Abstract The relatively large sampling volume of acoustic Doppler velocimeters (ADVs) is expected to influence their measurement turbulence. To study this effect, a series experiments using different sizes was conducted in an axisymmetric turbulent jet. results show that the mean velocities are not significantly affected by size volume. On other hand, reducing increase variances u and ? velocit...

The research of hypersonic process is limited by the transition model, turbulence and computational complexity. At present tunnel test still a better way to investigate than fluid dynamic (CFD) method. In this work, principle structure all-fiber photon Doppler velocimeter (PDV) are introduced. PDV based on laser effect consists an Mach Zehnder interferometer optical antenna. measurement accurac...