Determination of air and hydrofoil pressure coefficient by Laser Doppler Anemometry

Some results of experiments performed in water cavitation tunnel are presented. Pressure coefficient (Cp) was experimentally deter-mined by Laser Doppler Anemometry (LDA) measurements. Two models were tested: model of airplane G4 (Super Galeb) and hy-drofoil of high speed axial pump. These models are not prepared for conventional pressure measurements, so that LDA is applied for Cp determination. Numerical results were obtained using a code for average Navier-Stokes equations solutions. Comparisons between computational and experimental results prove the effec-tiveness of the LDA. The advantages and disadvantages of LDA application are discussed. Flow visualization was made by air bub-bles