Session Cj - Experimental Techniques.
ORAL session, Sunday, November 23
310, Moscone Center
Off-axis Holographic PIV (HPIV) is a promising solution to the increasing demand for high spatial resolution 3D velocity field measurement. A fully automated off-axis HPIV system and data processing software have been implemented in Laser Flow Diagnostics Lab (LFD). High SNR achieved by the off-axis configuration relieves the demands for de-noising in the data processing stage and thus greatly improves the overall processing speed. The high SNR also brings a highly efficient, yet simple implementation of centroid finding algorithm. The core scheme of HPIV data processing, a fast "Concise Cross Correlation" (CCC) algorithm has been implemented which makes use of only particle centroid location and is thus much faster than conventional cross-correlation. Experimental data shows great promise of this system.