Experiments on flame stabilization in a scramjet combustor with a rear-wall-expansion cavity
Experiments on flame stabilization in a scramjet combustor with a rear-wall-expansion cavity
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后壁膨胀腔超燃冲压发动机燃烧室火焰稳定实验
DOI：
10.1016/j.ijhydene.2017.09.059
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发表时间：
2017-10
影响因子：
7.2
通讯作者：
Zhenguo Wang
中科院分区：
文献类型：
--
作者：
Zun Cai;Xiaobin Zhu;Ming-Bo Sun;Zhenguo Wang
在马赫数为2.92、滞止压力为2.6 MPa、滞止温度为1530 K的来流条件下，研究了带后壁膨胀凹腔的氢燃料超燃冲压发动机燃烧室的火焰稳定特性。比较了四种有代表性的喷油方案对燃烧过程的影响。实验结果表明，两个平行喷嘴（腔上游30 mm）和单个喷嘴（腔上游10 mm）的喷射方案，随着当量比的增加，放热略有增加。而在相同当量比下，采用两个喷嘴级联（凹腔上游30 mm和10 mm）和两个喷嘴并联（凹腔上游10 mm）的喷射方案，燃烧室的燃烧更剧烈、更稳定。对于具有两个级联喷射器（腔上游30 mm和10 mm）的喷射方案，尽管腔上方的燃烧强度较低，但与具有两个并联喷射器（腔上游10 mm）的喷射方案相比，腔下游存在更宽的放热区。研究还表明，在火焰稳定过程中，后壁膨胀凹腔采用两个喷嘴（凹腔上游30 mm和10 mm）级联的喷射方案是一种较好的燃料喷射方案，可以在燃烧室中获得稳定的火焰。
The current study investigated the characteristics of the flame stabilization in a hydrogen fueled scramjet combustor with a rear-wall-expansion cavity at the inflow condition of Mach 2.92 with stagnation pressure 2.6 MPa and stagnation temperature 1530 K. Effects of four representative fuel injection schemes on the combustion process had been compared. The experimental results show that the injection schemes with two parallel injectors (30 mm upstream the cavity) and with single injector (10 mm upstream the cavity) achieve slightly heat release increment when increasing the equivalence ratio. While the injection schemes with two cascaded injectors (30 mm and 10 mm upstream the cavity) and with two parallel injectors (10 mm upstream the cavity) would perform obviously more intense and stable combustion in the combustor at the same equivalence ratio. For the injection scheme with two cascaded injectors (30 mm and 10 mm upstream the cavity), although there would be less intense combustion above the cavity, there exist wider heat release zones downstream the cavity compared to the injection scheme with two parallel injectors (10 mm upstream the cavity). It is also demonstrated that the injection scheme with two cascaded injectors (30 mm and 10 mm upstream the cavity) is a favorable fuel injection scheme for the rear-wall-expansion cavity during the flame stabilization process, and a robust and stable flame would be achieved in the combustor.
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DOI：
10.2514/6.2012-947
发表时间：
2012-01
期刊：
--
影响因子：
--
作者：
Ryan T. Milligan;Jiwen Liu;Chung-Jen Tam;D. Eklund;M. Hagenmaier;D. Davis;D. Risha;M. Gruber;T. Mathur
通讯作者：
Ryan T. Milligan;Jiwen Liu;Chung-Jen Tam;D. Eklund;M. Hagenmaier;D. Davis;D. Risha;M. Gruber;T. Mathur
后壁膨胀腔超燃冲压发动机燃烧室火焰稳定过程的大涡模拟
影响因子：
7.2
作者：
Wang Zhenguo;Cai Zun;Sun Mingbo;Wang Hongbo;Zhang Yanxiang
通讯作者：
Zhang Yanxiang
影响因子：
1.9
作者：
E. T. Curran
通讯作者：
E. T. Curran
后壁膨胀腔超燃冲压发动机燃烧室燃料输送和混合过程的大涡模拟
影响因子：
3.5
作者：
Zun Cai;Xiao Liu;Cheng Gong;Mingbo Sun;Zhenguo Wang;Xue-Song Bai
通讯作者：
Xue-Song Bai
影响因子：
7.2
作者：
Ye Tian;Shun-hua Yang;J. Le;Tie Su;Maoxiong Yue;Fuyu Zhong;Xiaoqiang Tian
通讯作者：
Ye Tian;Shun-hua Yang;J. Le;Tie Su;Maoxiong Yue;Fuyu Zhong;Xiaoqiang Tian