Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
A REVIEW OF PARTICLE IMAGE VELOCIMETRY TECHNIQUES
Submission Author:
Anderson Girardi , GO
Co-Authors:
Anderson Girardi, Sigeo Kitatani Júnior, João Paulo Fonseca
Presenter: Anderson Girardi
doi://10.26678/ABCM.COBEM2021.COB2021-1247
Abstract
Abstract. Particle Image Velocimetry – PIV appeared approximately 40 years ago and figure as one of the most important achievements of modern experimental fluid mechanics. It has become an essential measurement procedure in fluid dynamics applied in research institutes, laboratories, large automotive and aerospace industries, it is possible to measure and evaluate an entire field of motion in different fluids and flows. Basically the technique consists in measuring the displacement of the fluid over a certain time interval, the experimental concept of the PIV uses tracer particles added to the flow and homogeneously distributed, which can be illuminated by a planar multipulsed laser obtained by an optical combination of mirrors, and a high speed camera controlled by a synchronizing trigger system combined with the laser, so the camera captures two consecutive images in a small time difference, and these images are processed and treated statistically to present the results. The diversity of equipment and practical applications for the PIV system requires a study of the technique and processing methods, aiming at greater efficiency in obtaining qualitative flow data, as well as the quantitative analysis of the velocity distribution of a flow with small rates measurement uncertainty, which can be redundantly validated with Computational Fluid Dynamics - CFD simulations. This literature review research approach is carried out in the comparative analysis of different experimental methods and procedures used for performing PIV, analyzing about 30 to 40 scientific articles published between the years 2011 to 2021. With the research it is possible to have a global view of wind tunnels, its basic characteristics of dimensions, types of open or closed circuits and maximum flow speed, and mainly the comparison between instruments and equipment needed for PIV, among them: high speed cameras, lasers and particle feeder. As a result of the study, it will be possible to characterize instruments, equipment, types and dimensions of tracer particles, image processing techniques, in addition to the advantages and limitations of the procedure. With the comparative analysis between experiments and methods used, it is possible to direct the specification of equipment and materials used in the technique, in addition to contribute with spreading knowledge for the method, which is in wide growth and possibilities for the rise of scientific knowledge in the Fluid Dynamics area.
Keywords
fluid dynamics, Velocity field, Particle image velocimetry, flow data, image processing
