input: unscaled moment of one blade
output: power coefficient of a 3-blades wind/tidal turbine
matlab code
function cp=coeff(m) % v : velocity % m : unscaled moment of one blade % rho : density % cp : power coefficient of 3 blades % omega: angular velocity, rad/s v = 0.6; A = 0.166; omega = 11.087; rho = 998.2; cp=(3*m*omega)/(0.5*rho*v*v*v*A)