A synthetic spanwise-constant spatio-temporal mode is excited in a flat plate turbulent boundary layer through a spatially impulsive patch of dynamic wall-roughness. The streamwise wavelength of the synthetic mode approximately corresponds to the very large-scale motions present in high Reynolds number wall turbulence. Hot wire anemometer measurements made downstream of the roughness forcing re...

An experimental investigation of the local flow field in a Wells turbine has been conducted, order to produce detailed analysis aerodynamic characteristics rotor and support search for optimized solutions. The measurements were conducted with hot-wire anemometer (HWA) probe, reconstructing three-dimensional both upstream downstream small-scale turbine. multi-rotation technique applied measure t...

The paper focuses on the investigation of unsteady effects in shock wave/boundary layer interaction. study was carried out using a flat plate model subjected to free stream Mach number 1.43 and unit Reynolds (Re1) 11.5 × 106 1/m. To generate two-dimensional disturbances laminar boundary upstream separation region, dielectric barrier discharge employed. were generated within frequency range 500 ...

Flow sensors commonly are used in, for example, micro liquid handling systems or for measuring gas flows. One example is a gas flow sensor used as a microphone: the Microflown [3]. This sensor is designed to measure particle velocity, very small flows in a frequency range up to twenty kilo Hertz. While the signal to noise ratio is a very important parameter of the microflown an innovative measu...