Simulasi Mekanisme Passive-Pitch Dengan Flapping Wing Pada Turbin Vertikal Aksis Arus Sungai Jenis Darrieus Straight-Bladed Berbasis CFD

., 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. ============================================================================================================= 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: https://repository.its.ac.id/id/eprint/82021

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