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The objective function, to be maximized, is the torque coefficient.
Tests were conducted to evaluate the power coefficient, torque coefficient and static torque coefficient for each rotor.
where is called the torque coefficient and in general is a function of propeller design, Re,, and.
Starting behaviour of the SWT was studied by measuring and calculating the starting torque coefficient.
The overall friction coefficient and the torque coefficient (nut factor) have been calculated.
This was attributed to an increase in the torque coefficient just like the CFD results.
Results show that the maximum torque coefficient is obtained at rotation of 450 rpm.
The starting torque coefficient, dynamic torque and power performance were analyzed.
The blade model performance was estimated in terms of rotation torque coefficient and thrust coefficient.
The Bach rotor had a high value of power coefficient Cp; but it had negative values of static torque coefficient.
It was verified by re-simulating the torque coefficient data of a single bladed (NACA 0015 airfoil) VAWT published by the Sandia National Laboratories.
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