Determination of Theoritical Shaft Torque on Turbin Gorlov Model with Wavy Blade

Abstract

This paper discuss about the computational study of determination shaft torque of verticalaxis water turbine (VAWT) which construct using Gorlov concept. In this research, thestudy conducted by modification of blade profile using wavy dispositive in order toincrease the drag and lift coefficient. Simulation is conducted using Numeca software in 2-D, which is intended to get the lift and drag coefficient relationship in various angle ofattack. Value of real angle of attack at various positions of turbine blades can bedetermined by a triangle speed rules and can be simulated by using Matlab software.Special algorithm is developed based on mathematical formulation and simulate usingMatlab programing. Mathematical formulation is developed using multi cross sectionelement (slice) of VAWT blade, which then twist integrated along blade span. Twistdeveloped based on angular position of blade cross section related to the first. Lift anddrag parameter which is the main variable of calculation, also developed from 0 to 360degree angular position. Based on computation study result, so theoretical torque value ofVAWT obtained, for one cross section as well as full turbine. Vortex generator as a specialdispositive which using in VAWT will augmented the theoretical of shaft torque.