This study presents the findings of a wind tunnel experiment investigating behaviour micrometric inertial particles with Stokes numbers around unity in turbulent wake stationary porous disk. Various concentrations $\varPhi _{v}\in ([6-19] \times 10^{-6})$ poly-disperse water droplets (average diameter 40–50 $\mathrm {\mu }$ m) are compared sub-inertial tracer particles. Hot-wire anemometry, pha...

A mesh adaptation methodology for wall-modeled turbomachinery Large Eddy Simulation (LES) is proposed, simultaneously taking into account two quantities of interest: the average kinetic energy dissipation rate and normalized wall distance y+. This strategy first tested on a highly loaded transonic blade with separated flow, compared to wall-resolved LES results, as well experimental data. The a...

This thesis is motivated by the necessity to understand the flow structure of turbulent flows in bends encountered in many technical applications such as heat exchangers, nuclear reactors and internal combustion engines. Flows in bends are characterised by strong secondary motions in terms of counter-rotating vortices (Dean cells) set up by a centrifugal instability. Specifically the thesis dea...

This paper describes an experimental investigation, by means of hot-wire anemometry, the characteristics velocity and temperature in a rotating turbulent boundary layer under isothermal non-isothermal conditions. The ranges parameters are as follows: Reynolds number from 10 000 to 25 000, rotational speed 0 150 rpm, y+ 1.8 100. relative difference is held constant at 0.1. Detailed distributions...

In this paper we describe a method to measure fluid flow fields that we call Multi-Point Laser Doppler Anemometry (MPLDA). Like Doppler Global Velocimetry (DGV) and single point Laser Doppler Anemometry (LDA), the technique derives information from the Doppler shift observed when light is scattered from a moving particle and exploits the advantages of these techniques. The method retains the el...

An experimental channel intended for investigation of a wake behind cooled cylinder was designed and constructed in this work. The setup is measurements with air at low Reynolds numbers. measuring techniques based on the standard visualization fog generator constant temperature anemometry (CTA) were used. flow performance investigated two cylinders placed inside square cross section. One kept t...

In this paper, synthetic jet actuators (SJAs) with three different orifice shapes (circular, square, and slot) the same cross-section area were investigated. The SJA efficiency (SJ) Reynolds number calculated based on time-mean reaction force measurement. momentum velocity was measured hot-wire anemometry additionally, sound pressure level (SPL) measured. equal maximally to 5.3% for each shape,...