BLADE FOR HIGH-HEAD KAPLAN TURBINE'S RUNNER

摘要

The solution concerns the shape of the vane of the runner with a lower runaway speed. With regards to the standard solution of the vane's shape, the construction of the runner's vane according to the solutions lowers the runaway speed by 10 to 20%. The runner vane is defined by lengths of chords of the profiles on round sections according to the following formula <IMAGE>,Where:t = pitchl = length of the chord of the profileR = the variable radiusRmax = the round section radiusa, b, c, = the coefficients determining the change of shape of the lengths of the vane profiles chordsa = coefficient in the range of 1.5 to 1.55b = coefficient in the range of 0.5 to 0.53c = coefficient in the range of -1.03 to -1.05.