillar-shaped hollow portion, a groove in the middle of the piston is an injection hole slot, and the injection hole slot is internally provided with first injection through holes communicating with the cavity; the outer side of the rectification barrel is symmetrically provided with two columns of positioning platforms with rectangular cross sections; and second injection through holes in the inner wall of the rectification barrel communicate with second rectification slots of the rectification sleeve, the second rectification slots of the rectification sleeve are in one-to-one correspondence with the second injection through holes in the rectification barrel, the rectification sleeve is provided with third uniform injection through holes in columns, and the third injection through holes communicate with first rectification slots and the second rectification slots. The high-frequency pulse injection device is used for the stamping type engines.

Description

technical field [0001] The invention relates to the technical field of ramjet engines. Background technique [0002] The flow rate of scramjet engine is very fast, and the residence time of fuel is often on the millisecond level. For liquid hydrocarbon fuel, the process of droplet breakup, atomization and evaporation must also be considered, which increase the time required for the fuel to achieve a complete chemical reaction. The time required and the length of the combustion chamber. Restricted by conditions such as engine structure and quality, the length of the combustion chamber cannot be very long, so it is difficult to achieve complete mixing of fuel and incoming flow. Supersonic combustion is generally a diffusion flame, and the mixing effect directly determines the combustion performance of the combustion chamber. Therefore, fuel injection and blending technology has always been the key technology in scramjet research. [0003] At present, the fuel injection tech...

AI Technical Summary

Problems solved by technology

Among them, passive mixing enhancement is currently widely used, mainly including physical slopes, concave cavities, tower structures, etc., and there are mainly the following problems: (1) It can achieve macroscopic and large-scale turbulence, but the microscopic turbulence is insufficient To achieve a high degree of mixing of fuel and incoming flow; (2) The mixing of fuel and incoming flow has a relatively long process, which is difficult to meet the requirements; (3) It is difficult to control the impact of pressure growth caused by heat release

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