方案摘要
方案下载| 应用领域 | 能源/新能源 |
| 检测样本 | 其他 |
| 检测项目 | |
| 参考标准 | 暂无 |
采用LaVision公司的sCMOS相机，图像增强器IRO，可编程时间控制单元PTU构成了一套OH，HCHO激光诱导荧光PLIF和粒子成像测速PIV联合测量系统。并将之用于湍流预混旋流火焰的测量和研究之中。
This paper reports on the investigation of coherent structures in a high-swirl jet with vortex breakdown (Re = 5 000) and combustion of a methane/air mixture (with equivalence ratio equal to 0.7 and 1.4). The measurements were performed by combined application of the stereo PIV, OH PLIF and HCHO PLIF techniques. The velocity data were processed by the proper orthogonal decomposition (POD) and the PLIF data was conditionally sampled according to the POD correlation coefficients. For the non-reacting jet and lean flame, the POD has revealed presence of a coherent structure, consisted of helical vortex structures in the inner and outer mixing layers. Based on the PLIF data it was found that the inner spiraling vortex structure was correlated with positive fluctuations of the local heat release.
文献贡献者
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
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