Influence of the velocity vector base relocation to the center of mass of the interrogation area on PIV accuracy

Influence of the velocity vector base relocation to the center of mass of the interrogation area on PIV accuracy

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This paper is aimed at modification of calculation algorithm used in data processing from PIV (Particle Image Velocimetry) Body Washes method.The modification of standard Multi-step correlation algorithm is based on imaging the centre of mass of the interrogation area to define the initial point of the respective vector, instead of the geometrical centre.This paper describes the principle of initial point-vector assignment, the corresponding data processing methodology including the test track analysis.Both approaches are compared within the framework of accuracy in the conclusion.The accuracy test Military Airplane Model Kit is performed using synthetic and real data.