Jie; Chen Dang, Hao
The Second Conference of Global Chinese Scholars on Hydrodynamics, CCSH'2016, 2016.
@conference{Dang2016,
title = {Energy Saving by Using Asymmetric Aftbodies for Merchant Ships – Design Methodology, Numerical Simulation and Validation},
author = {Dang, Jie; Chen, Hao},
url = {http://www.marin.nl/web/Publications/Papers/Energy-Saving-by-Using-Asymmetric-Aftbodies-for-Merchant-Ships-Design-Methodology-Numerical-Simulation-and-Validation.htm },
year = {2016},
date = {2016-11-11},
booktitle = {The Second Conference of Global Chinese Scholars on Hydrodynamics},
publisher = {CCSH'2016},
abstract = {The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational Fluid Dynamics (CFD) has been used to evaluate the powering performance through massive calculations with automatic deformation algorisms for the hull forms and the propeller blades. Comparative model tests of the designs to the optimized symmetric hull forms have been carried out to verify the efficiency gain. More than 6% improvement on the propulsive efficiency of an oil tanker has been measured during the model tests. Dedicated sea-trials show good agreement with the predicted performance from the test results.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Dang, Jie; Chen, Hao; Rueda, Luis; Willemsen, Harry
Fourth International Symposium on Marine Propulsors (SMP), Austin, Texas , Symposiums on Marine Propulsors 2015.
@conference{Dang2015,
title = {Integrated Design of Asymmetric Aftbody and Propeller for an Aframax Tanker to Maximize Energy Efficiency},
author = {Jie Dang and Hao Chen and Luis Rueda and Harry Willemsen},
url = {http://www.marin.nl/web/Publications/Papers/Integrated-Design-of-Asymmetric-Aftbody-and-Propeller-for-an-Aframax-Tanker-to-Maximize-Energy-Efficiency.htm
http://www.marinepropulsors.com/proceedings.php},
year = {2015},
date = {2015-06-01},
booktitle = {Fourth International Symposium on Marine Propulsors (SMP), Austin, Texas },
organization = {Symposiums on Marine Propulsors},
abstract = {With the implementation of the EEDI, energy saving and emission reduction of ships, especially merchant ships, become more and more important. To achieve high efficiency and low emissions, recently Energy Saving Devices (ESDs) have been re-studied and installed to many ships, both new buildings and also retrofits. Various ESDs, including new concepts, have been tested in model scale and large improvements on energy efficiency have been confirmed. However due to the fact that most ESDs are fitted in the wake field, the performance of the ESDs is influenced by scale effects. For the operators, the fouling and the structure integration of the ESD’s with the hull are the important issues to make decisions on applying ESDs to their ships.
Distinguished from the ESDs where extra ‘appendages’ have to be added in front of and/or behind a propeller, an asymmetric aftbody can also change the flow towards the propeller without appendages. The wake with pre-swirl generated by an asymmetric aftbody is in general more uniform than that by an ESD (such as a pre-stator with finite blades) and with almost no penalty on the ship’s resistance. By integrating a propeller, a ship with asymmetric aftbody can be designed so that the hull-propeller interaction is optimized for its total propulsive efficiency and the required shaft power is minimized at given speed.
In this paper, discussions have been given on the optimization procedure by using the Computational Fluid Dynamics (CFD) towards a fully-integrated hull-propeller design to maximize the energy efficiency of a single screw ship. Comparative model tests, carried out with optimized symmetric and asymmetric ships, showed more than 6% gain in efficiency with a moderate asymmetric aftbody, without detriments to its course stability. },
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Distinguished from the ESDs where extra ‘appendages’ have to be added in front of and/or behind a propeller, an asymmetric aftbody can also change the flow towards the propeller without appendages. The wake with pre-swirl generated by an asymmetric aftbody is in general more uniform than that by an ESD (such as a pre-stator with finite blades) and with almost no penalty on the ship’s resistance. By integrating a propeller, a ship with asymmetric aftbody can be designed so that the hull-propeller interaction is optimized for its total propulsive efficiency and the required shaft power is minimized at given speed.
In this paper, discussions have been given on the optimization procedure by using the Computational Fluid Dynamics (CFD) towards a fully-integrated hull-propeller design to maximize the energy efficiency of a single screw ship. Comparative model tests, carried out with optimized symmetric and asymmetric ships, showed more than 6% gain in efficiency with a moderate asymmetric aftbody, without detriments to its course stability.
van der Meij, Karola; Raven, Hoyte
Promising hydrodynamic improvements for inland vessels Conference
EIWN Conference, Budapest, Hungary, European Inland Waterway Navigation Conference , 2014.
@conference{Meij2014,
title = {Promising hydrodynamic improvements for inland vessels},
author = {Karola van der Meij and Hoyte Raven},
url = {http://www.marin.nl/web/Publications/Publication-items/Promising-Hydrodynamic-Improvements-for-Inland-Vessels-1.htm
},
year = {2014},
date = {2014-09-10},
booktitle = {EIWN Conference, Budapest, Hungary},
publisher = {European Inland Waterway Navigation Conference },
abstract = {In the EU project Move IT! and the Joint Industry Project SAVE, extensive CFD calculations have been performed for several existing inland vessels. The objective was to investigate possible retrofit options to improve the hydrodynamic performance, and to determine the potential reduction in fuel consumption. This paper presents the results of the CFD calculations performed for the vessels. Different bow shapes have been analysed and a detailed investigation was performed on the shape of the aftship, especially focussing on the tunnel design. Some of the improvements were very promising and provide an interesting basis for inland ship design in general.
},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Zondervan, Gert-Jan; Dang, Jie
MARIN spearheads propulsion improvements Journal Article
In: MARIN Report, no. 104, pp. 16-17, 2011.
@article{zondervan2011,
title = {MARIN spearheads propulsion improvements},
author = {Gert-Jan Zondervan and Jie Dang},
url = {http://www.marin.nl/web/Publications/Publication-items/MARIN-spearheads-propulsion-improvements.htm},
year = {2011},
date = {2011-12-01},
journal = {MARIN Report},
number = {104},
pages = {16-17},
abstract = {Fuel saving and emission reduction are motivating factors in the drive to improve marine propulsor technology and in the renewed interest in special devices that improve propulsion. Together with the industry, MARIN is actively investigating their working principles and the critical design aspects, using modern design and analysis tools.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Dang, Jie; Chen, Hao; Dong, Guoxiang; van der Ploeg, Auke; Hallmann, Rink; Mauro, Francesco
An Exploratory Study on the Working Principles of Energy Saving Devices (ESDs) Conference
Symposium on Green Ship Technology, Wuxi, China, October 201, Greenship'2011 2011.
@conference{Dang2011,
title = {An Exploratory Study on the Working Principles of Energy Saving Devices (ESDs)},
author = {Jie Dang and Hao Chen and Guoxiang Dong and Auke van der Ploeg and Rink Hallmann and Francesco Mauro},
url = {http://www.marin.nl/web/News/News-items/An-Exploratory-Study-on-the-Working-Principles-of-Energy-Saving-Devices-ESDs.htm},
year = {2011},
date = {2011-10-01},
booktitle = {Symposium on Green Ship Technology, Wuxi, China, October 201},
organization = {Greenship'2011},
abstract = { new Joint Industry Project (JIP) has been initiated recently by MARIN, called ESD-JILI (机理), looking into the working principles and scale effects on Energy Saving Devices (ESDs).
Three ESDs have been chosen for the investigations in the first phase. They were a preduct with a supporting stator in the duct, a pre-swirl stator with asymmetric blade design and Propeller Boss Cap Fins (PBCF). Measurements of forces and moments on all components of the ESDs have been carried out in selfpropulsion model tests with dedicated sensors. Particle Image Velocimetry (PIV) technique has been used in the investigation of the detailed flow around the ESDs. In order to investigate the scale effects in model tests, a fullscale wake field was approximated by a ‘smart ship model’. Computational Fluid Dynamics (CFD) calculations were carried out both for designing the smart ship model and also for the detailed flow around the ESDs. Some findings and fundamental issues on scale-effects of the ESDs are addressed in this paper. },
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Three ESDs have been chosen for the investigations in the first phase. They were a preduct with a supporting stator in the duct, a pre-swirl stator with asymmetric blade design and Propeller Boss Cap Fins (PBCF). Measurements of forces and moments on all components of the ESDs have been carried out in selfpropulsion model tests with dedicated sensors. Particle Image Velocimetry (PIV) technique has been used in the investigation of the detailed flow around the ESDs. In order to investigate the scale effects in model tests, a fullscale wake field was approximated by a ‘smart ship model’. Computational Fluid Dynamics (CFD) calculations were carried out both for designing the smart ship model and also for the detailed flow around the ESDs. Some findings and fundamental issues on scale-effects of the ESDs are addressed in this paper.
2016
Jie; Chen Dang, Hao
The Second Conference of Global Chinese Scholars on Hydrodynamics, CCSH'2016, 2016.
Abstract | Links | BibTeX | Tags: EEDI, efficiency, Energy Saving Device, ESD, Fuel consumption, full scale, measurement, sea trial, ship design
@conference{Dang2016,
title = {Energy Saving by Using Asymmetric Aftbodies for Merchant Ships – Design Methodology, Numerical Simulation and Validation},
author = {Dang, Jie; Chen, Hao},
url = {http://www.marin.nl/web/Publications/Papers/Energy-Saving-by-Using-Asymmetric-Aftbodies-for-Merchant-Ships-Design-Methodology-Numerical-Simulation-and-Validation.htm },
year = {2016},
date = {2016-11-11},
booktitle = {The Second Conference of Global Chinese Scholars on Hydrodynamics},
publisher = {CCSH'2016},
abstract = {The methodology and procedures are discussed on designing merchant ships to achieve fully-integrated and optimized hull-propulsion systems by using asymmetric aftbodies. Computational Fluid Dynamics (CFD) has been used to evaluate the powering performance through massive calculations with automatic deformation algorisms for the hull forms and the propeller blades. Comparative model tests of the designs to the optimized symmetric hull forms have been carried out to verify the efficiency gain. More than 6% improvement on the propulsive efficiency of an oil tanker has been measured during the model tests. Dedicated sea-trials show good agreement with the predicted performance from the test results.},
keywords = {EEDI, efficiency, Energy Saving Device, ESD, Fuel consumption, full scale, measurement, sea trial, ship design},
pubstate = {published},
tppubtype = {conference}
}
2015
Dang, Jie; Chen, Hao; Rueda, Luis; Willemsen, Harry
Fourth International Symposium on Marine Propulsors (SMP), Austin, Texas , Symposiums on Marine Propulsors 2015.
Abstract | Links | BibTeX | Tags: aframax, asymmetric aftbody, CFD, efficiency, Energy Saving Device, ESD, propeller, RANS-BEM, tanker
@conference{Dang2015,
title = {Integrated Design of Asymmetric Aftbody and Propeller for an Aframax Tanker to Maximize Energy Efficiency},
author = {Jie Dang and Hao Chen and Luis Rueda and Harry Willemsen},
url = {http://www.marin.nl/web/Publications/Papers/Integrated-Design-of-Asymmetric-Aftbody-and-Propeller-for-an-Aframax-Tanker-to-Maximize-Energy-Efficiency.htm
http://www.marinepropulsors.com/proceedings.php},
year = {2015},
date = {2015-06-01},
booktitle = {Fourth International Symposium on Marine Propulsors (SMP), Austin, Texas },
organization = {Symposiums on Marine Propulsors},
abstract = {With the implementation of the EEDI, energy saving and emission reduction of ships, especially merchant ships, become more and more important. To achieve high efficiency and low emissions, recently Energy Saving Devices (ESDs) have been re-studied and installed to many ships, both new buildings and also retrofits. Various ESDs, including new concepts, have been tested in model scale and large improvements on energy efficiency have been confirmed. However due to the fact that most ESDs are fitted in the wake field, the performance of the ESDs is influenced by scale effects. For the operators, the fouling and the structure integration of the ESD’s with the hull are the important issues to make decisions on applying ESDs to their ships.
Distinguished from the ESDs where extra ‘appendages’ have to be added in front of and/or behind a propeller, an asymmetric aftbody can also change the flow towards the propeller without appendages. The wake with pre-swirl generated by an asymmetric aftbody is in general more uniform than that by an ESD (such as a pre-stator with finite blades) and with almost no penalty on the ship’s resistance. By integrating a propeller, a ship with asymmetric aftbody can be designed so that the hull-propeller interaction is optimized for its total propulsive efficiency and the required shaft power is minimized at given speed.
In this paper, discussions have been given on the optimization procedure by using the Computational Fluid Dynamics (CFD) towards a fully-integrated hull-propeller design to maximize the energy efficiency of a single screw ship. Comparative model tests, carried out with optimized symmetric and asymmetric ships, showed more than 6% gain in efficiency with a moderate asymmetric aftbody, without detriments to its course stability. },
keywords = {aframax, asymmetric aftbody, CFD, efficiency, Energy Saving Device, ESD, propeller, RANS-BEM, tanker},
pubstate = {published},
tppubtype = {conference}
}
Distinguished from the ESDs where extra ‘appendages’ have to be added in front of and/or behind a propeller, an asymmetric aftbody can also change the flow towards the propeller without appendages. The wake with pre-swirl generated by an asymmetric aftbody is in general more uniform than that by an ESD (such as a pre-stator with finite blades) and with almost no penalty on the ship’s resistance. By integrating a propeller, a ship with asymmetric aftbody can be designed so that the hull-propeller interaction is optimized for its total propulsive efficiency and the required shaft power is minimized at given speed.
In this paper, discussions have been given on the optimization procedure by using the Computational Fluid Dynamics (CFD) towards a fully-integrated hull-propeller design to maximize the energy efficiency of a single screw ship. Comparative model tests, carried out with optimized symmetric and asymmetric ships, showed more than 6% gain in efficiency with a moderate asymmetric aftbody, without detriments to its course stability.
2014
van der Meij, Karola; Raven, Hoyte
Promising hydrodynamic improvements for inland vessels Conference
EIWN Conference, Budapest, Hungary, European Inland Waterway Navigation Conference , 2014.
Abstract | Links | BibTeX | Tags: CFD, efficiency, inland ship design, shallow water
@conference{Meij2014,
title = {Promising hydrodynamic improvements for inland vessels},
author = {Karola van der Meij and Hoyte Raven},
url = {http://www.marin.nl/web/Publications/Publication-items/Promising-Hydrodynamic-Improvements-for-Inland-Vessels-1.htm
},
year = {2014},
date = {2014-09-10},
booktitle = {EIWN Conference, Budapest, Hungary},
publisher = {European Inland Waterway Navigation Conference },
abstract = {In the EU project Move IT! and the Joint Industry Project SAVE, extensive CFD calculations have been performed for several existing inland vessels. The objective was to investigate possible retrofit options to improve the hydrodynamic performance, and to determine the potential reduction in fuel consumption. This paper presents the results of the CFD calculations performed for the vessels. Different bow shapes have been analysed and a detailed investigation was performed on the shape of the aftship, especially focussing on the tunnel design. Some of the improvements were very promising and provide an interesting basis for inland ship design in general.
},
keywords = {CFD, efficiency, inland ship design, shallow water},
pubstate = {published},
tppubtype = {conference}
}
2011
Zondervan, Gert-Jan; Dang, Jie
MARIN spearheads propulsion improvements Journal Article
In: MARIN Report, no. 104, pp. 16-17, 2011.
Abstract | Links | BibTeX | Tags: CFD, efficiency, ESD, Fuel consumption, propeller
@article{zondervan2011,
title = {MARIN spearheads propulsion improvements},
author = {Gert-Jan Zondervan and Jie Dang},
url = {http://www.marin.nl/web/Publications/Publication-items/MARIN-spearheads-propulsion-improvements.htm},
year = {2011},
date = {2011-12-01},
journal = {MARIN Report},
number = {104},
pages = {16-17},
abstract = {Fuel saving and emission reduction are motivating factors in the drive to improve marine propulsor technology and in the renewed interest in special devices that improve propulsion. Together with the industry, MARIN is actively investigating their working principles and the critical design aspects, using modern design and analysis tools.},
keywords = {CFD, efficiency, ESD, Fuel consumption, propeller},
pubstate = {published},
tppubtype = {article}
}
Dang, Jie; Chen, Hao; Dong, Guoxiang; van der Ploeg, Auke; Hallmann, Rink; Mauro, Francesco
An Exploratory Study on the Working Principles of Energy Saving Devices (ESDs) Conference
Symposium on Green Ship Technology, Wuxi, China, October 201, Greenship'2011 2011.
Abstract | Links | BibTeX | Tags: CFD, duct, efficiency, Energy Saving Device, ESD, ESD-JILI, PBCF, PIV, stator
@conference{Dang2011,
title = {An Exploratory Study on the Working Principles of Energy Saving Devices (ESDs)},
author = {Jie Dang and Hao Chen and Guoxiang Dong and Auke van der Ploeg and Rink Hallmann and Francesco Mauro},
url = {http://www.marin.nl/web/News/News-items/An-Exploratory-Study-on-the-Working-Principles-of-Energy-Saving-Devices-ESDs.htm},
year = {2011},
date = {2011-10-01},
booktitle = {Symposium on Green Ship Technology, Wuxi, China, October 201},
organization = {Greenship'2011},
abstract = { new Joint Industry Project (JIP) has been initiated recently by MARIN, called ESD-JILI (机理), looking into the working principles and scale effects on Energy Saving Devices (ESDs).
Three ESDs have been chosen for the investigations in the first phase. They were a preduct with a supporting stator in the duct, a pre-swirl stator with asymmetric blade design and Propeller Boss Cap Fins (PBCF). Measurements of forces and moments on all components of the ESDs have been carried out in selfpropulsion model tests with dedicated sensors. Particle Image Velocimetry (PIV) technique has been used in the investigation of the detailed flow around the ESDs. In order to investigate the scale effects in model tests, a fullscale wake field was approximated by a ‘smart ship model’. Computational Fluid Dynamics (CFD) calculations were carried out both for designing the smart ship model and also for the detailed flow around the ESDs. Some findings and fundamental issues on scale-effects of the ESDs are addressed in this paper. },
keywords = {CFD, duct, efficiency, Energy Saving Device, ESD, ESD-JILI, PBCF, PIV, stator},
pubstate = {published},
tppubtype = {conference}
}
Three ESDs have been chosen for the investigations in the first phase. They were a preduct with a supporting stator in the duct, a pre-swirl stator with asymmetric blade design and Propeller Boss Cap Fins (PBCF). Measurements of forces and moments on all components of the ESDs have been carried out in selfpropulsion model tests with dedicated sensors. Particle Image Velocimetry (PIV) technique has been used in the investigation of the detailed flow around the ESDs. In order to investigate the scale effects in model tests, a fullscale wake field was approximated by a ‘smart ship model’. Computational Fluid Dynamics (CFD) calculations were carried out both for designing the smart ship model and also for the detailed flow around the ESDs. Some findings and fundamental issues on scale-effects of the ESDs are addressed in this paper.