Influence of jet-to-crossflow pressure ratio on nonreacting and reacting processes in a scramjet combustor with backward-facing steps
Influence of jet-to-crossflow pressure ratio on nonreacting and reacting processes in a scramjet combustor with backward-facing steps
复制标题
射流与错流压力比对向后台阶超燃冲压发动机燃烧室中非反应和反应过程的影响
DOI：
10.1016/j.ijhydene.2014.10.073
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发表时间：
2014-12
影响因子：
7.2
通讯作者：
谭建国
中科院分区：
文献类型：
--
作者：
黄伟;颜力;金亮;谭建国
在超燃冲压发动机中，喷流与横流压力比对燃烧模式转换有很大的影响，需要对这一信息进行综合研究。本文用数值方法研究了喷流与横流压力比对后台阶燃烧室混合和燃烧过程的影响，并利用两个类似的算例验证了所采用的数值方法。计算结果表明，该模型对无反应流场的壁面压力分布预测较好，但对峰值压力的预测均有所低估。然而，预测的反应流场的壁面压力分布与实验数据不匹配，它是高估。当氢气只从燃烧室底壁喷入时，无论是无反应流场还是有反应流场，混合效率都随喷流与横流压力比的增大而降低。当氢从顶壁和底壁同时喷入时，分离激波被向前推到燃烧室入口处，并由斜激波变为正激波。这表明，喷流/横流压力比对超燃冲压发动机燃烧模式的过渡有很大影响，通过控制燃油喷射方案可以实现稳定的冲压/超燃冲压发动机燃烧模式过渡。
The jet-to-crossflow pressure ratio has a large impact on the combustion mode transition in the scramjet engine, and this information needs to be explored comprehensively. The effect of the jet-to-crossflow pressure ratio on the mixing and combustion processes in a backward-facing step combustor has been investigated numerically, and two similar cases have been utilized to validate the numerical approaches employed. The obtained results show that the wall pressure distribution for the nonreacting flow field has been predicted well, and the peak pressures are all a bit underestimated. However, the predicted wall pressure distribution for the reacting flow field does not match well with the experimental data, and it is overestimated. When the hydrogen is injected only from the bottom wall of the combustor, the mixing efficiency decreases with the increase of the jet-to-crossflow pressure ratio irrespective of the nonreacting or reacting flow field. When the hydrogen is injected simultaneously from the top and bottom walls, the separation shock wave is pushed forward to the entrance of the combustor, and it varies from an oblique one to a normal one. This means that the jet-to-crossflow pressure ratio has a great impact on the combustion mode transition for the scramjet engine, and the stable ramjet/scramjet mode transition can be obtained by controlling the fuel injection scheme.
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影响因子：
5.6
作者：
黄伟;颜力;谭建国
通讯作者：
谭建国
通过 NPLS 对向后台阶上的超音速层流进行流动可视化
影响因子：
2.2
作者：
Yi, S. H.;Tian, L. F.;He, L.;Zhu, Y. Z.
通讯作者：
Zhu, Y. Z.
DOI：
10.1016/j.proci.2008.06.131
发表时间：
2009
期刊：
--
影响因子：
--
作者：
K. Miki;J. Schulz;S. Menon
通讯作者：
K. Miki;J. Schulz;S. Menon
影响因子：
1.9
作者：
J. Abbitt;C. Segal;J. McDaniel;R. Krauss;R. Whitehurst
通讯作者：
J. Abbitt;C. Segal;J. McDaniel;R. Krauss;R. Whitehurst
DOI：
10.1177/0954410012464455
发表时间：
2013-12
期刊：
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
影响因子：
--
作者：
W. Bao;Jichao Hu;Youhai Zong;Qingchun Yang;Meng Wu;Jun-tao Chang;Daren Yu
通讯作者：
W. Bao;Jichao Hu;Youhai Zong;Qingchun Yang;Meng Wu;Jun-tao Chang;Daren Yu