Research of the dynamics of two-phase flows by optical methods PIV/IPI

The paper describes conditions and experimental results of the dynamics of two-phase flows research by optical methods PIV/IPI. Studies were carried out for the finely dispersed flow generated by the centrifugal atomizer. Such atomizer is necessary for the implementation of certification of aircraft engine critical mode under rain conditions: height of 6100 m, the Mach number M = 0.8. The flow parameters were measured for 9 modes of liquid pressure in the nozzle from 0.2 to 1.0 MPa in increments of 0.1 MPa. Velocity vectors obtained for these pressure modes shown that maximum velocity of the droplets is achieved nearby the nozzle section and ranges from 20 to 30 m/s. Increasing the pressure reduces the difference between velocities at peripheral and axial regions of the flow. (paper)