Scale Model Study of Propeller Induced Scour Development

Geisenhainer, Peter; Aberle, Jochen

doi:10.1007/978-3-642-30209-1_7

GeoPlanet: Earth and Planetary Sciences

2013

DOI: 10.1007/978-3-642-30209-1_7

|View full text |Cite

Scale Model Study of Propeller Induced Scour Development

Peter Geisenhainer

Jochen Aberle

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2016

2018

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Predicting axial velocity profiles within a diffusing marine propeller jet

Hamill

Kee²

2016

Ocean Engineering

View full text Add to dashboard Cite

12A full understanding of the hydrodynamic processes within the jet produced by a manoeuvring 69fully understood if an engineer is to be able to quantify any scouring damage that may occur, 70and, more importantly, size protection systems to be deployed to prevent further damage. 72The flow field produced by the action of rotating propeller blades is complex in nature. Near 73to the propeller, the passing blades and rotating hub influence the characteristics of the flow. 74As the jet diffuses downstream, the velocity characteristics become similar to a submerged 102The propellers used in this investigation varied in size (Dp), numbers of blades (N), pitch to 103 diameter ratios (P'), thrust coefficients (Ct), rake and blade area ratios (β), as shown in Table 104 1. The number of propeller blades varied from three to six. The pitch to diameter ratio ranged 107The blades of propeller 1, 3 and 4 had no forward inclination i. Equation 3 124 125The rotational speeds used in the programme of work were based on standard Froudian scale 134The propellers were operated across a range of speeds that bounded these target values, 135and these are listed in full in Table 2. 137The Reynolds numbers for the propellers operating at these rotational speeds ranged from 138

show abstract

Predicting axial velocity profiles within a diffusing marine propeller jet

Hamill

Kee²

2016

Ocean Engineering

View full text Add to dashboard Cite

show abstract

Experimental study of the velocity field induced by a propeller jet in an inland-ship model and the related bed scour

2018

View full text Add to dashboard Cite

The highly turbulent flow induced by ship propellers has a great potential to scour the alluvial bottom of navigational rivers and canals. Characterization of the complex flow field behind propellers is essential for forecasting the scouring action. In this study the velocity field and scour induced by two standard arrangements of propeller, nozzle and rudder from inland vessels are investigated experimentally with a ship model on a scale of 1:16. There are two objectives: first, to identify the influence of the ship stern on the flow field, and second, to assess induced scour depths in relation to maximum current velocities close to the bottom. It is found that the equilibrium scour depths for the two propeller arrangements are of the same order of magnitude, but that the time development of scour is different. The differences can be explained by the converging trend of the flow velocities at the bottom level for the two situations, when the vertical distance between the propeller and the bottom is high. It is also shown that existing relations for the velocity field require amendment when the propeller is ducted, and for adequately considering the effect of the ship stern and rudder type.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Scale Model Study of Propeller Induced Scour Development

Cited by 2 publications

References 2 publications

Predicting axial velocity profiles within a diffusing marine propeller jet

Predicting axial velocity profiles within a diffusing marine propeller jet

Experimental study of the velocity field induced by a propeller jet in an inland-ship model and the related bed scour

Contact Info

Product

Resources

About