OPTIMIZATION AND DESIGN OF THE GORLOV HELICAL TURBINE

• Main Author: IWAN KURNIAWAN (NIM : 23106009 ); Pembimbing : Dr.Priyono Sutikno
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16139
• Institution: Institut Teknologi Bandung

This research aims to find the optimum parameters of the power coefficient against tip speed ratio &#955;, pitch angle &#948; and twist angle &#968; which is also the optimum parameters to design a helical cross flow turbine type. Parameters are obtained from the test results and through numerical simulations. <br /> <br /> <br /> The test is conducted using the two physical parameters of twist angle 60 degree and 120 degree with the pitch angle of 72.56 degree and 57.8 degree, while the height and diameter turbine are 0.3 m and 0.18 m respectively. <br /> <br /> <br /> Test results gives for the twist angle 60 degree has coefficient power of 10.1% while the twist angle 120 degree has the coefficient power of 9.9%. Numerical simulation gives the results of the calculation as follows: the coefficient power has 27.5% for twist angles 60 degree and has 31% for the twist angle 120 degree. <br /> <br /> <br /> The coefficient power data from the test results and numerical simulations show different figures due to the numerical simulation does not take into account the friction mechanical loss and other losses, but the curve of the coefficient power against tip speed ratio in the test and numerical simulation shows a slightly different trend. So that the numerical simulation can be used to expand the research and produce optimum power coefficient of 33% obtained on the twist angle pitch is about 100 degree or the pitch angle is about 62.36 degree. <br /> <br /> <br /> Numerical simulation using a model &#954;-&#941; and simulate on the circumstances steady and transient. Both conditions has the same results in the term of the total torque while the torque curve within the azimuth in the steady condition shows not uniform at each blade azimuth position. This is not shown in the transient simulation until the simulation time has reached to the steady state condition.