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Table 1 Average value and standard deviation of the different parameters; H, n, s and n11 stand for head, rotational speed, cavitation number and speed factor ( ), respectively, where D is the runner diameter.

H (m) N (rot/min) s n11
Mean value 8.004 707.5 2.162 125
Standard deviation 0.019 0.32 0.005 0.1