The modification of the mixed flow pump with respect to its stability

Článek recenzovaný mimo WoS a Scopus

en

This paper is focused on the CFD simulation of the mixed flow pump (i.e. radiaxial pump) with the aim to detect the reasons of Y-Q characteristic instability. The main reasons of pressure pulsations were detected by means of the analysis of velocity and pressure fields inside the pump combined with the theoretical approach. Consequently, the modifications of spiral case and pump suction area were made based on the knowledge of flow conditions and the shape of dissipation function. The primary design of pump geometry was modelled as the base model serving for the comparison of individual modification influence. The basic experimental data are available for this geometry. This approach replaced the more complicated and with respect to convergence of all computational tasks more difficult calculation for the compressible liquid flow. The modification of primary pump consisted in inserting the three fins types. Subsequently, the evaluation of pressure pulsations, specific energy curves and visualization of velocity fields were chosen as the criterion for successful design.

mixed flow pump, stability, pulsation, CFD analysis, fin, energy dissipation

2011-10-31

Ústav materiálov a mechaniky strojov SAV a Strojnícka fakulta STU

Bratislava

0039-2472

Strojnícky časopis

62

2

93–103

10