scholarly journals Potential Flow Analysis around a Inlet Duct of a Water-jet Propulsion System

2014 ◽  
Vol 16 (1) ◽  
pp. 1149-1154
Author(s):  
최희종
Keyword(s):  
Potential Flow ◽  
Flow Analysis ◽  
Water Jet ◽  
Propulsion System ◽  
Jet Propulsion ◽  
Inlet Duct

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.

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

Subsonic Propulsion System Installation Analysis and Optimization

1991 ◽  
Author(s):  
J. L. Colehour ◽  
B. W. Farquhar ◽  
J. E. Gengler ◽  
T. A. Reyhner
Keyword(s):  
Potential Flow ◽  
Low Cost ◽  
Flow Analysis ◽  
Flow Characteristics ◽  
Simulation Method ◽  
Inviscid Flow ◽  
Wave Drag ◽  
Propulsion System ◽  
Design Development ◽  
Improved Performance

Computational fluid dynamics (CFD) now allows analysis of propulsion system installations on subsonic transports to an extent that many configuration decisions can be made without testing. The methods discussed here utilize low-cost potential flow methods to predict inviscid flow characteristics and utility methods to model geometry, generate computational mesh, estimate wave drag, and perturb geometry in ways that promise improved performance. Jet plume effects are included in the potential flow analysis by means of a plume simulation method. Wave drag predictions yield levels of drag that are consistent with wind tunnel results, and, through contour optimization, wave drag for a trial propulsion installation geometry was reduced by about 50%. We conclude that through the use of methods such as these, many propulsion system installation design decisions can be made by analysis relatively quickly, which should lead to reduced design development time and cost.

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.

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.

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