方案摘要
方案下载应用领域 | 其他 |
检测样本 | 其他 |
检测项目 | |
参考标准 | 暂无 |
利用LaVisin公司提供的高速CMOS相机和高速图像增强器HS-IRO构成一套时间分辨PIV和PLIF联合测试系统,用于分析双稳态湍动旋流火焰中进动涡核(PVC)形成和火焰形状变化之间瞬态耦合过程。
The dynamics of a bi-stable swirl flame in a gas turbine model combustor is studied using simultaneous PIV and
OH-PLIF at 10 kHz. For most operating conditions, the flames in the combustor either feature a steady V-shape or a
steady M-shape. A hydrodynamic instability in the form of the so-called precessing vortex core (PVC) occurs only
for the M-shaped flames. For the V-flames, the PVC is suppressed due to radial density gradients at the burner nozzle
as shown in an accompanying study (Oberleithner et al., Proc 7th Euro Comb Meeting 2015). At some intermediate
operating conditions, bi-stable flames occur where the flame alternates randomly between V- and M-shape. This work
investigates a transition from V- to M-shape, focusing on the implied transient formation of a PVC and its role in the
transition of flame type. The measurements reveal a sequence of events where the PVC forms before the transition of
the flame shape. The sequence starts with a slight lift of the flame root due to a random turbulent event, which induces
a density profile that is favorable for formation of the PVC. The subsequently forming PVC creates an unsteady lower
stagnation point that causes a lift-off of the flame root, which finally results in the formation of a detached M-shaped
flame.
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
相关产品
汽车光学检测系统AIS
PT403型波长可调谐皮秒激光器
ANL系列高能量高重复频率DPSS纳秒激光器
APL4206 系列高能量皮秒激光放大器
UltraFlux FF/FT 5000 高能量可调谐飞秒激光器系统
UltraFlux FT300型波长可调谐飞秒激光器系统
Ekspla 超高功率激光器系统SYLOS 2A
LaVision PTUx 可编程时间控制单元
LaVision 用于粒子成像测速PIV的相机
LaVision StrainMaser 全场应变测试系统组件
LaVision 用于数字图像相关DIC的相机
LaVision StrainMaster 数字图像相关分析软件包
LaVision 标定板
LaVision StrainMaster 形变应变成像测量系统
LaVision StrainMaster DVC 体视全场应变测量系统
关注
拨打电话
留言咨询