Hydrogen-oxygen oxygen-rich preburner of full flow staged combustion cycle engine

Abstract

The invention relates to a hydrogen-oxygen oxygen-rich preburner used for a full flow staged combustion cycle engine system and belongs to the field of rocket engine structure design. The preburner comprises a gas dynamic resonance ignitor (1), a head part (2), a secondary injection segment (3), an adjustment segment (4), an exit segment (5), wherein the gas dynamic resonance ignitor (1) is arranged on the central axis of the head part (2) of the oxygen-rich preburner and is in threaded connection with the oxygen-rich preburner; the combustion gases of the ignitor are hydrogen and oxygen; as all the hydrogen is introduced into the oxygen-rich preburner through the ignitor, a hydrogen injector is removed from the structure of the head part of the oxygen-rich preburner; secondary injection is adopted in an oxygen-rich preburner body part, and a plurality of circles of radial oxygen injection holes are formed on the secondary injection segment (3); the adjustment segment (5) can adjust the length of the preburner and the axial position of the secondary injection; and the whole body of the oxygen-rich preburner is oxidation resistant due to nickel plating.

Description

【Technical field】 [0001] The invention relates to a scheme design of a gas-hydrogen-oxygen-oxygen-enriched pre-combustion chamber for a full-flow supplementary combustion cycle engine system, and belongs to the field of rocket engine structure design. 【Background technique】 [0002] The full-flow afterburning cycle system is a new type of rocket engine cycle system. It is the staged combustion technology with the highest combustion performance at present, and it is one of the important development directions of liquid rocket engine technology. In the full-flow supplementary combustion cycle engine system, since all its propellant will enter the pre-combustion chamber for combustion, its oxygen-enriched pre-combustion chamber has a high mixing ratio. One of the key technologies of the engine system. [0003] In the design of a small-flow gas-hydrogen-oxygen full-flow afterburning cycle engine, due to the small flow of hydrogen, the structural design of the oxygen-enriched pr...

AI Technical Summary

Problems solved by technology

Secondly, the proportion of oxygen is large, and the uniformity of gas blending is difficult to solve. For the oxygen-enriched circulation system with low mixing ratio, the secondary injection unit structure is generally adopted, that is, the secondary blending is carried out in the nozzle, such as literature Wu Baoyuan, Ge Li Hu, Tan Yonghua, Liu Hongjun "Experimental Research on High Compression Gauge of Oxygen-enriched Pre-combustion Chamber", but this method is applied to the full-flow hydrogen-oxygen-oxygen-enriched pre-combustion chamber with a higher mixing ratio and a greater difference in the ratio of hydrogen and oxygen Difficulty

Third, the high oxygen-enriched environment has high requirements on the oxidation resistance of the oxygen-enriched pre-chamber. Usually, special anti-oxidation coatings or anti-oxidation materials are used to manufacture the oxygen-enriched pre-chamber, which is costly, as documented by William M.Marshall, Sibtosh Pal, etc. "Benchmark Wall Heat Flux Data for a GO 2 / GH 2 Single Element Combustor》.AIAA2005-3572

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