We consider absorbing chemical reactions in a fluid flow modeled by the coupled advection-reaction-diffusion equations. In these systems, interplay between diffusion and transportation causes enhanced dissipation phenomenon. show that time scale, together with reaction coupling strength, determines characteristic scale of reaction.

The paper illustrates the design of a new mechanical system for propeller blades pitch calibration in medium power wind turbines. peculiarity this is its capacity adjusting through feedback control system, which allows turbine to capture maximum amount energy from wind. In work an axial drive was studied by means racks capable linearly all intrinsically synchronous way, with advantage over trad...

Permanent Magnet Synchronous Motors (PMSM) have important features such as high torque, power density, acceleration, small volume, low noise and efficiency. With these features, is widely used in the industry. One of negativities that occur during operation electric motors speed fluctuations vibrations due to unbalanced loads. Unbalanced loading can be caused by character load, well poor mounti...

This study carried out a comparative analysis of indicators electricity consumption and CO2 emissions for four-pole induction motors (IMs) efficiency classes IE3 IE4 with rated power 2.2–200 kW in variable speed pump unit. In addition, innovative converter-fed synchronous reluctance (SynRMs) were evaluated. The comparison was derived from the manufacturer’s specifications drive systems (PDSs) a...