Abstract
This study aims to develop a PTV measurement method which is applicable to large spatial airflows, such as flows around windmill. Bubbles (soap bubbles) are considered as airflow tracer because of less environmental impact for the application in nature. The motion characteristics of the bubbles in high acceleration field are evaluated by comparing with ordinary smoke-based PIV. The size-dependent traceability of the bubbles for flows around an airfoil that involves separation in high attack angle is reported in this paper.
