Investigation of combustion and flame stabilization modes in a hydrogen fueled scramjet combustor
Investigation of combustion and flame stabilization modes in a hydrogen fueled scramjet combustor
复制标题
DOI：
10.1016/j.ijhydene.2016.07.219
复制
发表时间：
2016-11
影响因子：
7.2
通讯作者：
Ye Tian;Shun-hua Yang;J. Le;Tie Su;Maoxiong Yue;Fuyu Zhong;Xiaoqiang Tian
中科院分区：
文献类型：
--
作者：
Ye Tian;Shun-hua Yang;J. Le;Tie Su;Maoxiong Yue;Fuyu Zhong;Xiaoqiang Tian
采用实验和数值模拟相结合的方法，对氢燃料超燃冲压发动机燃烧室的燃烧和火焰稳定模式进行了研究。计算结果是在来流马赫数为2.0、静温为656.5K、静压为0.125MPa的条件下得到的。用作燃料的氢的当量比（ER）从0.04变为0.30。介绍了壁面压力测量、纹影、差分干涉、火焰光度高速分幅和平面激光诱导荧光（OH-PLIF）等表征燃烧流场的方法。通过改变氢气的ER，可以获得两种典型的燃烧模式（超燃冲压模式和冲压模式）。当氢的ER小于0.23时，燃烧模式为超燃冲压模式;当氢的ER大于0.23时，燃烧模式为冲压模式。当燃烧模式为超燃冲压发动机时，火焰稳定模式为凹腔剪切层稳定燃烧;当燃烧模式为冲压发动机时，火焰稳定模式为凹腔剪切层/回流组合稳定燃烧。在冲压发动机工作模式下，火焰是不稳定的，并随气流振荡。
The combustion and flame stabilization modes in a hydrogen fueled scramjet combustor were investigated by experiments and numerical simulations in the present paper. The results were obtained with the inflow conditions of Mach number of 2.0, static temperature of 656.5 K and static pressure of 0.125 MPa, respectively. The equivalence ratio (ER) of hydrogen which was used as fuel changed from 0.04 to 0.30. Wall pressure measurement, schlieren, differential interferometry, high-speed framing of flame luminosity and OH-PLIF (planar laser-induced fluorescence) were introduced to characterize the combustion flow. Two typical combustion modes (scramjet mode and ramjet mode) could be attained by changing the ER of hydrogen. The combustion mode was scramjet mode when the ER of hydrogen was less than 0.23, while it was ramjet mode when the ER of hydrogen was greater than 0.23. When the combustion mode was scramjet mode, the flame stabilization mode was cavity shear layer stabilized combustion, and when the combustion mode was ramjet mode, the flame stabilization mode was combined cavity shear-layer/recirculation stabilized combustion. The flame was unstable and oscillated with the flow during the ramjet-mode operation.