Systematic Approach to Develop an Optimized Nozzle Design for … · 2017. 10. 19. · DYNAMIC...
Transcript of Systematic Approach to Develop an Optimized Nozzle Design for … · 2017. 10. 19. · DYNAMIC...
DYNAMIC POSITIONING CONFERENCEOCTOBER 9‐11, 2017
THRUSTERS
Systematic Approach to Develop an Optimized Nozzle Design for Up to Date and Future Demands
Jan Glas, Klau Tweddel, Lutz MüllerSchottel
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DUCTED PROPELLER
SYSTEMATIC APPROACH TO DEVELOP AN OPTIMIZED NOZZLE DESIGN FOR UP TO DATE AND FUTURE DEMANDS
Müller, Tweddell, Glas 10.10.2017
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Content
01 Introduction
02 Nozzle Optimization
Optimization Technique / Approach
Market Study / Predesign
Parameterization
Design Process / Tools
Model Tests
03 Results
04 Integrated Anode Concept
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Content
01 Introduction
02 Nozzle Optimization
Optimization Technique / Approach
Market Study / Predesign
Parameterization
Design Process / Tools
Model Tests
03 Results
04 Integrated Anode Concept
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01 Introduction>> Background
Principal use:
Nozzle used to increase thrust at low speed operation
nozzle profile
Performance:
highly dependant on nozzle profile
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01 Introduction>>Application Requirements
DP-Performance (~0-2kn) Towing (~3-6kn)
BP-Performance (0kn)
Free-Sailing (~10-12kn)
Shipspeed
Free-Sailing+ (>12kn)
Bollard-Pull DP-Operation
Towing
Free-Sailing +Free-Sailing
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01 Introduction>> New Development >>Objectives
New development, design objective:
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01 Introduction>> New Development >>Objectives
Requirements for the new compromise duct:
suitable for a wide range of various applications
improved free running performance (fuel economy)
minimized space for installation
identical bollard pull as standard nozzle WAG19A-mod
?…which nozzle design???
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Content
01 Introduction
02 Nozzle Optimization
Optimization Technique / Approach
Market Study / Predesign
Parameterization
Design Process / Tools
Model Tests
03 Results
04 Integrated Anode Concept
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02 Nozzle Optimization>> Optimization Technique
Optimization TechniqueTraditional:Modeltest, Experiments
Virtual Product Development: Computer Simulations,„Virtual Experiments“
Modeltest
Towing Tank
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02 Nozzle Optimization>> Approach
Virtual Product Development:
Phase VIPhase III
Phase II: determine optimal nozzle design with computer simulationsPhase III: verify optimized performance in model testPhase VI: check full scale performance
Phase I: Suitable selection of nozzle geometries / parametriziation
Phase IIPhase I
Prototype modell testSimulationDesign Full scale testBenchmark
Parameterization
Market study
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02 Nozzle Optimization>>Nozzle >>Market-analysis >>Results
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02 Nozzle Optimization >> PreDesign Check >> PSV
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02 Nozzle Optimization>> PreDesign Check - Model Based
Performance check
Based on thrust loadidendity
Assessment of efficiencyimprovement
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02 Nozzle Optimization>> PHASE I
Virtual Product Development:
Phase VIPhase III
Phase II: determine optimal nozzle design with computer simulationsPhase III: verify optimized performance in model testPhase VI: check full scale performance
Phase I: Suitable selection of nozzle geometries / parametriziation
Phase IIPhase I
Prototype modell testSimulationDesign Full scale testBenchmark
Parameterization
Market study
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02 Nozzle Optimization>> Parametrization
Opening angle
Inflow contour
Radius Leading edge
Diffusor geoemetry
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02 Optimization-Workflow>> Applied Tools
Geometry Update CFD Calculation
Optimizer
Optimization setup: Genetic algorithmInput variables: 5 parameters
Design objective: Maximize BP- & FR-performance
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02 Optimization-Workflow>> Applied Tools
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02 Nozzle Optimization>> Examined Designs
Examined Designs:
6
MaximizedBP- & FR-performance
Optimized Design:
Diffusor Optimization(79 designs)
Inflow Optimization(150 designs)
2. step:1. step:
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02 Nozzle Optimization>> PHASE II
Virtual Product Development:
Phase VIPhase III
Phase II: determine optimal nozzle design with computer simulationsPhase III: verify optimized performance in model testPhase VI: check full scale performance
Phase I: Suitable selection of nozzle geometries / parametriziation
Phase IIPhase I
Prototype modell testSimulationDesign Full scale testBenchmark
Parameterization
Market study
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02 Nozzle Optimization>> Modeltest
SRP 510 with optimized nozzle
SVA-Potsdam
Towing Tank
Modeltests with the optimized nozzle:
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Content
01 Introduction
02 Nozzle Optimization
Optimization Technique / Approach
Market Study / Predesign
Parameterization
Design Process / Tools
Model Tests
03 Results
04 Integrated Anode Concept
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03 Results>> Performance >>Open Water Test
Low Speed Operation--- SDV45
--- WAG19A-mod
SDV45 „SCHOTTEL VarioDuct“increased performance proofed in Open Water Tests
Medium & higher Speed Operation
10KQ
KT
eta
… identical bollard pull
and increased freesailing efficiency
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03 Results>> Performance >>Open Water Test
… identical bollard pull
SDV45 „SCHOTTEL VarioDuct“increased performance proofed in Open Water Tests
and increased free sailing efficiency
Offshore Supply Vessel(Free-running-design, SRP430 FP, 1600kW, DP=2.3m)
nozzle WAG19A-mod SDV45
DP-thrust (1kn) [t] 47.1 (100%) 48.5 (+3%)
max. vessel speed [kn] 14.8 (100%) 15.1 (+0.3kn)
power @ 14.8kn [kW] 1571 (100%) 1410 (-10.2%)
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03 Results>> Nozzle >>Performance
1
2
3
4
5
6
7
8
9
10
Bollard Pull DP - Performance Towing Free Running(8-12 kn)
Free Running(>12 kn)
RAN
K
WAG 19aLow-Speed High-Speed
(0 kn) (0-2 kn)
initial nozzle optimized nozzle
(3-6 kn)
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03 Results>> PHASE III
Virtual Product Development:
Phase VIPhase III
Phase II: determine optimal nozzle design with computer simulationsPhase III: verify optimized performance in model testPhase VI: check full scale performance
Phase I: Suitable selection of nozzle geometries / parametriziation
Phase IIPhase I
Prototype modell testSimulationDesign Full scale testBenchmark
Parameterization
Market study
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03 Results>> SDV45
Bollard Pull Test: Harbout Tug - Geta Coast Guard Speed Trial: Escort Tug - Dux
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03 Results>> PHASE IV
Virtual Product Development:
Phase VIPhase III
Phase II: determine optimal nozzle design with computer simulationsPhase III: verify optimized performance in model testPhase VI: check full scale performance
Phase I: Suitable selection of nozzle geometries / parametriziation
Phase IIPhase I
Prototype modell testSimulationDesign Full scale testBenchmark
Parameterization
Market study
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03 Results>> SDV45SDV45 „SCHOTTEL VarioDuct“
…combines great bollard pull capacitieswith excellent free sailing efficiency
at minimized installation space
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Content
01 Introduction
02 Nozzle Optimization
Optimization Technique / Approach
Market Study / Predesign
Parameterization
Design Process / Tools
Model Tests
03 Results
04 Integrated Anode Concept
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04 Integrated Anode Concept>> Invention
The real life …
… a picture is worth a thousand words
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04 Integrated Anode Concept>> Invention
The invention …
… a picture is worth a thousand words
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04 Integrated Anode Concept>> Hydrodynamic Comparison >> OWC
-1.0-0.2 -0.2 0.0 0.0 0.0
-4.0
-2.7 -2.7 -1.7-1.1
-0.1 0.0
-2.0-1.3 -0.9 -0.7 -0.7
-16.8
-12.2
-5.1 -5.8
-3.8
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
SRP150 (1.1m) SRP260 (1.75m ) SRP360 (2.2m) SRP460 (2.7m) SRP630 (3.2m) integrated (blank) blank nozzle
Effic
ienc
y lo
ss[%
](r
elat
ive
tobl
ank
nozz
le)
max speed
transit
best worstAnodelayout:
Reference
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04 Integrated Anode Concept>> Advantages
• less thruster weight
• increased hydrodynamic efficiency:higher speed , less fuel consumption
• reduced risk of anode damage
• minimum installation space
• increased protection time: up to 5 years and more
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