Combined type flow guide pipe for exhaust of pulse detonation wind source engine

Abstract

The invention relates to a combined type flow guide pipe for exhaust of a pulse detonation wind source engine. The composite flow guide pipe comprises an inner pipe, an outer pipe, a spiral flow guide groove, a vortex air inlet, a flow guide pipe inlet, a flow guide pipe outlet and a Laval pipe, wherein the inner pipe and the outer pipe are welded together, the spiral flow guide groove is formed in the outer wall of the inner pipe through stainless steel bars, the vortex air inlet is formed in the outer pipe, the flow guide pipe inlet is connected with an outlet of a detonation chamber, and the flow guide pipe outlet is connected with the Laval pipe; fuel gas generated by the detonation chamber is exhausted through the inner pipe, air entering from the vortex air inlet flows outwards along the spiral flow guide groove, and the pipe wall of the inner pipe can be cooled; and meanwhile, air can eliminate gas turbulent flow and eliminate flame, and the formed hot air jet flow can be accelerated to supersonic speed after passing through the Laval pipe. The combined type flow guide pipe has the beneficial effects that the temperature of fluid at an outlet of the engine can be effectively reduced, meanwhile, continuous output of wind energy can be achieved, noise generated during operation of the engine can be reduced, and the exhaust speed can be increased.

Description

technical field [0001] The invention relates to the field of pulse detonation engines, in particular to a composite draft tube for outputting gas from a pulse detonation wind source engine. Background technique [0002] The gas outlet pipes of the existing pulse detonation engines are all single-walled pipes, which have a high temperature rise during exhaust and do not have the function of flame suppression. The gas is directly discharged to the air after passing through the gas outlet pipe. Contents of the invention [0003] The invention provides a composite flow guide pipe for the exhaust of a pulse detonation air source engine. [0004] The technical scheme adopted by the present invention is: two stainless steel pipes with different thicknesses are divided into an inner pipe and an outer pipe, and the outer wall of the inner pipe is welded with stainless steel strips to form a spiral diversion groove, and a vortex air inlet is installed on the outer pipe. The inlet o...

AI Technical Summary

Problems solved by technology

[0002] The outlet pipes of existing pulse detonation engines are all single-wall pipes, the temperature rises very high when exhausting, and they do not have the function of flame suppression. The gas is directly discharged to the air after passing through the outlet pipe.

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