Rear-end-ignition pulse detonation combustion engine

Abstract

The invention discloses a rear-end large heat flow ignition pulse detonation engine system comprising an explosive mixed gas and isolation gas supply system, an ignition initiation system and detonation chamber systems. Each detonation chamber system comprises a detonation chamber inlet 1, a detonation chamber 2, an igniter 3, a spray pipe 4 and a jet spread pipe 5. Each igniter 3 is connected with a high pressure generator 6. The multiple detonation combustion chamber systems are distributed around the high pressure generator 6 circumferentially. The detonation chambers 2 work basically independently and do not disturb one another. The high pressure generator 6 comprises a high pressure generator inlet 6-1, a sparking plug 6-2, a detonator 6-3, a two-level detonation pipe 6-4, a high pressure generator shell 6-5 and a high pressure generator outlet 6-6. During work, high-temperature high-pressure gas generated by the high pressure generator 6 enters the igniters 3 through the jet spread pipes 5, and an explosive mixture is ignited.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a pulse detonation engine system. Background technique [0002] Detonation engine technology is a future engine technology with great development potential. Compared to other forms of combustion, detonation waves travel very quickly and can generate extremely high pressures and temperatures. The propulsion system based on detonation combustion has a high advantage in thermal cycle efficiency and can be widely used in aerospace vehicles, especially supersonic vehicles. [0003] Since the generation of detonation waves is intermittent and periodic, each detonation combustion chamber usually requires a periodic ignition source. Currently, the main ignition sources used include spark ignition, plasma ignition, pre-detonation tube ignition, etc. , each detonation chamber requires an independent ignition system and corresponding control system, which brings complexity to the system; ...

AI Technical Summary

Problems solved by technology

[0003] Since the generation of detonation waves is intermittent and periodic, each detonation combustion chamber usually requires a periodic ignition source. Currently, the main ignition sources used include spark ignition, plasma ignition, pre-detonation tube ignition, etc. , each detonation chamber requires an independent ignition system and corresponding control system, which brings complexity to the system; at the same time, these ignition methods have low ignition energy and require a long DDT pipe section; for some commonly used The explosive mixture, the way of ignition with small energy can not detonate well

[0004] During the filling process of the explosive mixture after detonation combustion, affected by the ignition frequency, some explosive mixtures will not participate in the combustion and heat release, but will be directly discharged into the atmosphere, which will cause certain waste and environmental pollution

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