DESIGN AND SIMULATION OF WATERJET PROPULSION WITH THRUST 20 KN AND CRUISING SPEED 30 KNOT

• Main Author: Juwono, Ricky
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/52140
• Institution: Institut Teknologi Bandung

Indonesia is the biggest archipelago states in the world. This makes maritime policy such an important thing in Indonesia. One of the policies are Presidential Decree No. 16 Year 2017, which was made to make the Indonesian dream as the world’s maritime axis come true. One of the proponents of the Indonesian maritime industry is the water vehicle industry which has been developing through the years. The propulsion system is an important part of water vehicles, but unfortunately the propulsion system is still lacking in a few aspects. Because of that, the author tries to design a different propulsion as an alternative to the existing propulsion system. The waterjet propulsion system has an advantage in the performance and maintenance department, compared to the propeller system. This system consists of three main components, namely the inlet, pump, and nozzle. On this thesis, the author is going to design the pump and nozzle of the waterjet. Methodology starts from determining the nozzle dimensions; determining pump head and speed; determining type of pump; and designing the motion blade and pump guide blade. The system is then modeled with the use of the SOLIDWORKS software, before doing a Computational Fluid Dynamics (CFD) simulation using the ANSYS Fluent software. From the calculations, the pump speed of 1800 rpm and head of 25.617 m were obtained, with the type of pump being an axial pump. The simulation results showed that a thrust of 21.110 kN was generated at the operational point, with the efficiency of 54.3% and an error of 5.50% compared to the thrust design. The simulation results were relatively like other papers. The analysis of the propulsion is there is separation phenomenon at inlet duct and low velocity field at guiding vane outlet.