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An air/methane burner for high-temperature pure air regenerative heating equipment

A heating equipment and methane combustion technology, applied in the field of air/methane burners, can solve the problems of lack of preheating burners, etc., and achieve the effects of effective thermal protection, wide working range and stable combustion

Active Publication Date: 2019-12-24
XIAN AEROSPACE PROPULSION INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no application of high-temperature pure air regenerative heating equipment in China, and there is also a lack of preheating burners to match it.

Method used

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  • An air/methane burner for high-temperature pure air regenerative heating equipment
  • An air/methane burner for high-temperature pure air regenerative heating equipment
  • An air/methane burner for high-temperature pure air regenerative heating equipment

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Experimental program
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Effect test

Embodiment

[0045] According to the application requirements of a certain high-temperature pure air regenerative heating equipment, a 50-500kW air / methane preheating burner is designed. The structure is as follows figure 1 shown. The working range of the burner air is 68.0-174.5g / s, and the working range of methane is 1.0-10.0g / s, which can meet the requirements of high-temperature pure air regenerative heating equipment under different power and temperature conditions. Under the matching conditions of different working conditions, The burner can achieve reliable ignition and stable combustion with 10 times the range of operating conditions.

[0046] The air / methane burner of the high-temperature pure air regenerative heating equipment of the present invention has achieved the expected purpose after many tests and assessments. When the working conditions change in a wide range, the ignition is reliable, the combustion is stable, and the shutdown on the reverse side is effective.

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Abstract

An air / methane combustor for a high-temperature pure air heat accumulation type heating device is characterized by comprising a head portion and a body portion, wherein the head portion and the body portion are fixedly connected together to form an air / methane combustor integrated structure, a premixing cavity is formed in the head portion, a combustion chamber inner cavity is formed in the body portion, air in the head portion enters the premixing cavity in a rotational flow manner and is mixed with methane, with the flow being adjustable, jetted in the radial direction at the premixing cavity to form premixed gas, a sudden expansion face backflow area is formed at the connection portion between the head portion and the body portion, the air / methane premixed gas is ignited at the sudden expansion face backflow area, and a preheated heat source is provided for the heat accumulation type heating device. According to the air / methane combustor for the high-temperature pure air heat accumulation type heating device, a pintle structure is designed on the head portion, under drive of an actuator, the injection area of a methane spray nozzle is changed, it is guaranteed that gas media arealways mixed at the best momentum ratio, and ignition and efficient combustion of the premixed gas is ensured.

Description

technical field [0001] The invention relates to an air / methane burner, in particular to an air / methane burner for high-temperature pure air regenerative heating equipment, which can be applied to a scram press direct connection test bench and other combustion devices that need to provide a wide range of variable power. Background technique [0002] At present, scramjet ground test equipment mostly adopts pollution heating methods such as combustion heating or arc heating. Domestically, there are combustion heaters and arc heating methods for fuels such as hydrogen, methane, alcohol, and kerosene. The research shows that there are many differences between the ground test performance of the scramjet engine using combustion heating or arc heating and the performance of the pure air flow down test, mainly because the simulated flow has H 2 O.CO 2 and NOx and other pollution components, there is a so-called "pollution effect". The basic principle of the pure air direct-connect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/02F23D14/66
CPCF23D14/02F23D14/66Y02E20/34
Inventor 王勇杨伟东李龙飞
Owner XIAN AEROSPACE PROPULSION INST
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