Dejan Radojcic - Academia.edu (original) (raw)
Papers by Dejan Radojcic
SpringerBriefs in Applied Sciences and Technology, Aug 26, 2018
Design of Contemporary Inland Waterway Vessels, 2021
Presented is a nonlinear constrained optimization technique applied to optimal propeller design a... more Presented is a nonlinear constrained optimization technique applied to optimal propeller design at the preliminary design stage. The optimization method used is Sequential Unconstrained Minimization Technique - SUMT, which can treat equality and inequality, or only inequality constraints. Both approaches are shown. Application is given for Wageningen B-series and Gawn series propellers. The problem is solved on an Apple II microcomputer. One of the advantages of treating the constrained problem is that the user's knowledge about propellers is not essential, the process is automatic. More realistic propellers are found when design constraints such as D subscript max, N subscript min, and/or Ae/Ao subscript min are applied. Treating blade area ratio as an independent variable shows that, for some cases, higher BAR may be a better choice than lower BAR value.
Reflections on Power Prediction Modeling of Conventional High-Speed Craft, 2018
Note that there are different ways how R T * is split into its components; see for instance, Müll... more Note that there are different ways how R T * is split into its components; see for instance, Müller-Graf (1981, 1997a) and Savitsky (1981) for round bilge semi-displacement and hard chine planing hulls, respectively. For better insights of both resistance components and hull-propeller interaction, see ITTC (2011) "Recommended Procedures and Guidelines for High Speed Marine Vehicles". Practical and up-to-date recommendations for the evaluation of various additional components, as well as step-by-step HSC powering procedures, are discussed in the Blount book (2014).
... Title: An approximate method for calculation of resistance and trim of the planing hulls. Aut... more ... Title: An approximate method for calculation of resistance and trim of the planing hulls. Authors: Radojcic, D Southampton Univ. (United Kingdom). ... Keywords: An approximate method for calculation of resistance and trim of the planing hulls [ Hull design model]. Issue Date: 1985. ...
Reflections on Power Prediction Modeling of Conventional High-Speed Craft, 2019
The original version of the book was inadvertently published without incorporating the following ... more The original version of the book was inadvertently published without incorporating the following corrections: In Chapter 1, Page 1, paragraph starting with the text: "The core of these work … required for design optimization" is repeated below. So the first instance should be deleted and the second one should be retained. In Chapter 3, Tables 3.1, 3.2 and 3.3 need to be used in same formatting, either in portrait or in landscape. In Chapter 4, Page 58, the symbol "v" should be replaced with "v" in three of the occurrences. The correction chapters and the book have been updated with the changes.
Springer eBooks, 2021
Various aspects that influence the design of contemporary Danube vessels are discussed in Part I.... more Various aspects that influence the design of contemporary Danube vessels are discussed in Part I. Shallow water hydrodynamics and design guidelines are given in Part II.
Springer eBooks, 2021
Some carried out researched projects concern the innovative vessels whose time, seems, did not co... more Some carried out researched projects concern the innovative vessels whose time, seems, did not come yet due to various reasons; or did, but the vessels never became fully operational. Beside necessary costs for the development of a new concept, amongst the reasons are that innovations are not so easily accepted by the rather conservative IW shipping society.
Mathematical models for prediction of bare hull resistance and propeller's open water efficiency ... more Mathematical models for prediction of bare hull resistance and propeller's open water efficiency have been outlined in Chaps. 8 and 9, respectively. These parameters are order of magnitude more significant than other HSC powering components and as such are the focus of this book. Nevertheless, accurate power prediction involves other resistance and propulsion components, and hence a few approximate methods, as well as worked examples, for the prediction of these factors are also given in this chapter. The current section consists of four parts, following similar logic as was used in Chap. 5: • Section 10.1.1 presents the empirical equations for evaluation of appendage resistance (Note: Appendage lift is assumed to be negligible) Electronic supplementary material The online version of this chapter (
Springer eBooks, 2021
From the hydrodynamic viewpoint, the two main differences between the IW vessels and conventional... more From the hydrodynamic viewpoint, the two main differences between the IW vessels and conventional seagoing ships should be emphasized:
Springer eBooks, 2019
The use of general descriptive names, registered names, trademarks, service marks, etc. in this p... more The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.
Power Prediction Modeling of Conventional High-Speed Craft, 2019
Design of Contemporary Inland Waterway Vessels, 2021
This chapter is unalike to others as it is conceived to be a kind of a manual or a handbook consi... more This chapter is unalike to others as it is conceived to be a kind of a manual or a handbook consisting of some essential expressions and design guidelines specific for IW vessels.
Design of Contemporary Inland Waterway Vessels, 2021
IMO’s Marine Environment Protection Committee MEPC (IMO 2009a) developed measures to enhance ener... more IMO’s Marine Environment Protection Committee MEPC (IMO 2009a) developed measures to enhance energy efficiency in international shipping and thereby reduce greenhouse gas emissions. These are technical and operational measures as well as possible market-based instruments. The following indicators were introduced:
Power Prediction Modeling of Conventional High-Speed Craft, 2019
Mathematical models for prediction of bare hull resistance and propeller's open water efficiency ... more Mathematical models for prediction of bare hull resistance and propeller's open water efficiency have been outlined in Chaps. 8 and 9, respectively. These parameters are order of magnitude more significant than other HSC powering components and as such are the focus of this book. Nevertheless, accurate power prediction involves other resistance and propulsion components, and hence a few approximate methods, as well as worked examples, for the prediction of these factors are also given in this chapter. The current section consists of four parts, following similar logic as was used in Chap. 5: • Section 10.1.1 presents the empirical equations for evaluation of appendage resistance (Note: Appendage lift is assumed to be negligible) Electronic supplementary material The online version of this chapter (
SpringerBriefs in Applied Sciences and Technology, Aug 26, 2018
Design of Contemporary Inland Waterway Vessels, 2021
Presented is a nonlinear constrained optimization technique applied to optimal propeller design a... more Presented is a nonlinear constrained optimization technique applied to optimal propeller design at the preliminary design stage. The optimization method used is Sequential Unconstrained Minimization Technique - SUMT, which can treat equality and inequality, or only inequality constraints. Both approaches are shown. Application is given for Wageningen B-series and Gawn series propellers. The problem is solved on an Apple II microcomputer. One of the advantages of treating the constrained problem is that the user's knowledge about propellers is not essential, the process is automatic. More realistic propellers are found when design constraints such as D subscript max, N subscript min, and/or Ae/Ao subscript min are applied. Treating blade area ratio as an independent variable shows that, for some cases, higher BAR may be a better choice than lower BAR value.
Reflections on Power Prediction Modeling of Conventional High-Speed Craft, 2018
Note that there are different ways how R T * is split into its components; see for instance, Müll... more Note that there are different ways how R T * is split into its components; see for instance, Müller-Graf (1981, 1997a) and Savitsky (1981) for round bilge semi-displacement and hard chine planing hulls, respectively. For better insights of both resistance components and hull-propeller interaction, see ITTC (2011) "Recommended Procedures and Guidelines for High Speed Marine Vehicles". Practical and up-to-date recommendations for the evaluation of various additional components, as well as step-by-step HSC powering procedures, are discussed in the Blount book (2014).
... Title: An approximate method for calculation of resistance and trim of the planing hulls. Aut... more ... Title: An approximate method for calculation of resistance and trim of the planing hulls. Authors: Radojcic, D Southampton Univ. (United Kingdom). ... Keywords: An approximate method for calculation of resistance and trim of the planing hulls [ Hull design model]. Issue Date: 1985. ...
Reflections on Power Prediction Modeling of Conventional High-Speed Craft, 2019
The original version of the book was inadvertently published without incorporating the following ... more The original version of the book was inadvertently published without incorporating the following corrections: In Chapter 1, Page 1, paragraph starting with the text: "The core of these work … required for design optimization" is repeated below. So the first instance should be deleted and the second one should be retained. In Chapter 3, Tables 3.1, 3.2 and 3.3 need to be used in same formatting, either in portrait or in landscape. In Chapter 4, Page 58, the symbol "v" should be replaced with "v" in three of the occurrences. The correction chapters and the book have been updated with the changes.
Springer eBooks, 2021
Various aspects that influence the design of contemporary Danube vessels are discussed in Part I.... more Various aspects that influence the design of contemporary Danube vessels are discussed in Part I. Shallow water hydrodynamics and design guidelines are given in Part II.
Springer eBooks, 2021
Some carried out researched projects concern the innovative vessels whose time, seems, did not co... more Some carried out researched projects concern the innovative vessels whose time, seems, did not come yet due to various reasons; or did, but the vessels never became fully operational. Beside necessary costs for the development of a new concept, amongst the reasons are that innovations are not so easily accepted by the rather conservative IW shipping society.
Mathematical models for prediction of bare hull resistance and propeller's open water efficiency ... more Mathematical models for prediction of bare hull resistance and propeller's open water efficiency have been outlined in Chaps. 8 and 9, respectively. These parameters are order of magnitude more significant than other HSC powering components and as such are the focus of this book. Nevertheless, accurate power prediction involves other resistance and propulsion components, and hence a few approximate methods, as well as worked examples, for the prediction of these factors are also given in this chapter. The current section consists of four parts, following similar logic as was used in Chap. 5: • Section 10.1.1 presents the empirical equations for evaluation of appendage resistance (Note: Appendage lift is assumed to be negligible) Electronic supplementary material The online version of this chapter (
Springer eBooks, 2021
From the hydrodynamic viewpoint, the two main differences between the IW vessels and conventional... more From the hydrodynamic viewpoint, the two main differences between the IW vessels and conventional seagoing ships should be emphasized:
Springer eBooks, 2019
The use of general descriptive names, registered names, trademarks, service marks, etc. in this p... more The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.
Power Prediction Modeling of Conventional High-Speed Craft, 2019
Design of Contemporary Inland Waterway Vessels, 2021
This chapter is unalike to others as it is conceived to be a kind of a manual or a handbook consi... more This chapter is unalike to others as it is conceived to be a kind of a manual or a handbook consisting of some essential expressions and design guidelines specific for IW vessels.
Design of Contemporary Inland Waterway Vessels, 2021
IMO’s Marine Environment Protection Committee MEPC (IMO 2009a) developed measures to enhance ener... more IMO’s Marine Environment Protection Committee MEPC (IMO 2009a) developed measures to enhance energy efficiency in international shipping and thereby reduce greenhouse gas emissions. These are technical and operational measures as well as possible market-based instruments. The following indicators were introduced:
Power Prediction Modeling of Conventional High-Speed Craft, 2019
Mathematical models for prediction of bare hull resistance and propeller's open water efficiency ... more Mathematical models for prediction of bare hull resistance and propeller's open water efficiency have been outlined in Chaps. 8 and 9, respectively. These parameters are order of magnitude more significant than other HSC powering components and as such are the focus of this book. Nevertheless, accurate power prediction involves other resistance and propulsion components, and hence a few approximate methods, as well as worked examples, for the prediction of these factors are also given in this chapter. The current section consists of four parts, following similar logic as was used in Chap. 5: • Section 10.1.1 presents the empirical equations for evaluation of appendage resistance (Note: Appendage lift is assumed to be negligible) Electronic supplementary material The online version of this chapter (