高焓风洞液氧酒精空气燃烧加热器设计与试验

Design and Test of Liquid Oxygen Alcohol Air Combustion Heater in High Enthalpy Wind Tunnel

关键词:  高焓风洞  空气液氧酒精三组元  燃烧加热  试验  加热器

Key words:  High enthalpy wind tunnel  Air/LOX/alcohol three-component  Combustion heating  Test  Heater

摘要:

高焓风洞是进行吸气式发动机地面模拟试验的重要设施，为满足高温、高压来流模拟的需求，研制了一种基于液氧酒精燃烧的空气加热器。该加热器采用液液自击喷注与空气直流分区组织燃烧，并利用等离子体点火器实现中心点火，生成高焓来流。10kg/s量级燃烧加热器点火调试表明：该装置点火启动迅速，建压平稳并在点火器关闭后维持了稳定来流的生成，覆盖范围宽，在地面试验领域具有良好的应用前景。

Abstract:

High enthalpy wind tunnel is an important facility for ground simulation test of air-breathing engine. In order to meet the demand of high temperature and high pressure flow simulation， an air heater based on liquid oxygen alcohol combustion was developed. The heater uses liquid-liquid self-impinging injection and air-direct current zone combustion， and uses plasma igniter to realize central ignition and generate high enthalpy to flow. The ignition debugging of the 10kg/s combustion heater shows that the device has a fast start-up， stable build-up pressure and maintains steady flow after the igniter is closed. The range is wide， and has a potential application prospect in ground testing field.