THE INFLUENCE OF RADIAL IMPELLER BLADE GEOMETRY ON ITS COMPRESSION AND BLADE LOADING

摘要

This paper is concerned with the influence of 2D radial blade geometry on its compression,static pressure and relative velocity distributions along the blade.The other basic geometric parameters are held constant.The change of the blade geometry was carried out through the selection of the camber line angle as a function of the radius,i.e.β_b=f(R).The influence of the blade geometry change on the observed values was determined from numerical solution of the flow in the impeller with help of the CFX software.The numerical solution was performed for original impeller geometry from the series of stages produced by ČKD NOVéENERGO,a.s.and for designed variants.