Transcript Oil Sea Harvester Project OSH design : Hydrodynamics and Optimisation

Oil Sea Harvester Project
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
OSH design :
Hydrodynamics and Optimisation
Partners involved :
• CAT Shipyard (FR) : Design
• BEC hydrodynamic laboratory (FR) : Numerical optimisation
• CEHIPAR hydrodynamic laboratory (SP) : Test campaigns
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
OIL SEA HARVESTER
TST4-CT-2004-516230
General Objective :
Optimisation of the operational
performances of the OSH concept
www.osh-project.org
• Transit phase
– Powering performances : relatively high transit speed
– Sea-keeping behaviour : low dynamic responses
• Oil recovery Phase
– Sea-keeping behaviour for oil recovery operations up to sea state 6/7
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
Transit phase : powering optimisation
OIL SEA HARVESTER
Resistance
TST4-CT-2004-516230
• Objective :
www.osh-project.org
– Light displacement (8000 t)
– Minimise the ship resistance at 25 knots
– Minimise all hydrodynamic interactions
at medium speeds
10
15
20
Speed [kt]
• Constraints :
– Pods integration (immersion of the transom stern)
– central cylindrical part of the main hull not modified
– Lateral distance between the side hull and the main hull not
modified (toll carriage and oil recovery tool integration)
• Design parameters :
– Main hull
– Side hull
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
25
30
Powering optimisation : Main hull modifications
Initial
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
•
•
•
Final
Bow sections : thinner waterline
Buttock line and transom immersion
Bulbous bow
Initial form
Initial
Final
Initial
Final
Optimal
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
Powering optimisation : Side hull modifications
OIL SEA HARVESTER
TST4-CT-2004-516230
•
•
Best length : 101m (initial)
Best longitudinal location : fore
AP
FP
Main hull
www.osh-project.org
Side hull
Best compromise between bow wave interactions
and stern wave interactions
80 m
19 knots
25 knots
Initial
side hull
101 m
2.0E+06
Resistance [N]
Fore
Avant
-10
1.5E+06
-20
Aft
Arrière
1.0E+06
120 m
138 m
5.0E+05
0.0E+00
OSH
PMC MEETING N°7
12
14
16
9th June 2006, Athens (GR)
18
20
Speed [kt]
22
24
26
28
Sea-keeping optimisation
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
• Objective : sea-keeping performances
– Transit phase :
V ≈20 knots -  = 8 000 t
Tool carriage in folded position
– Oil recovery operations :
V : low speed
 = 12 000 t
Tool carriage deployed
• Constraints :
– Pods integration
– cylindrical part of the main hull not modified
– distance between the side hull and the main hull
not modified (tool carriage integration)
• Design parameters :
– Side hull
– Tool carriage
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
Seakeeping optimisation for
oil recovery operations (Transit phase not critical)
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
•
•
•
•
Increase of the side hull diameter : 3.5m (instead of 3m)
No influence of the longitudinal position of the side hulls
Optimal length of the tool carriage : 11.5m
Optimal location of the tool carriage : middle of the side hull
Head waves (180°)
8m
180
210
Example of results :
Operability diagram for 4 lengths :
operability index (0-100%) versus wave heading
240
255
270
18 m
135
120
105
90
285
75
300
60
315
45
30
345
15
0
Following waves (0°)
PMC MEETING N°7
15 m
150
330
OSH
11.5 m
165
9th June 2006, Athens (GR)
Beam starboard waves (90°)
Influence of the length of the tool carriage
on the oil recovery performances
Beam portsaide waves (270°)
225
195 100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Optimal design
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
•
•
•
•
•
Thinner bow sections
Maximum transom immersion
(Bulbous bow)
Side hulls of length 101m at extreme fore location
Tool carriage of length 11.5m located in the middle of the side hull
Head waves (180°)
Initial
Optimal
180
210
240
255
270
165
150
135
120
105
90
285
75
300
60
315
45
330
30
345
15
0
Following waves (0°)
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
Beam starboard waves (90°)
Beam portsaide waves (270°)
225
195 100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Tank tests in progress (task 5.3)
- assessment of the design optimised numerically
- calibration of the numerical tools (re-used for the
final design stage)
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
Resistance tests almost completed
30
Trim 0m
– Great importance of the static trim
(transom immersion)
– Optimal location of the side hull : fore
Resistance [kg]
25
Ship resistance (model)
30
Fore position
25
Resistance [kg]
•
Ship resistance (model)
Trim 2m
Trim 4m
20
15
10
5
5m aft
10m aft
20
0
0.0
0.5
1.0
15
1.5
Speed [m/s]
2.0
2.5
3.0
Influence of the static trim
10
5
0
0.0
0.5
1.0
1.5
Speed [m/s]
2.0
2.5
Influence of the longitudinal Side hull location
OSH
PMC MEETING N°7
3.0
•
Seakeeping tests carried out from June to
September 06
9th June 2006, Athens (GR)
OIL SEA HARVESTER
TST4-CT-2004-516230
www.osh-project.org
Thank you for your attention
OSH
PMC MEETING N°7
9th June 2006, Athens (GR)
Seakeeping optimisation
Statistiques du Golfe de Gascogne
OIL SEA HARVESTER
www.osh-project.org
Definition of the operability value
Transit phase
Significant wave height (m)
•
•
TST4-CT-2004-516230
– Roll < 12°
– Pitch < 4.5°
– Vertical acceleration < 3m/s²
•
Oil recovery operations
– Wave elevation < 1m
– Relative heave < 3m
– Vertical acceleration < 3m/s²
0.0
0.1
0.2
0.2
0.1
0.1
0.0
PilRel
0.0
0.0
0.1
0.1
0.1
0.0
0.0
0.0
0.1
0.1
0.2
Zacc
0.1
0.2
0.1
0.0
0.0
0.0
0.0
0.1
0.2
0.3
0.3
0.2
0.1
SS 0.0
8
0.0
0.0
0.2
0.4
0.5
0.4
0.2
0.1
0.0
0.0
0.1
0.4
0.8
1.0
0.7
0.4
0.1
0.0
0.0
0.2
0.8
1.6
1.7
1.2
0.6
0.2
0.1
0.0
0.4
1.8
3.2
3.1
2.0
0.9
0.3
SS 0.1
7
0.0
0.1
1.1
4.0
6.5
5.8
3.4
1.5
0.5
0.1
0.0
0.3
2.9
9.3
13.3
10.7
5.7
2.2
0.7
0.0
1.0
7.9
21.3
26.3
18.5
8.7
3.0
0.8
0.1
3.2
20.8
45.6
46.9
28.0
11.3
0.8
SS 0.2
5
0.0
0.5
10.3
48.9
81.6
65.6
71.8%
3.4
31.5
10.4
2.6
0.5
0.0
2.2
28.5
84.3
93.4
52.4
18.2
4.5
0.9
0.1
SS 4
0.4
8.9
34.1
43.3
24.8
7.9
1.7
0.3
0.0
0.0
<4
4-5
5-6
6-7
7-8
8-9 9-10 10-11 11-12 12-13 >13
Zero crossing period (s)
RelWave
Relative wave
Relative wave100%
Relative wave
90%
Relative wave
Relative wave
80%
Relative heave
Relative wave
70%
60%
Vertical acceleration
Relative heave
50%
40%
30%
Vertical acceleration
Relative heave
20%
10%
Vertical acceleration
0%
Relative heave
Quantity of oil spilled (tonnes) :
Vertical acceleration
Relative heave
Relative heave
50 to 500
Relative heave
500 to 10 000
Relative wave
Relative wave
Relative wave
PMC MEETING N°7
Relative wave
Relative wave
> 10 000
Relative heave
Relative wave
OSH
0.2
SS 6
0.2
0.1
0.0
Head waves (180°)
Beam portsaide waves (270°)
Maximum significant height
Operability diagramm
0.0
9th June 2006, Athens (GR)Following waves (0°)
Beam starboard waves (90°)
•
•
>14
13-14
12-13
11-12
10-11
9-10
8-9
7-8
6-7
5-6
4-5
3-4
2-3
1-2
0-1
Seakeeping optimisation
OIL SEA HARVESTER
Transit phase
TST4-CT-2004-516230
www.osh-project.org
•
•
Better performances than in oil recovery operations
No need to optimise
Head waves (180°)
Oil recovery
Transit
180
210
240
255
270
165
150
135
120
60
Beam starboard waves (90°)
Beam portsaide waves (270°)
225
195 100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
15
0
Following waves (0°)
9th June 2006, Athens
(GR)
105
90
285
75
300
315
45
330
30
345
OSH
PMC MEETING N°7
Seakeeping optimisation
OIL SEA HARVESTER
Oil recovery operations
TST4-CT-2004-516230
•
•
•
•
Increase of the side hull diameter :3.5m
No influence of the longitudinal position of the side hulls
Optimal length of the tool carriage : 11.5m
Optimal location of the tool carriage : middle if the side hull
Head waves (180°)
210
255
270
120
105
90
285
75
60
315
45
330
30
345
15
0
Following waves (0°)
OSH
18 m
135
300
Length of the tool carriage
PMC MEETING N°7
210
225
240
255
270
195 100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
165
150
135
120
105
90
285
75
300
60
315
45
330
30
345
15
0
Following waves (0°)
Lngitudinal location of the side hulls
9th June 2006, Athens (GR)
Beam starboard waves (90°)
240
15 m
150
-16 m
-8 m
Initial
+10 m
+20 m
180
11.5 m
165
Beam starboard waves (90°)
Beam portsaide waves (270°)
225
195 100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
Head waves (180°)
8m
180
Beam portsaide waves (270°)
www.osh-project.org