Question

3) (35 points) A Francis turbine operates at its maximum efficiency point at nH-0.94, corresponding to a power specific speed (eq.9.1) of 0.9 rad. The effective head, HE, across the turbine is 160 m and the speed required for electrical generation is 750 rpm. The runner tip speed is 0.7 times the spouting velocity, co 2gHg, the absolute flow angle at runner entry is 72° from the radial direction, and the absolute flow at runner exit is without swirl. Determine: a the turbine power and the volume flow rate b) the runner diameter c) the magnitude of the tangential component of the absolute velocity at runner inlet

Answer 1

gnsuer ifven data tomthees.m we have 18.54 adl Pocoe Spee Specd 5)다. 9a) 48 54 Piooo 514

2 b) To calwau Lolada SP en 요 38. 54 D, 0.9984 m O,