1.
Abeil, Bastien
Experimental determination of water motions inside a moonpool Conference
Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering OMAE2017 , 2017.
@conference{Abeil2017,
title = {Experimental determination of water motions inside a moonpool},
author = {Bastien Abeil },
url = {http://www.marin.nl/web/Publications/Publication-items/Experimental-determination-of-water-motions-inside-a-moonpool.htm},
year = {2017},
date = {2017-06-25},
booktitle = {Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering OMAE2017
},
abstract = {The substantial water motions that can occur inside a moonpool when a ship is operating in a formed sea represent a critical issue for operators, as they imply an interruption of subsea activities (e.g. delay in ROV deployment) or even a threat to the survival of the equipment placed inside or around the moonpool (e.g. riser connected to a BOP). In a perspective of reducing downtime caused by moonpool inactivity, substantial effort has been made over the past year to better understand the circumstances of such water dynamics and devise mitigation measures. Works of among others Fukuda [1] or Molin [2] show that the moonpool motions can be described as either piston mode, in other words a vertical displacement of the water column, or as horizontal sloshing modes, which natural frequencies can be approximated by closed-form expressions involving moonpool geometry and draught. The effect of damping devices, such as side wall flanges, has been widely investigated, notable publications include those of Fukuda [1] and Aalbers [3].
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
The substantial water motions that can occur inside a moonpool when a ship is operating in a formed sea represent a critical issue for operators, as they imply an interruption of subsea activities (e.g. delay in ROV deployment) or even a threat to the survival of the equipment placed inside or around the moonpool (e.g. riser connected to a BOP). In a perspective of reducing downtime caused by moonpool inactivity, substantial effort has been made over the past year to better understand the circumstances of such water dynamics and devise mitigation measures. Works of among others Fukuda [1] or Molin [2] show that the moonpool motions can be described as either piston mode, in other words a vertical displacement of the water column, or as horizontal sloshing modes, which natural frequencies can be approximated by closed-form expressions involving moonpool geometry and draught. The effect of damping devices, such as side wall flanges, has been widely investigated, notable publications include those of Fukuda [1] and Aalbers [3].
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.
2017
Abeil, Bastien
Experimental determination of water motions inside a moonpool Conference
Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering OMAE2017 , 2017.
Abstract | Links | BibTeX | Tags: damping, drillship, moonpool, SMB
@conference{Abeil2017,
title = {Experimental determination of water motions inside a moonpool},
author = {Bastien Abeil },
url = {http://www.marin.nl/web/Publications/Publication-items/Experimental-determination-of-water-motions-inside-a-moonpool.htm},
year = {2017},
date = {2017-06-25},
booktitle = {Proceedings of the ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering OMAE2017
},
abstract = {The substantial water motions that can occur inside a moonpool when a ship is operating in a formed sea represent a critical issue for operators, as they imply an interruption of subsea activities (e.g. delay in ROV deployment) or even a threat to the survival of the equipment placed inside or around the moonpool (e.g. riser connected to a BOP). In a perspective of reducing downtime caused by moonpool inactivity, substantial effort has been made over the past year to better understand the circumstances of such water dynamics and devise mitigation measures. Works of among others Fukuda [1] or Molin [2] show that the moonpool motions can be described as either piston mode, in other words a vertical displacement of the water column, or as horizontal sloshing modes, which natural frequencies can be approximated by closed-form expressions involving moonpool geometry and draught. The effect of damping devices, such as side wall flanges, has been widely investigated, notable publications include those of Fukuda [1] and Aalbers [3].
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.},
keywords = {damping, drillship, moonpool, SMB},
pubstate = {published},
tppubtype = {conference}
}
The substantial water motions that can occur inside a moonpool when a ship is operating in a formed sea represent a critical issue for operators, as they imply an interruption of subsea activities (e.g. delay in ROV deployment) or even a threat to the survival of the equipment placed inside or around the moonpool (e.g. riser connected to a BOP). In a perspective of reducing downtime caused by moonpool inactivity, substantial effort has been made over the past year to better understand the circumstances of such water dynamics and devise mitigation measures. Works of among others Fukuda [1] or Molin [2] show that the moonpool motions can be described as either piston mode, in other words a vertical displacement of the water column, or as horizontal sloshing modes, which natural frequencies can be approximated by closed-form expressions involving moonpool geometry and draught. The effect of damping devices, such as side wall flanges, has been widely investigated, notable publications include those of Fukuda [1] and Aalbers [3].
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.
State-of-the-art prediction of moonpool flows has undergone some significant changes over the last years. Away from analytical formulations (Aalbers [3]) and potential flow, the industry is nowadays moving towards the more advanced viscous flow methods, which allow a more complete description of the flow phenomena. Scale model tests are still conducted for numerical validation and final design verification.
A glance at the available litterature concerning moonpool flows learns that fully disclosed, well-documented experimental work is unfortunately little available, albeit crucial for numerical method validation. The present paper attemps to fill in this gap by presenting and discussing in detail the preparations and results of a model test campaign performed on a generic drillship model. Because all tests were conducted in waves, most of them at zero speed, the campaign focused on the measurement of water motions in typical operational conditions.
The following sections provide a complete description of the scale model, including body plan and loading condition, a presentation of the testing facility, testing set-up and measuring equipment and finally a detailed description and discussion of the test results.