Measurements of velocity and droplet sizing in industrial applications using non-invasive laser systems

Many industrial applications involve the measurements of the velocity and size for the design of the products. Examples of such products are kitchen ventilator, water pump, household appliances and industrial oriented nozzles for fire suppression and paint. In the area of industrial safety, validation of the face mask for leakage is also an important aspect of the mask design. Fire suppression, paint nozzle, and mask filter are items which we encounter and rely on in our daily life. The design of products of those items to provide the best and optimal outcome is a critical aspect of the research and development in many industries. This paper covers two laser based techniques, Phase Doppler Particle Analyzer (PDPA) and Particle Image Velocimetry (PIV), for the design of fire suppression nozzles, paint nozzles, and N95 filter mask. The results of velocity profiles and droplet size distributions provided the critical information to evaluate the design and to allow corrections of deficiency in the process. Both the PDPA and PIV are non-invasive laser based techniques which introduce no disturbance to the flow and particle fields to be measured, giving the true representation of the measurement results.