Loading...
| Friend's email | |
| Your name | |
| Your email | |
| enter code | |
This page was sent successfuly
- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 48350 (08)
- University: Sharif University of Technology
- Department: Mechanical Engineering
- Advisor(s): Seif, Mohammad Saeed; Mehdigholi, Hamid
- Abstract:
- Partially submerged propellers are new type of propellers which general knowledge regard them is limited. These propellers found a growing market ahead of them and experts expect to use these propellers for big vessels at high speeds. This type of propulsors do not lose their efficiencies at high speeds and are assumed to be economical. Meanwhile, due to continuous hit to the water surface, huge stresses are exerted on the blades which needs to be fundamentally studied. Several researchers have studied the partially submerged propellers which unfortunately did not publish their results. Therefore, it is necessary to study several aspects of partially submerged propellers. Due to growing market of partially submerged propeller, the study of these propulsors to optimize their functionality and designing new types of these propulsors is inevitable. Experimental study of these propellers are believed to be very expensive and need highly facilitated centers, which are not accessible right now. Therefore, in the present thesis, a new and innovative method was used to simulate the operations of partially submerged propeller using the numerical software. The hydrodynamic performances of the propeller in several condition was investigated in the transition mode. Furthermore, the structural responses of the propeller under those conditions were studied. In the present thesis, the influences of the submergence ratio and shaft yaw angle on the operation of partially submerged propeller of 841-B was investigated. It was found that the decrement of the submergence ratio will reduce the thrust and torque exerted on the propeller. However these decrements will lead to a higher efficiency. Furthermore it was observed that propeller operating in maneuver condition may undergo less or more thrust and torques which in both cases the efficiency also increases. The use of numerical methods would certainly help to understand the operation condition of partially submerged propellers to reach a more optimized point
- Keywords:
- Surface Piercing Propeller ; Computational Fluid Dynamics (CFD) ; Hydroelasatic Analysis ; ANSYS Software ; Moving Mesh
Digital Object List
-
محتواي کتاب
- view
Bookmark