Determination of the Gas-Dynamic Flow Parameters by the PIV Measurements

A method of calculating the pressure from the velocity field measurement data by using the PIV contactless technique is considered in the work. The pressure distribution was calculated by using the momentum equation, which are given in the form of Euler equations for a two-dimensional stationary compressible gas flow with allowance for the continuity equation. The method of determining the pressure is applied for two characteristic streams: gradient (in pressure) and low-gradient. Flow visualization pictures obtained with the help of the schlieren method and the laser sheet technique are presented. The possibility of calculating the average pressure values from the velocity measurements by using the PIV method is shown.