Numerical flow and performance analysis of waterjet propulsion system

Park, Warn-Gyu; Jang, Jin Ho; Chun, Ho Hwan; Kim, Moon Chan

doi:10.1016/j.oceaneng.2005.02.004

Cited by 66 publications

(32 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The curve of the head required (as function of Q), expressed by the above equation, has to be compared with the head provided by the pump, obtained by means of the generalized pump map introduced before. From the equilibrium condition, it is possible to find the relation between ship speed and flow rate for each pump speed, and thus to calculate the jet thrust by (2).…”

Section: "Generalized Map" Methodmentioning

confidence: 99%

“…The first approach has recently received a major boost from the use of computational fluid dynamics (CFD) to optimize specific components of the waterjet system, such as pump impeller or inlet duct [1][2][3][4][5][6]. Moreover CFD calculations are claimed a reliable tool in predicting both noncavitating and cavitating conditions.…”

Section: International Journal Of Rotating Machinerymentioning

confidence: 99%

“…A brief analysis of the papers presented at several international conferences [1][2][3][4][5][6][7][8][9][10][11][12][13][14] shows that the developed researches follow, in general, two different approaches, as noted in [15]:…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dimensionless Numerical Approaches for the Performance Prediction of Marine Waterjet Propulsion Units

Altosole

Benvenuto

Figari

et al. 2012

International Journal of Rotating Machinery

View full text Add to dashboard Cite

One of the key issues at early design stage of a high-speed craft is the selection and the performance prediction of the propulsion system because at this stage only few information about the vessel are available. The objective of this work is precisely to provide the designer, in the case of waterjet propelled craft, with a simple and reliable calculation tool, able to predict the waterjet working points in design and off-design conditions, allowing to investigate several propulsive options during the ship design process. In the paper two original dimensionless numerical procedures, one referred to jet units for naval applications and the other more suitable for planing boats, are presented. The first procedure is based on a generalized performance map for mixed flow pumps, derived from the analysis of several waterjet pumps by applying similitude principles of the hydraulic machines. The second approach, validated by some comparisons with current waterjet installations, is based on a complete physical approach, from which a set of non-dimensional waterjet characteristics has been drawn by the authors. The presented application examples show the validity and the degree of accuracy of the proposed methodologies for the performance evaluation of waterjet propulsion systems.

show abstract

Section: "Generalized Map" Methodmentioning

confidence: 99%

Section: International Journal Of Rotating Machinerymentioning

confidence: 99%

See 1 more Smart Citation

Dimensionless Numerical Approaches for the Performance Prediction of Marine Waterjet Propulsion Units

Altosole

Benvenuto

Figari

et al. 2012

International Journal of Rotating Machinery

View full text Add to dashboard Cite

show abstract

“…(6) has used the iterative time marching method by Park and Sankar (1993) and Park, Jang, Chun and Kim (2005), that was developed for unsteady incompressible Navier-Stokes equations with artificial compressibility method of Rogers and Kwak (1991).…”

Section: Governing Equations and Numerical Methodsmentioning

confidence: 99%

Numerical simulation of cavitating flow past axisymmetric body

Kim¹,

Park²,

Jung³

2012

International Journal of Naval Architecture and Ocean Engineeri

Self Cite

View full text Add to dashboard Cite

show abstract

“…In recent years, the waterjet pump has been widely used for marine propulsion in large and high-performance vessels due to its high propulsive force, good maneuverability, low noise and high stability [1,2]. Many studies of water pumps have been conducted to investigate stall behaviors, cavitation performance, hydraulic performance, noise, etc.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimization of a mixed-flow pump impeller using modified NSGA-II algorithm

Huang

Luo

et al. 2015

Sci. China Technol. Sci.

View full text Add to dashboard Cite

In order to maintain a uniform distribution of pareto-front solutions, a modified NSGA-II algorithm coupled with a dynamic crowding distance (DCD) method is proposed for the multi-objective optimization of a mixed-flow pump impeller. With the pump meridional section fixed, ten variables along the shroud and hub are selected to control the blade load by using a three-dimensional inverse design method. Hydraulic efficiency, along with impeller head, is applied as an optimization objective; and a radial basis neural network (RBNN) is adopted to approximate the objective function with 82 training samples. Local sensitivity analysis shows that decision variables have different impacts on the optimization objectives. Instead of randomly selecting one solution to implement, a technique for ordering preferences by similarity to ideal solution (TOPSIS) is introduced to select the best compromise solution (BCS) from pareto-front sets. The proposed method is applied to optimize the baseline model, i.e. a mixed-flow waterjet pump whose specific speed is 508 min 1 m 3 s 1 m. The performance of the waterjet pump was experimentally tested. Compared with the baseline model, the optimized impeller has a better hydraulic efficiency of 92% as well as a higher impeller head at the design operation point. Furthermore, the off-design performance is improved with a wider highefficiency operation range. After optimization, velocity gradients on the suction surface are smoother and flow separations are eliminated at the blade inlet part. Thus, the authors believe the proposed method is helpful for optimizing the mixed-flow pumps.mixed-flow pump, waterjet pump, multi-objective optimization, numerical simulation, modified NSGA-II Citation: Huang R F, Luo X W, Ji B, et al. Multi-objective optimization of a mixed-flow pump impeller using modified NSGA-II algorithm.

show abstract

Numerical flow and performance analysis of waterjet propulsion system

Cited by 66 publications

References 4 publications

Dimensionless Numerical Approaches for the Performance Prediction of Marine Waterjet Propulsion Units

Dimensionless Numerical Approaches for the Performance Prediction of Marine Waterjet Propulsion Units

Numerical simulation of cavitating flow past axisymmetric body

Multi-objective optimization of a mixed-flow pump impeller using modified NSGA-II algorithm

Contact Info

Product

Resources

About