方案摘要
方案下载应用领域 | 能源/新能源 |
检测样本 | 煤炭 |
检测项目 | |
参考标准 | 暂无 |
采用LaVision的图像采集和处理软件平台DaVis 8.4,图像增强器IRO,四台sCMOS相机,四套长工作距离显微镜和两台激光器,构成了构成了一套层析显微PIV和甲醛平面激光诱导荧光(CH2O PLIF)测量系统,并利用这套系统研究了预混漩涡火焰中的熵输运
Reynolds-averaged enstrophy transport budgets are measured in turbulent swirl flames using micro-tomographic particle image velocimetry (-TPIV) and CH2O planar laser induced fluorescence (PLIF) across Ka = 11{45. The combined contributions of baroclinic torque and
dissipation to enstrophy transport are evaluated by subtracting the vortex-stretching and
dilatation terms from the Lagrangian derivatives. Enstrophy production through baroclinic
torque dominated over dissipation towards the product sides of the flame brushes. Enstrophy
budgets, conditioned on mean progress-variable and spatial coordinates, have shown
that the magnitude of baroclinic torque increases with bulk flow velocity. A conservative
estimate of the relative significance of baroclinic torque to vortex-stretching was found to be
constant. In contrast to DNS of flames in HIT, the significance of baroclinic torque relative
to vortex-stretching remained constant with bulk flow velocity. The observed flame-scale turbulence generation towards the combustion products has implications both for turbulence
and combustion closure models.
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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