Optimization of Particle Image Velocimeters

摘要: The spatial resolution, detection rate, accuracy and reliability of a particle image velocimeter depend critically upon careful selection number parameters the PIV system fluid. An analytical model has been developed to analyze effects variation experimental which optimize system. A set six nondimensional are most significant in optimizing autocorrelation algorithm derived. They data validation criterion, density, relative in-plane displacement, out-of-plane velocity gradient parameter ratio mean diameter interrogation spot diameter. comparison is made with method analysis by Young’s fringes show this there valid for both methods interrogation.A study range specific fields undertaken determine influence these each case recommendations fields. presence gradients field examined cases pure shear solid body rotation. Corrections statistical bias developed, minimizing loss signal strength.The ...