Oxygen and methane torch ignition device and torch generation method thereof

Abstract

The invention provides an oxygen and methane torch ignition device and a torch generation method thereof. The technical problems that an existing ignition device is relatively small in ignition energy and cannot meet the requirements of large-flow and high-pressure thermodynamic systems such as a full-flow afterburning rocket engine for ignition starting are mainly solved. The device comprises a head part, a body part and a gas guide pipe which are sequentially connected. An oxygen inlet and a coaxial nozzle are sequentially arranged in the head part in the gas flowing direction, the oxygen inlet is coaxial with the center of the coaxial nozzle, and a nozzle methane inlet and at least one igniter are sequentially arranged on the side wall of the head part in the gas flowing direction. The body part comprises an inner wall, an outer wall and an afterburning methane inlet. An afterburning methane gas collecting cavity is formed between the inner wall and the outer wall, and the afterburning methane inlet is formed in the outer wall. The gas guide pipe comprises a throat part, a convergent section on the upstream of the throat part and a micro-expansion section on the downstream of the throat part. The method comprises the following steps that 1) central fluid is formed; 2) combustion gas is formed; 3) mixing and burning are conducted; and 4) sufficient combustion is performed.

Description

technical field [0001] The invention relates to a torch ignition device, in particular to a gas-oxygen-methane torch ignition device and a method for generating the torch. Background technique [0002] The full-flow afterburning cycle liquid oxygen methane engine is a high-flow, low-cost, reusable high-performance power system, and it is at the forefront of aerospace power system research today. The power system is composed of multiple core thermal components such as thrust chamber, oxygen-enriched generator, and fuel-rich generator. Multiple perspectives such as component versatility put forward all-round and multi-dimensional stringent requirements for the ignition device. [0003] Existing types of gas-oxygen-methane torch ignition devices mostly adopt percussion-type combustion organization schemes, and the cooling method is mostly exhaust cooling. The flow state in the gas pipe is mostly subsonic flow, and the flow range is mostly between 0 and 60g / s. between 0 and 1M...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the ignition energy of the current ignition device is relatively small, which cannot meet the needs of high-flow, high-pressure thermal systems such as full-flow afterburning rocket engines for ignition and start-up, and the large-flow, high-pressure, reusable ignition device Due to the technical problem that the temperature of the inner wall of the ignition device is too high due to the optimization of the combustion organization mode, a gas-oxygen-methane torch ignition device and a method for generating the torch are provided

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