摘要
Volumetric particle image velocimetry(PIV)is a laser technique measuring three-component velocity field in a volume.Common volumetric PIV techniques are defocusing PIV,multi-view PIV and holographic PIV.Tomographic PIV is an advanced approach of multi-view PIV,which significantly improves the spatial resolution of the measurement by using the multiplicative algebraic reconstruction technique(MART)to reconstruct the particle field.Due to the rapid progress being made in volumetric PIV measurements,this article focuses on introducing the principles of different volumetric PIV methods from aspects of particle reconstruction and velocity reconstruction.Advantages and limitations on applications are elaborated.Issues specific to volumetric PIV regarding illumination,digital imaging,depth of focus,ghost particle and spatial resolution are discussed.
Volumetric particle image velocimetry （PIV） is a laser technique measuring three-component velocity field in a volume. Common volumetric PIV techniques are defocusing PIV, multi-view PIV and holographic PIV. Tomographic PIV is an advanced approach of multi-view PIV, which significantly improves the spatial resolution of the measurement by using the multiplicative algebraic reconstruction technique （MART） to reconstruct the particle field. Due to the rapid progress being made in volumetric PIV meas- urements, this article focuses on introducing the principles of different volumetric PIV methods from aspects of particle recon- struction and velocity reconstruction. Advantages and limitations on applications are elaborated. Issues specific to volumetric PIV regarding illumination, digital imaging, depth of focus, ghost particle and spatial resolution are discussed.
基金
supported by the National Natural Science Foundation of China(11102013 and 11327202)
the"Weishi"Foundation of Beijing University of Aeronautics and Astronautics(YWF-12-RHRS-008)
