Book contents
- Frontmatter
- Contents
- Preface
- Nomenclature
- Abbreviations
- Figure Acknowledgements
- 1 Introduction
- 2 Propulsive Power
- 3 Components of Hull Resistance
- 4 Model-Ship Extrapolation
- 5 Model-Ship Correlation
- 6 Restricted Water Depth and Breadth
- 7 Measurement of Resistance Components
- 8 Wake and Thrust Deduction
- 9 Numerical Estimation of Ship Resistance
- 10 Resistance Design Data
- 11 Propulsor Types
- 12 Propeller Characteristics
- 13 Powering Process
- 14 Hull Form Design
- 15 Numerical Methods for Propeller Analysis
- 16 Propulsor Design Data
- 17 Applications
- Appendix A1 Background Physics
- Appendix A2 Derivation of Eggers Formula for Wave Resistance
- Appendix A3 Tabulations of Resistance Design Data
- Appendix A4 Tabulations of Propulsor Design Data
- Index
- References
12 - Propeller Characteristics
Published online by Cambridge University Press: 07 September 2011
Book contents
- Frontmatter
- Contents
- Preface
- Nomenclature
- Abbreviations
- Figure Acknowledgements
- 1 Introduction
- 2 Propulsive Power
- 3 Components of Hull Resistance
- 4 Model-Ship Extrapolation
- 5 Model-Ship Correlation
- 6 Restricted Water Depth and Breadth
- 7 Measurement of Resistance Components
- 8 Wake and Thrust Deduction
- 9 Numerical Estimation of Ship Resistance
- 10 Resistance Design Data
- 11 Propulsor Types
- 12 Propeller Characteristics
- 13 Powering Process
- 14 Hull Form Design
- 15 Numerical Methods for Propeller Analysis
- 16 Propulsor Design Data
- 17 Applications
- Appendix A1 Background Physics
- Appendix A2 Derivation of Eggers Formula for Wave Resistance
- Appendix A3 Tabulations of Resistance Design Data
- Appendix A4 Tabulations of Propulsor Design Data
- Index
- References
Summary
Propeller Geometry, Coefficients, Characteristics
Propeller Geometry
A marine propeller consists of a number of blades (2–7) mounted on a boss, Figure 12.1. Normal practice is to cast the propeller in one piece. For special applications, built-up propellers with detachable blades may be employed, such as for controllable pitch propellers or when the blades are made from composite materials.
The propeller is defined in relation to a generator line, sometimes referred to as the directrix, Figure 12.1. This line may be drawn at right angles to the shaft line, but more normally it is raked. For normal applications, blades are raked aft to provide the best clearance in the propeller aperture. For high-speed craft, the blades may be raked forward to balance bending moments due to centrifugal forces against those due to thrust loading.
- Type
- Chapter
- Information
- Ship Resistance and PropulsionPractical Estimation of Propulsive Power, pp. 261 - 295Publisher: Cambridge University PressPrint publication year: 2011
References
Some experiments on cavitation inception with propellers in the NSMB-Depressurised towing tankInternational Shipbuilding Progress 23 1976CrossRefGoogle Scholar
2002
1991
Performance of a family of surface piercing propellersTransactions of The Royal Institution of Naval Architects 144 2002 63Google Scholar
2005 Report of Specialist Comitteee on Azimuthing Podded PropulsorsProceedings of 24th ITTCEdinburgh 2005Google Scholar
Report of Specialist Comitteee on Azimuthing Podded PropulsorsProceedings of 25th ITTCFukuoka 2008Google Scholar
Report of Specialist Committee on Validation of Waterjet Test ProceduresProceedings of 23rd ITTCVenice 2002Google Scholar
Report of Specialist Committee on Validation of Waterjet Test ProceduresProceedings of 24th ITTCEdinburgh 2005Google Scholar
Results of systematic tests with vertical axis propellersInternational Shipbuilding Progress 13 1966CrossRefGoogle Scholar
Non-conventional propulsion devicesInternational Shipbuilding Progress 20 1973 173CrossRefGoogle Scholar
Paddle wheels. Part I, Preliminary model experimentsTransactions, Institute of Engineers and Shipbuilders in Scotland 98 1954 327Google Scholar
Paddle wheels. Part II, Systematic model experimentsTransactions, Institute of Engineers and Shipbuilders in Scotland 99 1955 467Google Scholar
Paddle wheels. Parts IIa, III, Further model experiments and ship model correlationTransactions, Institute of Engineers and Shipbuilders in Scotland 100 1956 505Google Scholar
Effect of cavitation on the performance of a series of 16 in. model propellersTransactions of the Royal Institution of Naval Architects 99 1957 690Google Scholar
Propeller cavitation: Further tests on 16in. propeller models in the King's College cavitation tunnelTransactions North East Coast Institution of Engineers and Shipbuilders 79 1962 295Google Scholar
Propeller cavitation. Systematic series of tests on five and six bladed model propellersTransactions of the Society of Naval Architects and Marine Engineers 75 1967 224Google Scholar
Propeller design and model experimentsTransactions North East Coast Institution of Engineers and Shipbuilders 94 1978 199Google Scholar
A new method for the analysis of unsteady propeller cavitation and hull surface pressuresTransactions of the Royal Institution of Naval Architects 127 1985 153Google Scholar
Measurements and predictions of forces, pressures and cavitation on 2-D sections sutable for marine current turbinesProceedings of Institution of Mechanical Engineers 218 2004Google Scholar
Xfoil: an analysis and design system for low Reynolds number aerofoilsConference on Low Reynolds Number Airfoil AerodynamicsUniversity of Notre DameNotre Dame 1989Google Scholar
Propeller skew as a means of improving cavitation performanceTransactions of the Royal Institution of Naval Architects 137 1995 53Google Scholar
Strength of propellersTransactions of the Royal Institution of Naval Architects 103 1961 139Google Scholar
The prediction of marine propeller distortion and stresses using a superparametric thick-shell finite-element methodTransactions of the Royal Institution of Naval Architects 115 1973 359Google Scholar
A practical stress analysis procedure for marine propellers using finite elements75 Propeller Symposium 1975Google Scholar
On the strength of highly skewed propellersPropellers/Shafting’91 SymposiumVirginia BeachVA 1991Google Scholar
On the choice of method for the calculation of stress in marine propellersTransactions of the Royal Institution of Naval Architects 110 1968 447Google Scholar
The Wageningen B-screw seriesTransactions of the Society of Naval Architects and Marine Engineers 77 1969 269Google Scholar
Formulation of propeller blade strengthTransactions of the Society of Naval Architects and Marine Engineers 71 1963 81Google Scholar