., Susilo (2014) Simulasi Mekanisme Passive-Pitch Dengan Flapping Wing Pada Turbin Vertikal Aksis Arus Sungai Jenis Darrieus Straight-Bladed Berbasis CFD. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Telah dilakukan simulasi mekanisme passive pitch berbasis CFD
pada turbin vertikal aksis arus sungai tipe Darrieus straight-bladed
menggunakan mekanisme flapping wing. Simulasi mekanisme flapping
wing dilakukan dengan cara memutar turbin satu putaran (azimuth 0
sampai 360) dengan variasi sudut pitch 10° dan 20°. Berdasarkan hasil
simulasi menggunakan CFD, diperoleh pola perubahan nilai Fx , Fy dan
resultan gaya antara Fx dan Fy beserta arah resultan gaya yang
dihasilkan oleh turbin. Selain itu, diperoleh juga pola perubahan nilai
torsi pada sumbu x dan y serta resultan torsi beserta arah resultan torsi
yang dihasilkan oleh turbin. Pada simulasi mekanisme passive pitch
dengan menggunakan flapping wing diperolah nilai gaya dan torsi yang
terbesar diperolah ketika turbin berada di azimuth 100, nilai gaya yang
terbesar adalah 37.36 N dengan sudut tangensial sebesar -6.33
(kuadran IV), sedangkan nilai torsi yang terbesar adalah 14.46 Nm
dengan sudut tangensial sebesar 83.67 (kuadran I). Berdasarkan hasil
simulasi CFD, nilai gaya dan torsi yang dihasilkan oleh turbin
dipengaruhi oleh distribusi tekanan yang mengenai turbin pada satu
putaran turbin, ketika nilai gaya dan torsi yang dihasilkan oleh turbin
tinggi maka distribusi tekanan yang diterima oleh turbin hampir merata
pada ketiga foil turbin, pada azimuth 100 nilai tekanan yang diterima
oleh turbin sebesar 228.4 Pa. Fenomena berupa pola perubahan nilai
gaya, torsi serta pengaruh distribusi tekanan yang tidak diperoleh
ketika eksperimen dapat diperoleh dengan menggunakan software
CFD.
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The passive pitch mechanism on Darrieus straight-bladd vertical
axis river turbine with flapping wing mechanism has been simulated on
CFD. The flapping wing mechanism simulation is carried out by rotate
the turbin from azimuth 0 to 360) with pitch angle variation 10° and
20°. The CFD simulation result, shows that the value change pattern of
Fx , Fy , force resultant between Fx and Fy, and force resultant direction
which generated by the turbine. On the other hand, the value change
pattern of torque on x and y axis, torque resultant, and torque resultant
direction has been obtained too. From the simulation, the maximum
value of force and torque obtained were 37.36 N with tangential angle
of -6.33 (quadrant IV) and 14.46 Nm with tangential angle of 83.67
(quadrant I), respectively, for azimuth value of 100. Based on CFD
simulation result, the value of force and torque which generated by
turbine is affected by the pressure distribution on the turbine. When the
high value of force and torque is received, the pressure distribution on
the turbine almost evenly on the third turbine foil, at azimuth 100 the
value of pressure were received by the turbine of 228.4 Pa. The value
change pattern phenomena of force, torque, and the influence of
pressure distribution were not retrieved in experiments method can be
obtained with simulation using CFD software.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSF 621.406 Sus s 3100014055832 |
| Uncontrolled Keywords: | Flapping Wing, , Simulasi CFD, Distribusi Tekanan, Gaya, Torsi. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Yeni Anita Gonti |
| Date Deposited: | 23 Sep 2020 07:26 |
| Last Modified: | 23 Sep 2020 07:26 |
| URI: | http://repository.its.ac.id/id/eprint/82021 |
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