| Author | Yutthana Talaluxmana |
| Call Number | AIT Thesis no. WM-95-11 |
| Subject(s) | Hydraulics
|
| Note | A thesis submitted m partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. WM-95-11 |
| Abstract | Model study is one of the major method to study hydraulic phenomenon. Study at real site with prototype structure may not be possible to collect all necessary data since it will take more investment. In addition, model study is used to check structural design before being constructed. Vortex phenomenon at outlet structure of Lam Ta Khong Pumped Storage Development Project were studied intensively, when structure functioned as intake. Totally seventy-two model studies were proceeded and accomplished. Six different water levels and four variation of pumped discharges were chosen as experimental setup for each anti-vortex condition. Totally three cases of anti-vortex conditions were arranged i.e., without anti-vortex device, 4 anti-vortex beams and anti-vortex plate. Data were collected by both visual observation and measurement with newly developed instrument. It was found that vortex occurrence is nonstationary, unsteady and asymmetric due to variable flow phenomena such as changing in approach flow distribution. The strongest vortex type which occurred was vortex type 4. The maximum vortex size is 50 cm. The most frequent locations that vortices appear were at the outer channel of each outlet. The relationship between vortex occurrence and flow parameters were established, for example the relationship between vortex type, submergence, pumped discharge, velocity in pipe and submergence Flow number, etc. However, only the parameter of circulation number does not provide better relationship due to nonstationary tangential velocity of unsteady vortex. |
| Year | 1995 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. WM-95-11 |
| Type | Thesis |
| School | School of Civil Engineering |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Sutat Weesakul; |
| Examination Committee(s) | Tawatchai Tingsanchali;Kyotoh, Harumichi; |
| Scholarship Donor(s) | Royal Thai Government; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1995 |