We developed a new wind turbine system that consists of diffuser shroud with broad-ring brim at the exit periphery and inside it. The shrouded brimmed diffuser, which we called “wind lens turbine” (WLT), has demonstrated power augmentation by factor about 2–5 compared bare for given diameter speed. increase in output depends on shape length height. However, simple theory presented this paper ar...

• Annual thermal performance of PTES in Dronninglund, Denmark monitored and analyzed. Trnsys model the developed validated against measurement 2015. The annual charged discharged energy were predicted with a deviation < ±4%. Ratio heat loss from cover, sides bottom respectively 60%, 38%, 2%. Influence soil types diffuser positions on investigated. Water pit storage is an effective long-term sto...

This paper demonstrates the possibility of active magnetohydrodynamic (MHD) control supersonic flows containing shock waves. The wave configurations that occur at inlet to a diffuser and in front streamlined semicylindrical model are used for purpose investigation. impact is carried out by organizing local gas discharge regions when applying magnetic field transverse currents. It has been shown...

In order to study the influence of position bulb on hydraulic performance a submersible tubular pump device, based large-scale pumping station, two schemes—involving front-mounted and rear-mounted bulb, respectively—were designed. The scheme uses GL-2008-03 model its conventional guide vane, while optimized design diffuser vane. method combining numerical simulation experimental testing was use...

The flow in centrifugal pumps is exceedingly complex, involving curvature, system rotation, separation, turbulence, and secondary flows. Moreover, the geometry is often asymmetric due to the volute shape. As a result, the relative motion between impeller and volute generates an unstableness which affects not only the overall pump performance, but is also responsible for pressure fluctuations, h...

Many systems with liquid ejectors and centrifugal pump are known. Often, jet pumps used to provide a self-priming mode, as well an acceptable pressure level for cavitation-free operation. The main disadvantage of such is the relatively low efficiency associated peculiarities energy transfer in ejector. To increase double surface driving suction flow swirl (with circumferential component velocit...

the paper presents the results of an investigation on the acoustic performance of vertical profile parallel barriers with quadratic residue diffuser tops and faces. a 2d boundary element method (bem) was used to predict the barrier insertion loss. the results of rigid and with absorptive coverage were also calculated for comparisons. using qrd on the top surface and faces of all vertical profil...