Irfan, Mohammad Nachrul (2017) Analisa Performansi Mekanisme Passive Variable Pitch Untuk Turbin Hidrokinetik Sumbu Vertikal Tipe Darrieus Dengan Variasi Geometri Airfoil Berbasis Q-Blade. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
2412100041-Undergraduate_Theses.pdf - Published Version Download (2MB) | Preview |
Abstract
Dalam penelitian ini dilakukan simulasi yang bertujuan untuk mencari parameter dari airfoil yang memiliki efek aerodinamik terbaik sebelum dipasang pada sebuah turbin. Penggunaan asymmetric airfoil dapat meningkatkan maksimum lift saat airfoil terpasang pada rotor turbin. Hal tersebut dibuktikan pada maksimum koefisien lift yang dihasilkan dengan mengubah symmetric airfoil 0018 menjadi asymmetric airfoil 2218 mengalami peningkatan sebesar 15%. Dengan meningkatkan cambered airfoil 2% hingga 8%, nilai maksimum koefisien lift serta maksimum sudut serang yang mampu dicapai semakin meningkat dari 1,62 dan 17˚ hingga 2,07 dan 21˚. Posisi maksimum cambered airfoil terbaik didapatkan pada 60% chord dengan nilai maksimum koefisien lift dan maksimum sudut serang yang dapat dicapai sebesar 1,57 dan 18˚. Efek stall terbaik didapatkan pada ketebalan 26 dengan maksimum sudut serang yang dapat dicapai sebesar 19˚. Nilai posisi maksimum relative thickness terbaik didapatkan pada 20,5% chord dengan nilai maksimum koefisien lift dan sudut serang yang mampu dicapai masing-masing sebesar 2,107 dan 20˚. Efisiensi yang dihasilkan dari rotor asymmetric hanya sebesar 5% saat menggunakan mekanisme passive variable pitch. Sedangkan pada rotor symmetric dapat mencapai 23% nilai efisiensi yang bisa dicapai dengan menggunakan mekanisme passive variable pitch.
================================================================================================
In this study a simulation was conducted to find the parameters of the airfoil which has the best aerodynamic effect before being mounted on a turbine. The use of asymmetric airfoil can increase the maximum lift when airfoil is installed on the turbine rotor. This is evidenced in the maximum lift coefficient generated by converting the symmetric airfoil 0018 to asymmetric airfoil 2218 has increased by 15%. By increasing the cambered airfoil by 2% to 8%, the maximum value of the lift coefficient and the maximum angle of attack that can be achieved increases from 1.62 and 17˚ to 2.07 and 21˚. The best cambered airfoil maximum position is obtained at 60% chord with maximum lift coefficient and maximum attainable angle of 1.57 and 18˚. The best stall effect is obtained at a thickness of 26 with a maximum of 19˚ attainable angle of attack. The best value of the best relative thickness position is obtained at 20.5% chord with the maximum value of lift coefficient and the attack angle that can be achieved respectively for 2,107 and 20˚. The efficiency resulting from asymmetric rotor is only 5% when using passive variable pitch mechanism. While the rotor symmetric can achieve 23% efficiency value that can be achieved by using passive variable pitch mechanism.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSF 621.406 Irf a-1 |
| Uncontrolled Keywords: | Airofil, Koefisien Lift, Stall, Efisiensi |
| Subjects: | T Technology > T Technology (General) V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM773 Ship propulsion, Electric |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis |
| Depositing User: | Mohammad Nachrul Irfan |
| Date Deposited: | 14 Dec 2017 03:49 |
| Last Modified: | 06 Mar 2019 03:26 |
| URI: | http://repository.its.ac.id/id/eprint/46863 |
Actions (login required)
 |
View Item |