方案摘要
方案下载应用领域 | 航空航天 |
检测样本 | 航空 |
检测项目 | |
参考标准 | 暂无 |
采用LaVision公司的粒子成像测速系统,对冲击激波碰撞影响下的横向喷射-腔体相互作用进行了研究。测试系统包括一台200毫焦的双脉冲激光器和IagerProX型CCD相机。
For high-speed air breathing engines, fuel injection and subsequent mixing with air is paramount
for combustion. The high freestream velocity poses a great challenge to ecient mixing both in
macroscale and microscale. Utilising cavities downstream of fuel injection locations, as a means to
hold the
ow and stabilise the combustion, is one mechanism which has attracted much attention,
requiring further research to study the unsteady
ow features and interactions occurring within
the cavity. In this study we combine the transverse jet injection upstream of a cavity with an
impinging shock to see how this interaction in
uences the cavity
ow, since impinging shocks have
been shown to enhance mixing of transverse jets. Utilising qualitative and quantitative methods:
schlieren, oil
ow, PIV, and PSP the induced
oweld is analysed. The impinging shock lifts the
shear layer over the cavity and combined with the instabilities generated by the transverse jet
creates a highly complicated
oweld with numerous vertical structures. The interaction between
the oblique shock and the jet leads to a relatively uniform velocity distribution within the cavity.
在一个双稳湍流涡旋火焰中,对间歇性动态的时间-频率定位
Particle-laden Taylor-Couette流:高阶转变和径向局部波浪涡旋的证据
7根杆束的流体-结构相互作用:用实验数据对比数值模拟
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