Kajian Eksperimental dan Numerikal Turbin Air Helikal Gorlov Untuk Twist Angle 60 Derajat dan 120 Derajat
Abstract: This research aims
to find the optimum parameters of the power coefficient againsttip speed ratio
λ, and twist angle ψ which is also the optimum parameters to designa helical
cross flow turbine type. Parameters are obtained from the test results andthrough
numerical simulations. The test is conducted using the two physical pa-rameters
of twist angle 60 degree and 120 degree with the pitch angle of 72.56degree and
57.8 degree, while the height and diameter turbine are 0.3 m and 0.18
mrespectively. Test results gives for the twist angle 60 degree has coefficient
powerof 10.1% while the twist angle 120 degree has the coefficient power of
9.9%. Nu-merical simulation gives the results of the calculation as follows:
the coefficientpower has 27.5% for twist angles 60 degree and has 31% for the
twist angle 120degree. The coefficient power data from the test results and
numerical simulationsshow different figures due to the numerical simulation
does not take into accountthe friction mechanical loss and other losses, but
the curve of the coefficient poweragainst tip speed ratio in the test and
numerical simulation shows a slightly differ-ent trend.
Key words: Gorlov Helical
Turbine, twist angle, power coefficient, tip speed ratio.Numerical simulation
Penulis: Iwan Kurniawan
Kode Jurnal: jpbiologidd140077
