PIV在化工搅拌釜内流动测量中的应用

PIV Application in Flow Measurement within Chemical Stirred Tank

着重探讨了新一代全场光学测速技术——粒子图像速度场仪(PIV)在搅拌混合实验中的应用,指出PIV及其衍生的测速技术在搅拌混合实验研究中具有广泛应用前景。PIV流场测量结果兼具很高的空间分辨率和时间解析度,可以得到搅拌釜中混合流体的瞬时2D或3D速度场以及浓度场等信息,进行非定常湍流特性研究,有助于建立搅拌釜内多相流动模型,揭示搅拌混合作用机理,优化搅拌桨型设计,促进搅拌混合技术的进一步发展。

Particle image velocimetry（PIV） was introduced,which has great application in the experimental study on mixing flow in a stirred tank.PIV has higher space-resolution and time-resolution.Based on PIV,2D or 3D instant velocity fields and the mixing flow＇s density field can be obtained to benefit the research of unsteady turbulent characteristics,the building of multi-phase flow model,the revealing of stirred autoclave＇s mixing mechanism and the optimization of mixing paddle design as well as the promotion of further development of the mixing technology.