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...

the flow characteristics around an elliptic cylinder with an axis ratio of ar=2 located near a flat plate were investigated experimentally. the elliptic cylinder was located on the inside and outside a turbulent boundary layer region whose thickness (δ) is 0.38b. the reynolds numbers based on the height of the cylinder cross-section were 15000 and 30000. measurements of mean velocity and turbul...

Abstract The spatial and temporal resolution of a fast-response aerodynamic pressure probe (FRAP) is investigated in benchmark flow grid-generated turbulence. A grid with mesh size $$M=6.4$$ M = 6.4 mm tested for two different free-stream velocities, he...

in this study, the characteristics of the wake around a rotating circular cylinder have been investigated experimentally. to this end, a cylinder with a circular cross-section of plexiglas with the length of 400 mm and a diameter of 20 mm have been tested in the wind tunnel. using existing methods, the characteristics of the wake and the drag coefficients of the model in different cases have be...

The RC propeller performance under steady and sinusoidally time-varying freestream (stream-wise or longitudinal gust) was investigated in the University of Dayton Low-Speed Wind Tunnel (UD-LSWT) open-jet configuration. propellers were tested at varying incidence angles reduced frequencies. streamwise gust created by actuating shuttering system located test section exit characterized using hot-w...

The wakes of two different porous disks have been evaluated experimentally. Such are commonly used as physical actuator disk analogs for wind turbines. One is made a uniform wire mesh, while the other has nonuniform design with radial spars connected by rings. same solidity and produce approximately drag. also compared to wake model turbine solid disk. In contrast earlier studies, far wake, up ...

Abstract The wakes of a uniform and non-uniform porous disk exposed to two different turbulent flows are investigated experimentally. disks representative static wind turbine models found in literature. Six wake profiles were collected through hot-wire anemometry between three 30 diameters downstream the disks. Both one-point two-point statistics studied. results show that higher freestream tur...

The current research focuses on understanding the transition of pipe flow by using a triggering device. In particular, rod was installed within CoSma-Pipe at Brandenburg University Technology Cottbus-Senftenberg. effect rod, which has variable height perpendicular to axis inlet, examined in range 2,500 ≤ Re 31,000 where is Reynolds number based mean velocity, diameter, and air's viscosity. This...

The interior surface of a fluidic oscillator produced by FDM (Fused Deposition Modeling)-based additive manufacturing is associated with directional pattern corresponding to the 3D printing raster angle. present research explores impact angle ? = 0 , 45, and 90° from three commercial printers versus CNC machined oscillator. characterized using an optical measurement system. performance emanated...