source: a. mason-jones, phd thesis cardiff university (2010) moving mesh approachtime-averaged...
TRANSCRIPT
![Page 1: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/1.jpg)
The Influence of Turbulence Model on Wake Structure of TSTs when
used with a Coupled BEM-CFD Model
Ian Masters, R. Malki, Alison Williams & Nick Croft
Marine Energy Research GroupSwansea University
![Page 2: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/2.jpg)
Modelling Approach
Source: A. Mason-Jones , PhD thesis Cardiff University (2010)
Moving Mesh Approach Time-averaged Approach
![Page 3: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/3.jpg)
Array Modelling
![Page 4: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/4.jpg)
Time-Averaged Influence of Blades
![Page 5: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/5.jpg)
Discretisation of Turbine Blades
![Page 6: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/6.jpg)
Discretisation of Turbine Blades (2)
![Page 7: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/7.jpg)
Impact of Blades on the Flow
![Page 8: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/8.jpg)
Impact of Blades on the Flow (2)
![Page 9: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/9.jpg)
Calculating Resultant Forces
![Page 10: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/10.jpg)
Resolving Forces
![Page 11: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/11.jpg)
Calculating Source Terms (BEMT)
![Page 12: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/12.jpg)
Substituting Source Terms (BEM-CFD)
![Page 13: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/13.jpg)
Substituting Source Terms (BEM-CFD)
![Page 14: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/14.jpg)
Model Domain
0.5m
0.25m
1.4m
0.5m
1.54m
0.84m
0.17m
0.84m
0.17m
![Page 15: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/15.jpg)
Rotor Modelling
![Page 16: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/16.jpg)
Wake Edge Parameters
![Page 17: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/17.jpg)
Wake Edge Characterisation
![Page 18: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/18.jpg)
95% Wake Edges
P∞
PWAKE
P95%
P∞
![Page 19: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/19.jpg)
k-epsilon• Eddy viscosity from single length scale• Turbulent diffusion occurs only at specified scaleRNG k-epsilon• Account for different scales of motionk-omega• Viscous sub-layer flows• Adverse pressure gradients and separating flows
Turbulence Models
![Page 20: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/20.jpg)
Shear Stress Transport (SST)• k-ω near boundary• k-ε in free-stream• Adverse pressure gradients & separating flowsReynolds Stress Model (RSM)• Reynolds Stresses directly computed• Directional effects of Reynolds stress fields• More suitable for anisotropic turbulence
Turbulence Models
![Page 21: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/21.jpg)
Velocity
![Page 22: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/22.jpg)
Velocity
![Page 23: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/23.jpg)
Velocity
![Page 24: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/24.jpg)
Turbulence Intensity
![Page 25: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/25.jpg)
Turbulence Intensity
![Page 26: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/26.jpg)
Turbulence Intensity
![Page 27: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/27.jpg)
Turbulent Viscosity
![Page 28: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/28.jpg)
Lateral Shear
![Page 29: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/29.jpg)
Velocity ProfilesTSR = 4.0
![Page 30: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/30.jpg)
Velocity ProfilesTSR = 4.0 & 6.0
![Page 31: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/31.jpg)
TI ProfilesTSR = 4.0
![Page 32: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/32.jpg)
TI ProfilesTSR = 4.0 & 6.0
![Page 33: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/33.jpg)
Wake Diameter 95% Velocity
TSR = 4.0
![Page 34: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/34.jpg)
Wake Diameter 95% Velocity
TSR = 4.0 & 6.0
![Page 35: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/35.jpg)
Wake Diameter 95% TI
TSR = 4.0
![Page 36: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/36.jpg)
Wake Diameter 95% TI
TSR = 4.0 & 6.0
![Page 37: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/37.jpg)
Wake Diameter 95% dUdz TSR = 4.0
![Page 38: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/38.jpg)
Wake Diameter 95% dUdz
TSR = 4.0 & 6.0
![Page 39: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/39.jpg)
• Turbulence Models affect Hydrodynamics• Lack of Measured Data for Validation• Possibly better represent turbulence
Conclusions
![Page 40: Source: A. Mason-Jones, PhD thesis Cardiff University (2010) Moving Mesh ApproachTime-averaged Approach](https://reader038.vdocuments.us/reader038/viewer/2022110116/551ac25755034606048b4a6d/html5/thumbnails/40.jpg)
Rotor Source Terms