Delay in the onset of static stall via passive vortex generators (VGs) results more efficient equipment. Nevertheless, most studies VGs are conducted on wind turbine blades rather than other turbomachinery devices like axial fan blades. This study is feasibility research to see whether aerodynamic performance improves presence VGs. Therefore, VGs' effect a blade with an elliptical profile havin...

Nuclear grade axial flow fans are widely used in nuclear power plants for ventilation and heat dissipation have the advantages of high efficiency rates. A fan with OGVs (outlet guide vanes) can recover kinetic energy dynamic impeller outlet winding to increase ventilator pressure, thus improving efficiency; therefore, play an essential role performance fan. Based on accurate numerical simulatio...

The concepts studied during Offset Stream Technology (OST) test were all designed to produce directional jet noise reduction in a separate flow engine configuration by redirecting the fan stream relative to the core stream, creating a thicker fan flow on one side of the jet. Previous studies, conducted at bypass ratios of five or less showed that lower noise levels would result on the thickened...

The flow of air generated by a new design of air assisted sprayer equipped with two axial fans of reversed rotation was analyzed. For this goal, a 3D sonic anemometer has been used (accuracy: 1.5%; measurement range: 0 to 45 m/s). The study was divided into a static test and a dynamic test. During the static test, the air velocity in the working vicinity of the sprayer was measured considering ...

Aerodynamic and aeroacoustic performance experiments were carried out on four- eight bladed, 1.542 m diameter, axial flow cooling fans, with constant solidity hub-to-tip ratio. Tests conducted in an ISO5801, Type A Fan Test facility. The tip gap (TG) was reduced from 4 mm (0.26% fan diameter) to 2 (0.13% diameter), 0 mm, for both configurations. noise profile of each configuration at the same T...