超燃试验用加热器三维粘性流场数值模拟  

Numerical simulation of three dimension viscous flow of combustion-heater used for scramjet test

作　　者：陈超群[1] 韦宝禧[1] 章成亮[1] 徐旭[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《北京航空航天大学学报》2009年第5期591-595,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：超燃冲压发动机试验时,使用燃烧型加热器模拟高焓、高马赫数的来流条件,而加热器的喷注结构对改善加热器出口流场均匀性具有重要作用.使用三维数值模拟软件Fluent对2种喷注结构的燃烧型加热器进行了三维定常反应流场模拟,获得了设计工况下的流场.结果表明,采用多孔斜喷结构能使氢气在横向有较大的穿透深度,加上空气的引射作用在燃烧室头部产生大尺度横向涡,增强了氢气和空气的混合燃烧以及燃气的掺混,使加热器出口温度场不均匀性从53%降为21%,氧气摩尔分数不均匀性从63%降为17%,更有利于开展超燃冲压发动机试验.The combustion-heater was used to get high enthalpy, high mach number flow field in scramjet test. The injection is very important for the uniformity of the out-flow field. A three dimension numerical simulation software named Fluent was used to calculate the two injection. By examining the injection boundary, stream wise vortex etc. , the mixing and combustion efficiencies of two injections were compared, and the resuits show that the performance of the hydrogen multi-hole oblique injection is predominated over that of the hydrogen single-hole vertical injection.

关 键 词：超燃冲压发动机 流场测量 数值分析 

分 类 号：V211.72[航空宇航科学与技术—航空宇航推进理论与工程]