ENERGY EFFICIENCY INCREASE OF ROTARY PUMP BY CONVERGENCY INTRODUCTION OF WHEEL INTER-BLADE CANAL
ПОВЫШЕНИЕ ЭНЕРГОЭФФЕКТИВНОСТИ ЦЕНТРОБЕЖНОГО НАСОСА ЗА СЧЁТ ВВОДА КОНФУЗОРНОСТИ МЕЖЛОПАСТНОГО КАНАЛА КОЛЕСА

Борис Боровский, Boris Borovskiy
2016 Bulletin of Bryansk state technical university  
The paper reports the substantiation of possibility rotary pump efficiency increase in view of hydraulic losses decrease in a centrifugal wheel at the expense of convergence introduction in its inter-blade canal. Besides losses decrease in a pump the transition to a convergent flow in a centrifugal wheel allows using the model of ideal liquid flow that was impossible at liquid flow in a diffusion inter-blade canal of a wheel providing mainly for an empirical direction of investigations. The
more » ... stigations. The convergence introduction, as it was shown by experiments, exceeds pump efficiency by 19% and pres-sure by 74% at the decrease of pulsation and vibrations of a pump that lightens the work of bearings. Theoretical investigations and experimental data have shown that at the convergent inter-blade canal of a wheel at the pump energy efficiency increase there is a situation of a flow different from the flow in the diffusion inter-blade canal. In such a way, the coefficient of the influence of a finite number of blades exceeds a unit, the angle of flow deviation at the wheel outlet takes a negative value (an angle of flow exceeds a bladeexit angle) and a theoretical pressure turns out to be higher considerably of a theoretical pressure at an infinite number of blades.
doi:10.12737/23174 fatcat:nqxngafjorhf5pdj2js2lmokmm