SWIFT FSC GUIDE NET ARRANGEMENTS

Transcription

1 SWIFT FSC GUIDE NET ARRANGEMENTS The guide net arrangement consists of three major net components Guide Net from FSC to south bank Lead Net from FSC to near the center of the gyre in reservoir from FSC to dam (not proposed with initial installation) Two layouts are considered for each component The net arrangements are overlaid on the previous CFD model results and the reservoir bathymetry to assess the interaction between the net layout and the reservoir velocity vectors for 12 different reservoir level and operating condition combinations. The CFD backgrounds are from previous CFD runs and do not include any influence of the nets being present in the flow fields. Value judgments are made for each net component layout relative to the near field velocity vector direction July 5, 27 1

2 Rating System for Net/Velocity Vector Interaction FSC Line of Net Component -2 For Phase 2 net if vectors away from FSC lead into gyre then rating is. Rating depends on where the current leads. (For example, if it leads entirely upstream it would be negative whereas if it leads into the gyre it may be neutral or even positive.) July 5, 27 2

3 1-OFF-N Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 3

4 1-OFF-NS Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 4

5 1-OFF-NB Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 5

6 96-OFF-N Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 6

7 96-OFF-NS Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 7

8 96-OFF-NB Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 8

9 1-ON-N Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 9

10 1-ON-NS Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 1

11 1-ON-NB Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 11

12 96-ON-N Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 12

13 96-ON-NS Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 13

14 96-ON-NB Velocity Vectors at 2-ft Depth Red Layout Yellow Layout July 5, 27 14

15 1-OFF-NS Effect of 7.3 mph Wind at 2-ft Depth Comments: Wind tends to dissipate the gyre effect reducing the effectiveness of the Phase 2 net. Lead net effectiveness somewhat improved. Guide net effectiveness somewhat diminished. Upstream velocity along south bank dissipated earlier, but result in a weak upstream current across central part of reservoir. Red Layout Yellow Layout July 5, 27 15

16 Summary Table of Interaction Values Red Net Layouts Scenario Guide Net Lead Net Phase 1 Total Phase 2 Net Phase 2 Total Comments 1-Off-N Leads to Gyre 1-Off-NS Upstream Current on South Bank 1-Off-NS (with wind) Wind Diminishes Strength of Gyre and Upstream Current on South Bank 1-Off-NB No Vectors Lead to FSC 96-Off-N South Guide Net Vectors Lead Away 96-Off-NS Upstream Current on South Bank 96-Off-NB Guide Net Problems Reduced 1-On-N Leads to Gyre 1-On-NS High Loading 1-On-NB +5 Leads to Gyre 96-On-N Leads to Gyre 96-On-NS High Loading 96-On-NB High Loading July 5, 27 16

17 Summary Table of Interaction Values Yellow Net Layouts Scenario Guide Net Lead Net Phase 1 Total Phase 2 Net Phase 2 Total Comments 1-Off-N Leads to Gyre (All P/H OFF Runs) 1-Off-NS Upstream Current on South Bank 1-Off-NS (with wind) Wind Diminishes Strength of Gyre and Upstream Current on South Bank 1-Off-NB Reverse Flow on Guide Net 96-Off-N South Guide Net Vectors Lead Away 96-Off-NS Upstream Current on South Bank 96-Off-NB South Guide Net Vectors Lead Away 1-On-N Lack of Direction for Flow 1-On-NS +5 Generally Good Flow Conditions 1-On-NB Lack of Direction for Flow 96-On-N Leads to Gyre 96-On-NS +5 Generally Good Flow Conditions 96-On-NB +5 Generally Good Flow Conditions July 5, 27 17