Bladeshape of the runner in turbomachines

Traditional runner X blade runner

Bladeshape of radial machines Input parameters Head H [m] Flow rate Q [m3/s] Speed n [rpm] Choose Inlet diameter D1 [m] Outlet diameter D2 [m]

Axial view

Calculate all velocities in the inlet velocity triangle w1 u1 b1

Svartisen P = 350 MW H = 543 m Q* = 71,5 m3/S D0 = 4,86 m D1 = 4,31m B0 = 0,28 m n = 333 rpm

Calculate all velocities in the outlet velocity triangle b2 c2 w2

Draw the radial view c1 w1 u1 c2 w2 u2

Bladeshape of axial machines Input parameters Head H [m] Flow rate Q [m3/s] Speed n [rpm] Choose Inlet diameter D1 [m] Outlet diameter D2 [m]

Axial view

Jebba, Nigeria D0 = 8,5 m De = 7,1 m Di = 3,1 m B0 = 2,8 m *Q = 376 m3/s *H = 27,6 m *P = 96 MW D0 = 8,5 m De = 7,1 m Di = 3,1 m B0 = 2,8 m

Calculate all velocities in the inlet velocity triangles b1 c1 w1

u1 u1 b1 b1 c1 c1 w1 w1

Calculate all velocities in the outlet velocity triangles b2 c2 w2 u2 b2 c2 w2