Sudarianto, Vendik (2007) Studi Eksperimental Karakteristik Aliran Fluida Melintasi Silinder Sirkular Yang Diganggu Oleh Silinder Teriris Tipe- 1 Studi Kasus Untuk Pengaruh Sudut Stagger (0° <A< 12°) Dengan Posisi Penampang Irisan Tegak Lurus Arah Aliran Bebas. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Aliran fluida yang melewati suatu silinder sirkular telahbanyak dipelajari, karena aplikasinya cukup luas dalam dunia engineering, contohnya dalam desain heat exchanger, bangunan lepas pantai dan cerobong asap. Satu studi yang pernah dilakukan adalah dengan meletakkan silinder pengganggu pada sisi upstream silinder sirkular. Ketika silinder pengganggu terletak secara tandem terhadap siinder sirkular, maka hanya akan terjadi gaya drag pada silinder sirkular, gaya lift akan terjadi ketika posisi silinder pengganggu terletak pada sudut stagger tertentu. Tujuan dari penelitian ini adalah untuk mengetahui karakteristik aliran melintasi silinder sirkular yang dipengaruhi oleh posisi stagger dan sudut iris dari silinder pengganggu. Penelitian dilakukan secara eksperimental pada Subsonic wind tunnel dengan bilangan Reynolds 5,3x1ff (berdasarkan diameter silinder utama). Silinder pengganggu yang digunakan adalah siinder teriris tipe-1 dengan diameter 48 mm, dengan variasi sudut iris rf', 53° dan 6~ dengan posisi sudut stagger rf', 3°, 5°, SO, 1 (f' dan 1 :r, sedangkan diameter silinder utama sirkular adalah 114 mm. Perbandingan jarak antara sumbu kedua silinder SID = 1,375. Pada posisi tersebut akan diukur distribusi tekanan di sepanjang kontur silinder utama dan silinder pengganggu serta profil kecepatan di belakang silinder susunan. Dari pengukuran distribusi tektman dapat dihitung koefisien drag dan koefisien lift dari silinder utama. Untuk memperkuat analisa, maka akan dilakukan visualisasi airan dengan methode oil flow picture. Hasil eksperimen yang didapatkan adalah pemberian silinder pengganggu tipe - I dengan Bs = 65° pada posisi a = (f , paling efektif menurunkan gaya resultan pada silinder utama. Pengurangan gaya resultan yang terjadi mencapai 99,95%, dibandingkan dengan silinder utama tunggal. Gaya resultan terkecil yang bekerja pada silinder utama untuk setiap variasi sudut iris silinder pengganggu adalah pada posisi a = rr
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Fluid flow through a circular cylinder has been widely studied, because its applications are quite broad in the world of engineering, for example in the design of heat exchangers, offshore structures and chimneys. One study that has been done is to place a disturbing cylinder on the upstream side of the circular cylinder. When the disturbing cylinder is located in tandem with the circular cylinder, then only the drag force will occur on the circular cylinder, the lift force will occur when the position of the disturbing cylinder is located at a certain stagger angle. The purpose of this study is to determine the flow characteristics across a circular cylinder that are affected by the stagger position and the angle of the disturbing cylinder. The study was conducted experimentally in a Subsonic wind tunnel with a Reynolds number of 5.3x1ff (based on the diameter of the main cylinder). The disturbance cylinder used is a type-1 sliced cylinder with a diameter of 48 mm, with variations in the angle of the slice rf', 53° and 6~ with stagger angle positions rf', 3°, 5°, SO, 1 (f' and 1 : r, while the diameter of the circular main cylinder is 114 mm. The ratio of the distance between the axes of the two cylinders SID = 1.375. At that position, the pressure distribution will be measured along the contour of the main cylinder and the disturbing cylinder as well as the velocity profile behind the cylinder array. From the tektman distribution measurement, the drag coefficient and lift coefficient of the main cylinder can be calculated. To strengthen the analysis, a visualization of the flow will be carried out using the oil flow picture method. The experimental results obtained are that the provision of a type-I disturbing cylinder with Bs = 65° at position a = (f , is the most effective in reducing the resultant force on the main cylinder. The reduction in the resultant force that occurs reaches 99.95%, compared to a single main cylinder. The smallest resultant force acting on the main cylinder for each variation of the angle of the disturbing cylinder slice is at position a = rr
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSM 620.106 4 Sud s-1 2007 (weeding) |
| Uncontrolled Keywords: | Silinder pengganggu, Sudut stagger, Sudut iris, KoeftSien drag, Koefisien lift.; Disturbance cylinder, Stagger angle, Cutting angle, Drag coefficient, Lift coeffrcient |
| Subjects: | Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 09 Oct 2025 05:12 |
| Last Modified: | 09 Oct 2025 05:12 |
| URI: | http://repository.its.ac.id/id/eprint/128533 |
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