The Design of Water-Jet Propulsion Systems for Hydrofoil Craft

1965 ◽  
Vol 2 (01) ◽  
pp. 15-25
Author(s):  
Joseph Levy
Keyword(s):  
Water Jet ◽  
Propulsion System ◽  
Specific Design ◽  
Propulsion Systems ◽  
Propulsive Efficiency ◽  
Jet Propulsion ◽  
Performance Curves

This paper contains a brief description of the water-jet propulsion system as applied to hydrofoil craft, and a discussion of the salient hydrodynamic aspects of the problem of fitting the main propulsion system to the specified thrust-versus-speed requirements. The factors that affect the overall propulsive efficiency and the weight of the system are discussed at some length; procedures for optimization of performance at the design cruising speed are outlined; finally, the processes by which the performance at off-design conditions may be evaluated are discussed and illustrated with performance curves for one specific design.

scholarly journals Utilization of Open-Source OpenFOAM Code to Examine the Hydrodynamic Characteristics of a Linear Jet Propulsion System with or without Stator in Bollard Pull Condition

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Parviz Ghadimi ◽  
Negin Donyavizadeh ◽  
Pouria Taghikhani
Keyword(s):  
High Speed ◽  
Water Jet ◽  
Propulsion System ◽  
Hydrodynamic Performance ◽  
Hydrodynamic Characteristics ◽  
Propulsion Systems ◽  
Thrust Coefficient ◽  
Jet Propulsion ◽  
Marine Industry ◽  
Total Thrust

With the development of high-speed crafts, new propulsion systems are introduced into the marine industry. One of the new propulsion systems is linear jet which is similar to pump jet and has a rotor, a stator, and a duct. The main difference between this system and pump jet is the placement of linear jet system under the hull body and inside a tunnel. Since this system, like a water jet, is inside the tunnel, the design idea of this system is a combination of a water jet and pump jet. In this paper, hydrodynamic performance of linear jet propulsion system is numerically investigated. To this end, the OpenFOAM software is utilized and RANS steady equations are solved using a k - ε turbulent model. The linear jet geometry is produced by assembling a Kaplan rotor, stator with a NACA 5505 cross section, and a decelerating duct. The results of numerical solution in the form of thrust, torque coefficient, and efficiency are compared with available experimental data for a ducted propeller, and good agreement is displayed. Subsequently, the hydrodynamic parameters are computed in two conditions: with a stator and without a stator. By comparing the results, it is observed that the total thrust coefficient of the propulsion system with a stator at all advance ratios increases by at least 40%. It is further observed that addition of a stator also improves its efficiency.

Research on the thrust of a high-pressure water jet propulsion system

2017 ◽  
Vol 13 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Zuti Zhang ◽  
Shuping Cao ◽  
Xiaohui Luo ◽  
Weijie Shi ◽  
Yuquan Zhu
Keyword(s):  
High Pressure ◽  
Water Jet ◽  
Propulsion System ◽  
Jet Propulsion ◽  
Pressure Water ◽  
High Pressure Water Jet

Research on Optimization of Water Jet Propulsion

2013 ◽  
Vol 380-384 ◽  
pp. 205-208
Author(s):  
Chang Tao Wang ◽  
Feng Long Kan ◽  
Lan Guang Zhao ◽  
Wei Wei
Keyword(s):  
Water Jet ◽  
Propulsion System ◽  
Nozzle Diameter ◽  
The Other ◽  
System Model ◽  
Jet Propulsion ◽  
Pump Speed

Based on characteristic of water jet, there are two important factors to product the thrust. One factor is pump speed and the other is the nozzle diameter. So, The significant optimization be required in order to overcome the existing water jet propulsion problem. In this paper, the water jet propulsion system model be studied at first, and then pump and nozzle optimization be discussed. At last, the result shows that the thrust of water jet by controlling the nozzle diameter size and pump speed.

Selection of Propulsion Systems for High-Speed Advanced Marine Vehicles

1975 ◽  
Vol 12 (01) ◽  
pp. 33-49
Author(s):  
Roderick A. Barr ◽  
Robert J. Etter
Keyword(s):  
High Speed ◽  
Surface Effect ◽  
Selection Process ◽  
Propulsion System ◽  
Propulsion Systems ◽  
Propulsive Efficiency ◽  
Marine Vehicles ◽  
Surface Effect Ship ◽  
System Selection ◽  
Ship Performance

Methods and criteria for evaluating and selecting propulsion systems for high-speed marine vehicles such as surface effect ships, hovercraft, hydrofoils, and planing craft are summarized. The problem of matching ship performance (drag, thrust, endurance, etc.) and geometric requirements to propulsion system characteristics to select the best propulsion system for a given application is discussed in some detail. Water-jet, marine propeller and air propulsion systems, including propulsor, propulsor mounting appendages, transmission and engines, are considered. An example utilizing a 4000-ton surface effect ship illustrates that the numerous tradeoffs involved in the selection process may lead to a propulsion system selection based on parameters other than propulsive efficiency. A second example for a 750-ton hydrofoil craft is referenced.

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