Studi Numerik Karakteristik Turbin Arus Laut Vertikal Aksis Jenis Straight Blade Dengan Cascade Hydrofoil Berbasis Computational Fluid Dynamics

Imanuddin, Fahmi (2016) Studi Numerik Karakteristik Turbin Arus Laut Vertikal Aksis Jenis Straight Blade Dengan Cascade Hydrofoil Berbasis Computational Fluid Dynamics. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Torsi merupakan salah satu karakteristik dari turbin arus laut. Torsi sebanding dengan gaya yang mendorong benda bergerak. Pada penelitian ini dilakukan simulasi untuk mengetahui pengaruh jumlah hydrofoil terhadap karakteristik turbin arus laut vertikal aksis tipe straight blade. Terdapat tiga jenis model turbin yang disimulasikan, yaitu turbin 3 hydrofoil (model 1), turbin 6 hydrofoil dengan cascade 2 (model 2) dan turbin 9 hydrofoil dengan cascade 3 (model 3). Setiap model dilakukan simulasi dengan variasi kecepatan aliran 0,5; 1 dan 1,5 m/s. Berdasarkan hasil simulasi, nilai gaya dan torsi yang dihasilkan oleh turbin model 3 lebih besar dibandingkan dengan model lainnya. Gaya yang dihasilkan turbin terjadi karena tekanan dari fluida terhadap turbin, sehingga nilai gaya sebanding dengan besarnya tekanan. Pada turbin model 3 luasan area lebih besar dibandingkan model lainnya yang menyebabkan banyak tekanan yang didapatkan. Profil aliran kontur tekanan dan streamline kecepatan pada turbin merupakan fenomena aliran yang tidak dapat dilihat pada uji eksperimen, serta menjelaskan tekanan yang didapatkan dari fluida. ====================================================================================================== Torque is one of the characteristics from ocean current turbine. Torque is proportional to the force that drives the moving objects. This research conducted a simulation to determine the effect of the number of hydrofoil on the characteristics of the vertical axis ocean current turbine straight blade type. There are three types of models which are simulated turbine 3 hydrofoil (model 1), the turbine 6 hydrofoil to cascade 2 (model 2) and the turbine 9 hydrofoil with cascade 3 (model 3). Every models simulated by varying the flow rate of 0.5; 1 and 1.5 m / s. Based on simulation results, the value of the force and torque produced by the turbine model 3 is greater than the other models. The resulting force of turbine caused by the pressing of the fluid on the turbine. Hence, the value of the proportional force is equal to the number of pressure. At the turbine model 3 that area larger than other models which obtain much pressure. Flow profile pressure countors and streamlined speed on turbine are phenomena that can not be seen in the experimental, and determine the pressure which is obtained by fluid.

Item Type: Thesis (Undergraduate)
Additional Information: RSF 621.24 Ima s
Uncontrolled Keywords: gaya, torsi, jumlah hydrofoil, cascade, tekanan
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power.
Divisions: Faculty of Industrial Technology > Physics Engineering > (S1) Undergraduate Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 15 Mar 2018 03:18
Last Modified: 27 Dec 2018 01:51
URI: http://repository.its.ac.id/id/eprint/51536

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