Mixing and Combustion Control Strategies For Efficient Scramjet Operation in Wide Range of Flight Mach Numbers
Mixing and Combustion Control Strategies For Efficient Scramjet Operation in Wide Range of Flight Mach Numbers
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DOI：
10.2514/6.2002-5116
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发表时间：
2002-09
期刊：
影响因子：
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通讯作者：
T. Sunami;Atsuo Murakami;K. Kudo;M. Kodera;M. Nishioka
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文献类型：
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作者：
T. Sunami;Atsuo Murakami;K. Kudo;M. Kodera;M. Nishioka
本文介绍了一种新型氢燃料双模态超燃冲压发动机燃烧室的点火试验结果。超燃冲压发动机燃烧室的目标是在较宽的飞行马赫数范围内获得较好的发动机性能、工作特性和可操作性。为了实现这样的超燃冲压发动机，我们特别关注以下技术问题：1）使用平行/小角度燃料喷射，2）控制燃烧室边界层分离，3）良好的点火/火焰稳定能力以及通过流向涡在超声速核心流中有效的燃料/空气混合和燃烧，以及4）超音速/亚音速燃烧模式的选择性可操作性以及在这些模式下的有效燃烧器操作。考虑到这些技术问题，我们的基本设想是，这种具有高性能和可操作性的燃烧室是一种多级燃烧室，其特点是组合使用“交替楔形支板”引射器和壁装斜板引射器，这两种引射器都产生流向涡。点火试验结果表明，这种燃烧室具有在燃烧室核心流中进行超声速燃烧的优越上级能力，并可在超声速/亚声速燃烧模式下操作，在宽飞行马赫数范围内具有高推力性能。
In this paper, we present our main results of the firing tests of a newly proposed hydrogen fueled dual-mode scramjet combustor. The present scramjet combustor aims at obtaining a better engine performance, working characteristics and operability in wide range of flight Mach numbers. To realize such a scramjet, we especially focus on the following technical issues 1) use of parallel/low angle fuel injection, 2) control of combustor boundary layer separation, 3) good ignition/flameholding ability as well as efficient fuel/air mixing and combustion in the supersonic core flow by the streamwise vortices, and 4) selective operability of supersonic/subsonic combustion modes and efficient combustor operation in these modes. Involving these technical issues, our basic idea for the combustor of such efficient scramjet performance and operability is a multiple staged combustor characterized by the combination use of the “Alternating-Wedge strut” injector and wall-mounted ramp injectors both of which generate streamwise vortices. Firing test results showed a superior ability of this type of combustor to perform a supersonic combustion in the combustor core flow and operability in supersonic/subsonic combustion modes with high thrust performance in wide range of flight Mach numbers.