1. Project Title: Marine Propeller Design and Performance
Marine Engineering Technology Department , College Of Maritime Transport
Students name: Odedina Adewunmi, William Dennis Anietimfon, Ogbuse Woyengimieseindou, Ndubuisi Emmanuel Promise, Akpaninyang, Ladymercy Emmanuel, Udoh Christopher Iniobong,
Dede Godlove
supervisors: Dr. Mohamed Kotb and Engr.Mohammed Shauman
Introduction
Conclusion
Ship propeller is used for propulsion in most types of vessels, irrespective of their type and size. The notion of ‘pushing’ or ‘propelling’ a ship forward came into being since the advent of ships themselves. After the era of those large sails governing the maneuverability and powering the ship, propellers became the most conventional means of driving the ship in the seas.
The aim in the propeller design is to obtain the optimum propeller which applies to minimum power requirements and against maximum efficiency conditions at an adequate revolution number. Usually two methods are used in the propeller design. The first is to use diagrams obtained from open water propeller experiments for systematic propeller series. The second is to use mathematical methods (lifting line, lifting surface, vortex-lattice, BEM (boundary element method) based on circulation theory.
Propellers have to be designed in a way to reduce noise and vibrations and hence cavitation to the lowest possible level in order to achieve propeller efficiency. So our case study would be aimed at reducing the cavitation to the lowest possible level.
In this report, the first method will be used in choosing the appropriate propeller.
Based on the work carried out in this research, a numbers of conclusions are summarized as follows;
• An extensive survey of existing marine propeller experimental data particularly an open water test for a number of different configurations was made.
• Some propellers types including the general theory of operation of propellers and the propeller geometry.
• Propeller performance including its types, ship resistance and cavitation.
• Numerical method of designing propellers including wageningen B series and Bp –δ curve for effective propellers with minimum cavitation.
• The output of the code presented in this thesis can be used to compare the performance of several propeller models.
• The method described could be extended to include propeller cavitation aspects and relation to geometrical and operation parameters.
RESISTANCE CALCULATION
PROPELLER DESIGN
Case study
PROPELLER DESIGN USING NUMERICAL METHOD
WAGENINGEN B SERIES
Methodology
CAVITATION CHECK
Alican Deval
This case study was carried out on a general cargo ship (Alican Deval) with a delivered power of 4020HP (2999KW) propeller RPM 570 and advanced velocity of 12 km/hr (3.333 m/s) displacement 9132 MT. calculate the PB constant, the propeller efficiency, the slip constant Δ, the propeller pitch, the propeller ratio and the propeller diameter, the ship resistance and pick a suitable propeller P/D to avoid cavitation using the cavitation chart.