하이브리드 PTV-PIV알고리듬에 의한 고정밀 와도 추정

Abstract

Abstract. A PTV algorithm was constructed using a linear transformation, in which the merits of the con-ventional PIV and PTV were adopted. In PIV calculations, the obtained velocity vectors are affected bythe filtering effects by its calculation principle. PTV techniques are widely used for their excellences ofmeasuring small scaled flows, such as nano and bio flows. However, PTVs produce vector errors due tointerpolation process. To overcome these problems, a hybrid PTV algorithm was constructed by combiningPTVs' and PIVs' benefits using a linear transformation. The Taylor-Green vortex flows were generatedfor the tests of vorticity calculations. The conventional gray-level cross-correlation PIV technique and 2-Frame PTV technique were tested for the same flows for comparisons with those obtained by the con-structed hybrid algorithm. The excellence of the constructed hybrid algorithm was validated through anactual experiment on the cylinder wake. Key Words: PIV(입자영상유속계), PTV(입자추적유속계), Hybrid Algorithm(하이브리드알고리듬 ), CylinderWake( 실린더후류), Vorticity(와도)