STUDI EKSPERIMENTAL KARAKTERISTIK ALIRAN FLUIDA MELEWATI SILINDER TERIRIS SISI ATAS (TIPE D) DENGAN VARIASI SUDUT IRIS DAN SUDUT SERANG
| Main Author: | Astu Pudjanarsa |
|---|---|
| Format: | Article application/octet-stream eJournal |
| Bahasa: | eng |
| Terbitan: |
Tarumanagara University
, 2010
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| Subjects: | |
| Online Access: |
http://journal.tarumanagara.ac.id/index.php/ft2/article/view/104 |
Daftar Isi:
- The development of science and technology has endorsed to carry out various experiments to create something which useful and make easier for human. In fluid mechanics to reduce the drag force that exert on a body can done by modifying geometry of the body or controlling the boundary layer that develops over the body. Reducing this force will make useful for a construction which immersed in the flowing fluid. Unsymmetric boundary layer will develops if a fluid flow around a circular cylinder with upper cutting surface. In order to study a two dimensional flow over the upper cutting circular cylinder, an experiment was carried out by using cylinders 600 mm long and 60 mm diameter with angle of cutting of 0o, 36o, 53o, and 66o and the angle of attack variation of 0o, 15o, and 30o. The Reynolds number (based on the cylinder diameter) was 63,000. The experiment was carried out in subsonic wind tunnel at The Fluid Mechanics Laboratory, Department of Mechanical Engineering ITS. Results of the experiment, presented in static pressure distribution, shows that if fluid flows over bluff contour from upper cutting circular cylinder will be separated just at the corner then the flows reattach to the contour (bubble separation). If the cutting angle varies at a constant angle of attack, the bigger cutting angle will cause location of stagnation point closer to the cutting surface. If the angle of attack varies at a constant cutting angle, the bigger angle of attack will cause location of stagnation point move to the lower side, while location of occurring massive separation at the upper surface will be earlier and delayed at the lower surface.