Experimental study of Crossflow turbine under different operating conditions

Abstract

In the present study, experiments were conducted to investigate the performance of Cross-flow turbines (CFT). A CFT runner with 16 degrees of angle of attack and a ratio of 0.67 inner to the outer diameter is selected for the experiment. The efficiency of the turbine was studied using a 3D printed runner with 30 blades at a constant head of 10m and varying rpm from 350 to 750 with an increment of 100 rpm and guide vane opening ranging from 10% to 100% with an increment of 10%. The results of the study indicate that CFT can be used effectively as it contains a flat curve that works well over wide flow conditions. CFT efficiency increases with increasing rpm to a certain point, after which it begins to decrease with increasing rpm.