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 |
Introduction Particle image velocimetry (PIV) has proven its strength as a flow diagnostic tool to characterise instantaneous velocity fields and derived quantities such as vorticity. Recent efforts apply momentum conservation principles on planar velocity data in order to extract more quantities, such as pressure fields and integral aerodynamic forces. The theoretical concepts for this 憄lanar pressure imaging? (PPI) have been established and its practical implementation for steady (or time-averaged) flows under approximately 2D flow conditions has been demonstrated (e.g. Baur and K鰊geter 1999, Gurka et al. 1999, Oudheusden et al. 2007). The next challenge is to extend PPI to unsteady flows. This extension can be done on basis of time-resolved flow diagnostics such as time-resolved PIV (TR-PIV), cf. Kurtulus et al. 2007. Instantaneous pressure fields are particularly interesting in bluff-body flows and in fluid-structure interactions, both are important in e.g. wind-engineering applications. A serious complication in extending the planar approach is that flows tend to develop 3D instantaneous structures even for nominally 2D configurations, especially at larger Reynolds numbers.
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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