Kt, Kq and Efficiency Curves for the Wageningen B-Series Propellers

Abstract

The B_series propellers were designed and tested at the Netherlands Ship Model Basin in Wageningen. The open_water characteristics of 120 propeller models of the B_series were tested at N.S.M.B. and analyzed with multiple polynomial regression analysis. The derived polynomials express the thrust and torque coefficients in terms of the number of blades, the blade area ratio, the pitch_diameter ratio and the advance coefficient. The Reynolds number effect and the effect of variation of blade thickness on the B-series propeller characteristics have also been evaluated at N.S.M.B. In this report the polynomials derived are used to plot the open water propeller characteristics for Reynolds number and for the ranges of number of blades, blade area ratio and pitch_diameter ratio recommended by N.S.M.B. The extent of applicability of the regression polynomials is also discussed.