Tomographic Laser Doppler Anemometry (TLDA) - a New Method to increase Spatial Resolution

摘要

In some applications the finite size of the probe volume of a Laser Doppler Anemometry (LDA) system limits its spatial resolution. Conventional methods to increase resolution often fail because of geometrical constraints. In this work a tomographic algorithm is presented to increase the spatial resolution of the LDA. The integral information on velocity and particle density within the probe volume is analyzed to obtain sub-volume resolution, which is limited by the increment of traversing the probe volume through the flow field. Employing an artificial velocity field the algorithm is verified and demonstrates its applicability to other measurement techniques with discrete measurand distribution.